EP3153609A1 - Drive assembly for a textile machine - Google Patents
Drive assembly for a textile machine Download PDFInfo
- Publication number
- EP3153609A1 EP3153609A1 EP16190847.0A EP16190847A EP3153609A1 EP 3153609 A1 EP3153609 A1 EP 3153609A1 EP 16190847 A EP16190847 A EP 16190847A EP 3153609 A1 EP3153609 A1 EP 3153609A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- motor current
- textile
- motor torque
- drive
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- 239000004753 textile Substances 0.000 title claims abstract description 51
- 238000011156 evaluation Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000010801 machine learning Methods 0.000 claims abstract description 4
- 230000007547 defect Effects 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 7
- 230000008719 thickening Effects 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000009466 transformation Effects 0.000 description 19
- 230000000875 corresponding effect Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003909 pattern recognition Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H54/00—Winding, coiling, or depositing filamentary material
- B65H54/70—Other constructional features of yarn-winding machines
- B65H54/74—Driving arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
Definitions
- the invention relates to a drive arrangement for a textile machine comprising a supply of supply for a textile, a removal storage for the textile, a plurality of combined in an operative network drives which are arranged between the supply supply and the removal storage, and with a controller which is adapted to drive the Drives, wherein the controller cooperates with the drives such that the drives of the active composite act together on the textile.
- Textile machines commonly used today provide a drive arrangement with a multiplicity of drives, which are arranged in, for example, three drive trains and process a plurality of textiles simultaneously across drive trains. It is typical that each drive train eight or ten or twelve drives are provided, wherein a first textile of each of the first drives of the various drive trains is processed, a second textile of each second drives of the drive trains and so on. In total, eight or ten or twelve textiles can be processed simultaneously.
- the drives acting on a textile jointly form an active network across drive trains.
- a drive train and cross-functional control is provided for coordinated operation of the drives of the active network and to ensure a smooth interaction of these drives.
- the state of the textile is monitored by means of a mechanical or optical sensor, for example, and / or the processing or operating parameters of the textile machine are checked.
- the object of the present invention is to specify a drive arrangement optimized for the cost of a textile machine.
- the invention in connection with the preamble of claim 1, characterized in that detection means are provided for determining a motor torque signal and / or a motor current signal for at least one of the drives and that the motor torque signal and / or the motor current signal can be supplied to an evaluation unit, wherein the evaluation unit is designed such that, based on the motor torque signal and / or the motor current signal, a system state of the drive arrangement is identified by comparing the motor torque signal and / or the motor current signal with at least one stored in a reference data memory reference signal state of the drive assembly and / or that the system state of the drive assembly is determined by means of machine learning from the motor torque signal and / or the motor current signal.
- the particular advantage of the invention is that a system state of the drive assembly can be monitored without the provision of a thread sensor. In this respect, the costs for the thread sensor can be saved and the design of the drive arrangement can be simplified.
- the actual state of the drive arrangement is determined from the operating signals (motor torque signal, motor current signal) for at least one of the drives and preferably for all drives. Furthermore, a comparison of the motor torque signal or the motor current signal with a reference signal state becomes instantaneous System state (actual state) of the drive assembly detected. For the comparison, an evaluation unit is provided, on the one hand, the motor torque signal or motor current signal is supplied and the other cooperates with a reference data memory or has this. The at least one reference signal state of the drive arrangement is stored in the reference data memory. In this respect, the evaluation unit particularly includes suitably designed calculation means.
- the detection means or the evaluation unit or the controller is designed for reworking the motor torque signal or motor current signal. It can be provided, for example, that is turned off on dynamic, time-variant components of the signals. For example, the amplitudes can be extracted from the motor torque signal or the motor current signal or a transformation of the signal from the time range into the frequency range is carried out.
- the control or the detection means or the evaluation unit provides corresponding calculation means.
- the transformation of the signal from the time domain into the frequency domain in particular the Fourier transformation, the wavelet transformation or the Hilbert-Huang transformation with the Empirical Mode Decomposition are used as the main constituent.
- the Gabor transformation, the fast Fourier transformation or the discrete Fourier transformation in the training can be used as a discrete cosine transformation or as a discrete sine transformation.
- the wavelet transformation uses the discrete wavelet transformation, the fast wavelet transformation, the wavelet packet transformation or the stationary wavelet transformation.
- discrete, static characteristic quantities of the signals can be used and a transformation of the signals in the frequency range can be dispensed with.
- random variables such as the expected value, the absolute deviation, the variance, the skewness, the excess or the covariance are used as parameters.
- the signals can be correlated, in particular cross-correlated or auto-correlated.
- the common intention is in particular, in the context of pattern recognition the actual measurement signal to compare with the reference signal state. This is done in particular on the basis of specific features which are generated from the signal and combined in a feature tool, based on a statement about the similarity of the signals in question.
- a plurality of reference signal states is stored in the reference data memory.
