CN101451589B - Semi-automatic control device of passive structure vibration - Google Patents
Semi-automatic control device of passive structure vibration Download PDFInfo
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- CN101451589B CN101451589B CN2008102429459A CN200810242945A CN101451589B CN 101451589 B CN101451589 B CN 101451589B CN 2008102429459 A CN2008102429459 A CN 2008102429459A CN 200810242945 A CN200810242945 A CN 200810242945A CN 101451589 B CN101451589 B CN 101451589B
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Abstract
The invention discloses a passive structural vibration semi-active control device, comprising at least one piezoelectric patch which is adhered and arranged on the surface of a structure to be controlled and an electric-controlled device, and the electric-controlled device comprises an electrical signal connector, a full-wave bridge which consists of a first diode, a second diode, a third diode and a fourth diode, a signal conditioning circuit which consists of a first resistance, a second resistance, a third resistance and a first capacitance, a peak value trigger circuit which consists of a first triode, a second triode and a fourth resistance and an analog switch which consists of a third triode; the operation of the switch in the device is controlled by the induced voltage of a piezoelectric element, and the energy of the structural vibration is consumed by the switch circuit. The device does not need an external power source, has simple circuit structure, small volume and good robustness and has wide application prospect in structural vibration noise control.
Description
One, technical field
The present invention relates to a kind of structural vibration control device, relate in particular to a kind of structural vibration control device that need not extraneous power supply.
Two, background technique
Vibration control is an important branch in the vibration engineering field, and its task is exactly to make the level of vibration of controll plant satisfy people's pre-provisioning request by certain means.In a broad sense, vibration control comprises the content of two aspects: the one, utilize favourable vibration, and be to reduce nuisance vibration.But usually said vibration control is meant the latter, to the inhibition of vibration.According to adopt and suppress the vibration means branch, the method for vibration control has five kinds: weakening, vibration isolation, resistance are shaken, absorbing, structural modification.Weakening is promptly eliminated or is weakened vibration source, and this is fundamentally to suppress the method vibrated.Vibration isolation is meant that serially adding a subtense angle between vibration source and controll plant is referred to as vibration isolator, reduces the exciter response of controll plant to vibration source with it.Absorbing is that additional subtense angle is referred to as dynamic vibration absorber on controll plant, and the absorbing power that produces with its is to reduce the response of controll plant to the vibration source excitation.Resistance is shaken, and is called damping vibration attenuation again, and promptly additional damping device or damping member on controll plant reduce response by consumed energy.Dynamics parameter by the structural modification controll plant makes vibration satisfy pre-provisioning request, this is a kind of vibration control scheme that does not need additional any subtense angle, be very noticeable at present, but be some environment, in aircraft, revise original structure, do not influence aerodynamic configuration unavoidably, this method is restricted again.
According to whether needing the extraneous source branch that supplies, vibration control can be divided into active control and Passive Shape Control, and the former is called Passive Control again, and the latter is called ACTIVE CONTROL again.In recent years, along with the development of technology, risen a kind of method that active control technology is combined with the Passive Control technology again, half active control technology.
Three, summary of the invention
1, technical problem
The technical problem to be solved in the present invention provides and does not a kind ofly need extraneous power supply can reach control structure vibration purpose Structural Vibration Semi-active Control Technology device, it does not need special extraneous power supply, form switching circuit by special electronic circuit, control piezoelectric material, utilize its inverse piezoelectric effect that structural vibration is controlled.
2, technological scheme
In order to solve above-mentioned technical problem, semi-automatic control device of passive structure vibration of the present invention comprises at least one piezoelectric element that is sticked at body structure surface to be controlled, also comprise an electric control device, described electric control device comprises that electrical signal connects plug-in unit, by first, second, the full-wave bridge that third and fourth diode is formed, by first resistance, second resistance, the signal conditioning circuit that the 3rd resistance and first electric capacity are formed, by first triode, peak value trigger circuit that second triode and the 4th resistance are formed and the analog switch of forming by the 3rd triode; First end that electrical signal connects plug-in unit is connected with the positive pole of piezoelectric element, and second end is connected with the negative pole of piezoelectric element; Electrical signal connects first termination of plug-in unit goes between first diode in the full-wave bridge, second diode, and second termination is gone between the 3rd diode and the 4th diode; In the full-wave bridge, the anode of first diode is connected with the negative electrode of second diode, the anode of the 3rd diode is connected with the negative electrode of the 4th diode, and the negative electrode of first diode is connected with the negative electrode of the 3rd diode, and the anode of second diode is connected with the anode of the 4th diode; In the signal conditioning circuit, first resistance, one end is connected with the negative electrode of first diode, the other end connects by the anode of first electric capacity, second diode, and second resistance, one end is connected with the negative electrode of first diode, and the other end is connected with the anode of second diode by the 3rd resistance; In the peak value trigger circuit, the emitter of first triode inserts between first resistance and first electric capacity, collector electrode is connected with the anode of second diode by the 4th resistance, its base stage is connected with the collector electrode of second triode, the base stage of second triode is connected with the collector electrode of first triode, and collector electrode inserts between second resistance and the 3rd resistance; In the analog switch, the collector electrode of triode is connected with the negative electrode of first diode, and base stage is connected with the emitter of second triode, and its emitter is connected with the anode of second diode.
In the technological scheme of the present invention, piezoelectric element is sticked on the vibrational structure, generally