- a first reference signal state which characterizes a bearing defect of the associated drive
- a second reference signal state which characterizes a local thickening of the textile, for example, due to a knot in the textile
- a third reference signal state which characterizes a crack in the textile
- Other reference signal states may be provided, for example, to infer a bearing defect in the supply or removal of the textile to detect an imbalance on the drive train to identify a defective or improperly operating fan of the drive or defects in the field of electronics to characterize.
- loose godets which are defined as rotational bodies on the shafts of the drives, or winding defects can be identified via corresponding reference signal states.
- the operating signals determined via the detection means are each compared directly or in a processed form by the evaluation unit with the stored reference signal states.
- a mechanical or optical yarn sensor is not necessary in this case to identify a crack in the fabric.
- specific actions can be initiated or executed depending on the determined system state of the drive arrangement for the active network. For example, in the event of a bearing failure, the entire functional network with all drives can be shut down until the necessary maintenance work has been completed. Likewise, it can be provided that all drives of the active composite are switched off in the event of a rupture of the textile.
- the controller may be configured to determine a first motor torque signal or a first motor current signal for a first drive and a second motor torque signal or a second motor current signal for an adjacent second drive of the same active network.
- the controller configured to determine a difference of the motor torque signals or the motor current signals. Based on the difference then a processing parameter for the textile, in particular a thread tension is determined.
- closed due to the thread tension on the proper course of the production process and quality control for the textile can be realized in any case indirectly.
- the control of the drive assembly is formed in several stages according to a development of the invention. It comprises a higher-level machine control unit and a plurality of control modules which operate the various drives of the active network.
- the machine control unit and the control modules are connected to one another via a data bus line in terms of data technology.
- the detection means for determining the motor torque signal or the motor current signal and / or the evaluation unit and / or the reference data memory and / or the computing means are part of the controller.
- the drive arrangement according to the invention Fig. 1 comprises a supply supply 1 for a textile 3 to be processed by the textile machine, which is formed by way of example in the manner of a thread, and a removal stock 2, in which the textile 3 is received after processing. Between the supply supply 1 and the removal stock 2, three drives 4, 5, 6 are provided, which are joined together in an operative network and act together on the textile 3. For controlling the drives 4, 5, 6, a control, not shown, is provided.
- the control comprises, for example, a higher-level machine control unit and three control modules assigned to the drives 4, 5, 6, which are connected to the machine control unit via a data bus line in terms of data technology.
- the removal stock 2 provides, for example, a spindle or spool for receiving the textile 3 and a further drive for rotating the textile 3 receiving spindle or spool.
- the supply supply 1 includes by way of example also a spindle or spool for the textile 3. However, according to the present embodiment of the invention, it is passively constructed, that is to say it dispenses with a drive.
- the textile 3 is removed from the supply supply 1 by actuation of the drives 4, 5, 6 which are combined in the active composite.
- this is first supplied to a first drive 4 of the active composite, then to a second drive 5 of the active composite and finally to a third drive 6 of the active composite.
- the drives 4, 5, 6 are arranged in a row, wherein viewed in a yarn transport direction 7, the third drive 6 in front of the second drive 5 and the second drive 5 are provided in front of the first drive 4.
- the first drive 4 is part of a first drive train of the drive assembly. Further drives of this first drive train are actuated together with the first drive 4 by the first drive 4 associated control module.
- the second drive 5 and the third drive 6 are each part of a second and a third drive train.
- the second drive train with the second drive 5 and other drives is operated by a second control module and the third drive train with the third drive 6 and other drives of a third control module.
- the control modules of the drive trains are preferably coupled via a data bus with the higher-level machine control unit data technology.
- a motor torque signal and / or a motor current signal for the first drive 4, the second drive 5 and the third drive 6 are determined via suitable detection means.
- the motor current signal is detected by sensors, whereas the other operating parameters are determined or calculated model-based (sensorless drive). It is then in particular such that the detection means are formed as part of the control and the impressed motor current is detected directly for determining the motor current signal or that the motor torque signal is determined model-based from the operating parameters of the drive arrangement.
- the engine torque signal and the motor current signal can be detected by sensors.
- sensors for example a rotational angle sensor, a rotational speed sensor or a torque sensor can be provided for this purpose.
- the sensors are preferably designed as part of the drives 4, 5, 6 or implemented in a functional and / or spatial manner in these.
- the motor current on the one hand and the rotation angle and / or the rotational speed on the other hand are detected by sensors. Accordingly, sensors for detecting the motor current and rotation angle sensors and / or speed sensors are provided.
- the operating signals (motor torque signal, motor current signal) of the drives 4, 5, 6 which are determined via the detection means are fed to an evaluation unit of the drive arrangement.
- the evaluation unit determines a system state of the drive arrangement by comparing the operating signals with at least one reference signal state of the drive arrangement, which is stored in a reference data memory.
- a plurality of reference signal states are stored in the reference data memory, which characterize, for example, a bearing defect for one of the drives 4, 5, 6 or a bearing defect for the supply supply 1 or the removal supply 2.
- further reference signal states may be provided to characterize the state of the drive arrangement.
- reference signal states can be stored in the reference data memory, from which a faulty fan, an imbalance in the drive train or defective electronics (controllers, frequency converters) of the drives can be inferred.
- reference signal states which are based on the physical components of the drive arrangement
- further reference signal states are stored, which characterize the state or the current processing of the textile 3.
- reference signal states for example, can be stored in the reference data memory, which indicate a local thickening or damage to the textile 3.
- a local thickening may be caused by a node, for example.
- Exemplary show the Fig. 2 to 4 the time course of engine torque signals, which are determined by the detection means of the drive assembly. In each case, the engine torque M is plotted over the time t.
- FIG. 2 shows a periodically recurring engine torque signal, which is for example indicative of a bearing defect A of the associated drive 4, 5, 6.
- the motor torque signal is now processed and closed by comparing the values with the stored in the reference data memory reference signal states on the system state of the drive assembly.
- a torque characteristic is disclosed in a further engine torque signal over time, which shows a node B in the textile 3 in interaction with a drive 4, 5, 6.
- the system state relative to the processed textile 3 is identified. For example, if the textile 3 has a node unscheduled, the production process can be stopped or interrupted at short notice. If, for example, a textile is processed with locally different thickness structure, the periodic signal can be used to monitor a planned or smooth production process.
- FIGS. 2 and 3 A combination of system states after the FIGS. 2 and 3 is in the motor torque signal after Fig. 4 shown.
- the two events are detected by a pattern comparison carried out in particular in the evaluation unit and it can be provided, in particular, to stop the textile machine for repairing the bearing defect or for performing correctors on the textile 3.
- a post-processing of the signal, a filtering or an extraction of characteristic dynamic variables can be carried out in particular.
- the engine torque signal and / or the motor current signal are transformed from the time domain into the frequency domain or otherwise reworked.
- the evaluation unit, the detection means or the controller have for this purpose the necessary computing means.
- a Fourier analysis, a wavelet transformation, a waterfall diagram or the Empirical Mode Decomposition can be used.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Quality & Reliability (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Die Erfindung betrifft Antriebsanordnung für eine Textilmaschine umfassend einen Bereitstellungsvorrat (1) für ein Textil (3), einen Entnahmevorrat (2) für das Textil, eine Mehrzahl von in einem Wirkverbund zusammengefassten Antrieben (4, 5, 6), welche zwischen dem Bereitstellungsvorrat und dem Entnahmevorrat angeordnet sind, und mit einer Steuerung, welche ausgebildet ist zum Ansteuern der Antriebe, wobei die Steuerung mit den Antrieben derart zusammenwirkt, dass die Antriebe des Wirkverbunds gemeinsam auf das Textil einwirken, wobei Erfassungsmittel vorgesehen sind zum Bestimmen eines Motordrehmomentsignals und/oder eines Motorstromsignals für wenigstens einen der Antriebe und dass das Motordrehmomentsignal und/oder das Motorstromsignal einer Auswerteeinheit zuführbar ist, wobei die Auswerteeinheit derart ausgebildet ist, dass auf Basis des Motordrehmomentsignals und/oder des Motorstromsignals ein Systemzustand der Antriebsanordnung durch Vergleich des Motordrehmomentsignals und/oder des Motorstromsignals mit mindestens einem in einem Referenzdatenspeicher abgelegten Referenzsignalzustand der Antriebsanordnung identifiziert wird und/oder dass der Systemzustand der Antriebsanordnung mit Mitteln des maschinellen Lernens aus den Motordrehmomentsignal und/oder dem Motorstromsignal bestimmt wird.The invention relates to a drive arrangement for a textile machine comprising a supply supply (1) for a textile (3), a removal storage (2) for the textile, a plurality of combined in a knitted unit drives (4, 5, 6), which between the supply supply and the control device, which is designed to control the drives, wherein the controller cooperates with the drives such that the drives of the active combination act together on the textile, wherein detection means are provided for determining a motor torque signal and / or a Motor current signal for at least one of the drives and that the motor torque signal and / or the motor current signal can be fed to an evaluation unit, wherein the evaluation unit is configured such that based on the motor torque signal and / or the motor current signal, a system state of the drive assembly by comparing the motor torque signal and / or the motor current signal is identified with at least one stored in a reference data memory reference signal state of the drive assembly and / or that the system state of the drive assembly is determined by means of machine learning from the motor torque signal and / or the motor current signal.
Description
Die Erfindung betrifft eine Antriebsanordnung für eine Textilmaschine umfassend einen Bereitstellungsvorrat für ein Textil, einen Entnahmevorrat für das Textil, eine Mehrzahl von in einem Wirkverbund zusammengefassten Antrieben welche zwischen dem Bereitstellungsvorrat und dem Entnahmevorrat angeordnet sind, und mit einer Steuerung, welche ausgebildet ist zum Ansteuern der Antriebe, wobei die Steuerung mit den Antrieben derart zusammenwirkt, dass die Antriebe des Wirkverbunds gemeinsam auf das Textil einwirken.The invention relates to a drive arrangement for a textile machine comprising a supply of supply for a textile, a removal storage for the textile, a plurality of combined in an operative network drives which are arranged between the supply supply and the removal storage, and with a controller which is adapted to drive the Drives, wherein the controller cooperates with the drives such that the drives of the active composite act together on the textile.
Heute üblicherweise verwendete Textilmaschinen sehen eine Antriebsanordnung mit einer Vielzahl von Antrieben vor, welche in beispielsweise drei Antriebssträngen angeordnet sind und antriebsstrangübergreifend eine Mehrzahl von Textilen gleichzeitig bearbeiten. Typisch ist, dass je Antriebsstrang acht oder zehn oder zwölf Antriebe vorgesehen werden, wobei ein erstes Textil von jeweils ersten Antrieben der verschiedenen Antriebsstränge bearbeitet wird, ein zweites Textil von jeweils zweiten Antrieben der Antriebsstränge und so weiter. Insgesamt können so acht oder zehn oder zwölf Textile gleichzeitig bearbeitet werden.Textile machines commonly used today provide a drive arrangement with a multiplicity of drives, which are arranged in, for example, three drive trains and process a plurality of textiles simultaneously across drive trains. It is typical that each drive train eight or ten or twelve drives are provided, wherein a first textile of each of the first drives of the various drive trains is processed, a second textile of each second drives of the drive trains and so on. In total, eight or ten or twelve textiles can be processed simultaneously.
Jeweils bilden die auf ein Textil gemeinsam einwirkenden Antriebe antriebsstrangübergreifend einen Wirkverbund. Zum koordinierten Betreiben der Antriebe des Wirkverbunds und zur Sicherstellung eines reibungslosen Zusammenwirkens dieser Antriebe ist eine antriebsstrang- und wirkverbundübergreifend Steuerung vorgesehen. Zusätzlich werden über einen beispielsweise mechanischen oder optischen Sensor der Zustand des Textils überwacht und/oder die Verarbeitungs- beziehungsweise Betriebsparameter der Textilmaschine kontrolliert.In each case, the drives acting on a textile jointly form an active network across drive trains. For coordinated operation of the drives of the active network and to ensure a smooth interaction of these drives a drive train and cross-functional control is provided. In addition, the state of the textile is monitored by means of a mechanical or optical sensor, for example, and / or the processing or operating parameters of the textile machine are checked.
Aufgabe der vorliegenden Erfindung ist es, eine hinsichtlich der Kosten optimierte Antriebsanordnung für eine Textilmaschine anzugeben.The object of the present invention is to specify a drive arrangement optimized for the cost of a textile machine.
Zur Lösung der Aufgabe ist die Erfindung in Verbindung mit dem Oberbegriff des Patentanspruchs 1 dadurch gekennzeichnet, dass Erfassungsmittel vorgesehen sind zum Bestimmen eines Motordrehmomentsignals und/oder eines Motorstromsignals für wenigstens einen der Antriebe und dass das Motordrehmomentsignal und/oder das Motorstromsignal einer Auswerteeinheit zuführbar ist, wobei die Auswerteeinheit derart ausgebildet ist, dass auf Basis des Motordrehmomentsignals und/oder des Motorstromsignals ein Systemzustand der Antriebsanordnung durch Vergleich des Motordrehmomentsignals und/oder des Motorstromsignals mit mindestens einem in einem Referenzdatenspeicher abgelegten Referenzsignalzustand der Antriebsanordnung identifiziert wird und/oder dass der Systemzustand der Antriebsanordnung mit Mitteln des maschinellen Lernens aus den Motordrehmomentsignal und/oder dem Motorstromsignal bestimmt wird.To achieve the object, the invention in connection with the preamble of
Der besondere Vorteil der Erfindung besteht darin, dass ein Systemzustand der Antriebsanordnung ohne das Vorsehen eines Fadensensors überwacht werden kann. Es können insofern die Kosten für den Fadensensor eingespart werden und die Ausgestaltung der Antriebsanordnung vereinfacht sind.The particular advantage of the invention is that a system state of the drive assembly can be monitored without the provision of a thread sensor. In this respect, the costs for the thread sensor can be saved and the design of the drive arrangement can be simplified.
Statt einen Fadenspannungssensor zu verwenden, wird aus dem Betriebssignalen (Motordrehmomentsignal, Motorstromsignal) wenigstens für einen der Antriebe und bevorzugt für alle Antriebe der Ist-Zustand der Antriebsanordnung ermittelt. Im Weiteren wird durch einen Vergleich des Motordrehmomentsignals beziehungsweise des Motorstromsignals mit einem Referenzsignalzustand ein momentaner Systemzustand (Ist-Zustand) der Antriebsanordnung erfasst. Für den Vergleich ist eine Auswerteeinheit vorgesehen, der zum einen das Motordrehmomentsignal beziehungsweise Motorstromsignal zugeführt wird und die zum anderen mit einem Referenzdatenspeicher zusammenwirkt beziehungsweise diesen aufweist. In dem Referenzdatenspeicher ist der mindestens eine Referenzsignalzustand der Antriebsanordnung hinterlegt. Die Auswerteeinheit umfasst insofern insbesondere geeignet ausgebildete Rechenmittel.Instead of using a yarn tension sensor, the actual state of the drive arrangement is determined from the operating signals (motor torque signal, motor current signal) for at least one of the drives and preferably for all drives. Furthermore, a comparison of the motor torque signal or the motor current signal with a reference signal state becomes instantaneous System state (actual state) of the drive assembly detected. For the comparison, an evaluation unit is provided, on the one hand, the motor torque signal or motor current signal is supplied and the other cooperates with a reference data memory or has this. The at least one reference signal state of the drive arrangement is stored in the reference data memory. In this respect, the evaluation unit particularly includes suitably designed calculation means.
Insbesondere kann vorgesehen sein, dass die Erfassungsmittel beziehungsweise die Auswerteeinheit beziehungsweise die Steuerung ausgebildet ist zum Nachbearbeiten des Motordrehmomentsignals beziehungsweise Motorstromsignals. Es kann beispielsweise vorgesehen sein, dass auf dynamische, zeitveränderliche Komponenten der Signale abgestellt wird. Beispielsweise können aus dem Motordrehmomentsignal beziehungsweise dem Motorstromsignal die Amplituden extrahiert werden oder es wird eine Transformation des Signals aus dem Zeitbereich in den Frequenzbereich durchgeführt. Die Steuerung beziehungsweise die Erfassungsmittel oder die Auswerteeinheit sieht hierzu entsprechende Rechenmittel vor. Zur Transformation des Signals aus dem Zeitbereich in den Frequenzbereich werden insbesondere die Fourier-Transformation, die Wavelet-Transformation beziehungsweise die Hilbert-Huang-Transformation mit der Empirical Mode Decomposition als Hauptbestandteil verwendet. Im Rahmen der Fourier-Transformation kann insbesondere die Kurzzeit-Fourier-Transformation, die Gabor-Transformation, die schnelle Fourier-Transformation beziehungsweise die diskrete Fourier-Transformation in der Ausbildung als diskrete Kosinus-Transformation oder als diskrete Sinus-Transformation zur Anwendung kommen. Bei der Wavelet-Transformation werden insbesondere die diskrete Wavelet-Transformation, die schnelle Wavelet-Transformation, die Wavelet-Paket-Transformation beziehungsweise die stationäre Wavelet-Transformation verwendet. Ebenso können diskrete, statische Kenngrößen der Signale verwendet und auf eine Transformation der Signale in dem Frequenzbereich verzichtet werden. Als Kenngrößen kommen insbesondere Zufallsvariable wie der Erwartungswert, die absolute Abweichung, die Varianz, die Schiefe, der Exzess beziehungsweise die Kovarianz zur Anwendung. Ebenso können die Signale korreliert, insbesondere Kreuz-Korreliert beziehungsweise Auto-Korreliert werden. Schließlich ist eine Kombination der transformierten Signale und der statischen Kenngrößen darstellbar. Die gemeinsame Intention ist insbesondere, im Rahmen der Mustererkennung das tatsächliche Messsignal mit dem Referenzsignalzustand zu vergleichen. Dies erfolgt insbesondere anhand spezifischer Merkmale, welche aus dem Signal erzeugt und in einem Merkmalswerkzeug zusammengefasst werden, auf Basis einer Aussage über die Ähnlichkeit der in Rede stehenden Signale.In particular, it can be provided that the detection means or the evaluation unit or the controller is designed for reworking the motor torque signal or motor current signal. It can be provided, for example, that is turned off on dynamic, time-variant components of the signals. For example, the amplitudes can be extracted from the motor torque signal or the motor current signal or a transformation of the signal from the time range into the frequency range is carried out. For this purpose, the control or the detection means or the evaluation unit provides corresponding calculation means. For the transformation of the signal from the time domain into the frequency domain, in particular the Fourier transformation, the wavelet transformation or the Hilbert-Huang transformation with the Empirical Mode Decomposition are used as the main constituent. In the context of the Fourier transformation, in particular the short-time Fourier transformation, the Gabor transformation, the fast Fourier transformation or the discrete Fourier transformation in the training can be used as a discrete cosine transformation or as a discrete sine transformation. In particular, the wavelet transformation uses the discrete wavelet transformation, the fast wavelet transformation, the wavelet packet transformation or the stationary wavelet transformation. Likewise, discrete, static characteristic quantities of the signals can be used and a transformation of the signals in the frequency range can be dispensed with. In particular, random variables such as the expected value, the absolute deviation, the variance, the skewness, the excess or the covariance are used as parameters. Likewise, the signals can be correlated, in particular cross-correlated or auto-correlated. Finally, a combination of the transformed signals and the static characteristics can be displayed. The common intention is in particular, in the context of pattern recognition the actual measurement signal to compare with the reference signal state. This is done in particular on the basis of specific features which are generated from the signal and combined in a feature tool, based on a statement about the similarity of the signals in question.
Es kann weiter vorgesehen sein, dass in dem Referenzdatenspeicher eine Mehrzahl von Referenzsignalzuständen abgelegt ist. Beispielsweise sind in dem Referenzdatenspeicher ein erster Referenzsignalzustand, welcher einen Lagerdefekt des zugeordneten Antriebs charakterisiert, und ein zweiter Referenzsignalzustand, welcher eine beispielsweise auf einen Knoten im Textil zurückgehende lokale Verdickung des Textils charakterisiert, und ein dritter Referenzsignalzustand hinterlegt, welcher einen Riss in dem Textil charakterisiert. Weitere Referenzsignalzustände können beispielsweise vorgesehen sein, um auf einen Lagerdefekt in dem Bereitstellungsvorrat oder dem Entnahmevorrat des Textils zu schließen, um eine Unwucht an dem Antriebsstrang zu erkennen, um einen defekten beziehungsweise nicht ordnungsgemäß arbeiteten Lüfter des Antriebs zu identifizieren oder um Defekte am Bereich der Elektronik zu charakterisieren. Ebenso können lose Galetten, welche als Rotationskörper an den Wellen der Antriebe festgelegt sind, oder Wicklungsdefekte über entsprechende Referenzsignalzustände identifiziert werden. Jeweils werden hierzu die über die Erfassungsmittel bestimmten Betriebssignale unmittelbar oder in aufbereiteter Form von der Auswerteeinheit mit den abgespeicherten Referenzsignalzuständen verglichen. Ein mechanischer beziehungsweise optischer Fadensensor ist in diesem Fall beispielsweise nicht notwendig, um einen Riss in dem Textil zu identifizieren. Jeweils können für den Wirkverbund abhängig von dem ermittelten Systemzustand der Antriebsanordnung bestimmte Aktionen eingeleitet oder ausgeführt werden. Beispielsweise kann bei einem Lagerdefekt der gesamte Wirkverbund mit allen Antrieben stillgesetzt werden, bis die notwendigen Instandhaltungsarbeiten abgeschlossen sind. Ebenso kann vorgesehen sein, dass alle Antriebe des Wirkverbunds bei einem Riss des Textils abgeschaltet werden.It may further be provided that a plurality of reference signal states is stored in the reference data memory. For example, in the reference data memory, a first reference signal state, which characterizes a bearing defect of the associated drive, and a second reference signal state, which characterizes a local thickening of the textile, for example, due to a knot in the textile, and a third reference signal state, which characterizes a crack in the textile , Other reference signal states may be provided, for example, to infer a bearing defect in the supply or removal of the textile to detect an imbalance on the drive train to identify a defective or improperly operating fan of the drive or defects in the field of electronics to characterize. Likewise, loose godets, which are defined as rotational bodies on the shafts of the drives, or winding defects can be identified via corresponding reference signal states. For this purpose, the operating signals determined via the detection means are each compared directly or in a processed form by the evaluation unit with the stored reference signal states. For example, a mechanical or optical yarn sensor is not necessary in this case to identify a crack in the fabric. In each case, specific actions can be initiated or executed depending on the determined system state of the drive arrangement for the active network. For example, in the event of a bearing failure, the entire functional network with all drives can be shut down until the necessary maintenance work has been completed. Likewise, it can be provided that all drives of the active composite are switched off in the event of a rupture of the textile.
Nach einer Weiterbildung der Erfindung kann die Steuerung ausgebildet sein zum Ermitteln eines ersten Motordrehmomentsignals beziehungsweise eines ersten Motorstromsignals für einen ersten Antrieb und eines zweiten Motordrehmomentsignals beziehungsweise eines zweiten Motorstromsignals für einen benachbarten zweiten Antrieb des gleichen Wirkverbunds. Weiter ist die Steuerung ausgebildet zum Ermitteln einer Differenz der Motordrehmomentsignale beziehungsweise der Motorstromsignale. Anhand der Differenz wird dann ein Verarbeitungsparameter für das Textil, insbesondere eine Fadenspannung ermittelt. Vorteilhaft kann aufgrund der Fadenspannung auf den ordnungsgemäßen Verlauf des Produktionsprozesses geschlossen und eine Qualitätskontrolle für das Textil jedenfalls mittelbar realisiert werden.According to a development of the invention, the controller may be configured to determine a first motor torque signal or a first motor current signal for a first drive and a second motor torque signal or a second motor current signal for an adjacent second drive of the same active network. Next is the controller configured to determine a difference of the motor torque signals or the motor current signals. Based on the difference then a processing parameter for the textile, in particular a thread tension is determined. Advantageously, closed due to the thread tension on the proper course of the production process and quality control for the textile can be realized in any case indirectly.
Die Steuerung der Antriebsanordnung ist nach einer Weiterbildung der Erfindung mehrstufig ausgebildet. Sie umfasst eine übergeordnete Maschinensteuereinheit sowie eine Mehrzahl von Steuermodulen, welche die verschiedenen Antriebe des Wirkverbunds betreiben. Die Maschinensteuereinheit und die Steuermodule sind über eine Datenbusleitung datentechnisch miteinander verbunden. Beispielsweise sind die Erfassungsmittel zum Bestimmen des Motordrehmomentsignals beziehungsweise es Motorstromsignals und/oder die Auswerteeinheit und/oder der Referenzdatenspeicher und/oder die Rechenmittel Teil der Steuerung.The control of the drive assembly is formed in several stages according to a development of the invention. It comprises a higher-level machine control unit and a plurality of control modules which operate the various drives of the active network. The machine control unit and the control modules are connected to one another via a data bus line in terms of data technology. For example, the detection means for determining the motor torque signal or the motor current signal and / or the evaluation unit and / or the reference data memory and / or the computing means are part of the controller.
Aus den weiteren Unteransprüchen und der nachfolgenden Beschreibung sind weitere Vorteile, Merkmale und Einzelheiten der Erfindung zu entnehmen. Dort erwähnte Merkmale können jeweils einzeln für sich oder auch in beliebiger Kombination erfindungswesentlich sein. Die Zeichnungen dienen lediglich beispielhaft der Klarstellung der Erfindung und haben keinen einschränkenden Charakter.From the other dependent claims and the following description further advantages, features and details of the invention can be found. There mentioned features may be essential to the invention individually or in any combination. The drawings are merely illustrative of the clarification of the invention and are not of a restrictive nature.
Es zeigen:
- Fig. 1
- eine Prinzipdarstellung einer erfindungsgemäßen Antriebsanordnung für eine Textilmaschine,
- Fig. 2
- einen ersten Zeitverlauf eines Motordrehmomentsignals,
- Fig. 3
- einen zweiten Zeitverlauf des Motordrehmomentsignals und
- Fig. 4
- einen dritten Zeitverlauf des Motordrehmomentsignals.
- Fig. 1
- a schematic diagram of a drive arrangement according to the invention for a textile machine,
- Fig. 2
- a first time course of a motor torque signal,
- Fig. 3
- a second time course of the engine torque signal and
- Fig. 4
- a third time course of the motor torque signal.
Die erfindungsgemäße Antriebsanordnung nach
Bei der Bearbeitung des Textils 3 wird eben dieses zunächst einem ersten Antrieb 4 des Wirkverbunds, dann einem zweiten Antrieb 5 des Wirkverbunds und schließlich einem dritten Antrieb 6 des Wirkverbunds zugeführt. Die Antriebe 4, 5, 6 sind dabei reihenartig angeordnet, wobei in eine Fadentransportrichtung 7 betrachtet der dritte Antrieb 6 vor dem zweiten Antrieb 5 und der zweite Antrieb 5 vor dem ersten Antrieb 4 vorgesehen sind.During the processing of the
Der erste Antrieb 4 ist dabei Teil eines ersten Antriebsstrangs der Antriebsanordnung. Weitere Antriebe dieses ersten Antriebsstrangs werden gemeinsam mit dem ersten Antrieb 4 durch das dem ersten Antrieb 4 zugeordnete Steuermodul betätigt. In analoger Weise sind der zweite Antrieb 5 und der dritte Antrieb 6 jeweils Teil eines zweiten und eines dritten Antriebsstrangs. Der zweite Antriebsstrang mit dem zweiten Antrieb 5 sowie weiteren Antrieben wird von einem zweiten Steuermodul und der dritte Antriebsstrang mit dem dritten Antrieb 6 sowie weiteren Antrieben von einem dritten Steuermodul betrieben. Die Steuermodule der Antriebsstränge sind bevorzugt über eine Datenbusleitung mit der übergeordneten Maschinensteuereinheit datentechnisch gekoppelt.The
Während des Betriebs werden ein Motordrehmomentsignal und/oder ein Motorstromsignal für den ersten Antrieb 4, dem zweiten Antrieb 5 und dem dritten Antrieb 6 über geeignete Erfassungsmittel bestimmt. Beispielsweise wird insbesondere das Motorstromsignal sensorisch erfasst, wohingegen die anderen Betriebsparameter modellbasiert bestimmt beziehungsweise berechnet werden (sensorloser Antrieb). Es ist dann insbesondere so, dass die Erfassungsmittel als Teil der Steuerung ausgebildet sind und der aufgeprägte Motorstrom direkt erfasst wird zur Bestimmung des Motorstromsignals oder dass das Motordrehmomentsignal modellbasiert aus dem Betriebsparametern der Antriebsanordnung bestimmt wird.During operation, a motor torque signal and / or a motor current signal for the
Nach einer alternativen, nicht dargestellten Ausführungsform der Erfindung können das Motordrehmomentsignal und das Motorstromsignal sensorisch erfasst werden. Es können hierzu geeignete Sensoren, beispielsweise ein Drehwinkelsensor, ein Drehzahlsensor beziehungsweise ein Drehmomentsensor vorgesehen werden. Die Sensoren sind bevorzugt als Teil der Antriebe 4, 5, 6 ausgeführt beziehungsweise funktional und/oder räumlich in diesen integriert realisiert. Ebenso kann vorgesehen sein, dass zur modellgestützten Bestimmung des Motordrehmoments der Motorstrom einerseits und der Drehwinkel und/oder die Drehzahl andererseits sensorisch erfasst werden. Demzufolge sind Sensoren zur Erfassung des Motorstroms und Drehwinkelsensoren und/oder Drehzahlsensoren vorgesehen.According to an alternative, not shown embodiment of the invention, the engine torque signal and the motor current signal can be detected by sensors. Suitable sensors, for example a rotational angle sensor, a rotational speed sensor or a torque sensor can be provided for this purpose. The sensors are preferably designed as part of the
Die über die Erfassungsmittel bestimmten Betriebssignale (Motordrehmomentsignal, Motorstromsignal) der Antriebe 4, 5, 6 werden einer Auswerteeinheit der Antriebsanordnung zugeführt. Beispielsweise bestimmt die Auswerteeinheit einen Systemzustand der Antriebsanordnung, indem die Betriebssignale mit wenigstens einem Referenzsignalzustand der Antriebsanordnung verglichen wird, welcher in einem Referenzdatenspeicher abgelegt ist. Bevorzugt wird in dem Referenzdatenspeicher eine Mehrzahl von Referenzsignalzuständen hinterlegt, welche beispielsweise einen Lagerdefekt für einen der Antriebe 4, 5, 6 beziehungsweise einen Lagerdefekt für den Bereitstellungsvorrat 1 oder den Entnahmevorrat 2 charakterisieren. In analoger Weise können weitere Referenzsignalzuständen vorgesehen sein, um den Zustand der Antriebsanordnung zu charakterisieren. Insbesondere können Referenzsignalzustände in dem Referenzdatenspeicher hinterlegt sein, aus denen auf einen defekten Lüfter, eine Unwucht im Antriebsstrang oder eine defekte Elektronik (Kontroller, Frequenzumrichter) der Antriebe geschlossen werden kann. Beispielsweise erfolgt die Beurteilung des Systemzustands der Antriebsanordnung über Mittel des maschinellen Lernens.The operating signals (motor torque signal, motor current signal) of the
Ebenfalls kann vorgesehen sein, dass korrespondierende Betriebssignale für benachbarte Antriebe bestimmt werden und aus einer Differenz der Betriebssignale der benachbarten Antriebe 4, 5, 6 auf eine Fadenspannung geschlossen wird. Es kann insofern vorgesehen sein, dass zusätzlich zu den Referenzsignalzuständen, welche auf die physikalischen Komponenten der Antriebsanordnung abstellen, weitere Referenzsignalzustände hinterlegt sind, welche den Zustand beziehungsweise die aktuelle Verarbeitung des Textils 3 charakterisieren. Insofern können beispielsweise Referenzsignalzustände in dem Referenzdatenspeicher hinterlegt sein, welche auf eine lokale Verdickung oder Schädigung des Textils 3 schließen lassen. Eine lokale Verdickung kann beispielsweise durch einen Knoten hervorgerufen sein.It can also be provided that corresponding operating signals for adjacent drives are determined and from a difference of the operating signals of the
Exemplarisch zeigen die
Ein erstes Beispiel für das Motordrehmomentsignal nach
Nach
Eine Kombination der Systemzustände nach den
Lediglich exemplarisch zeigen die
Gleiche Bauteile und Bauteilfunktionen sind durch gleiche Bezugszeichen gekennzeichnet.Identical components and component functions are identified by the same reference numerals.
Claims (9)
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DE102018112797A1 (en) * | 2018-05-29 | 2019-12-05 | Maschinenfabrik Rieter Ag | Method for determining operating states of a textile machine and a textile machine |
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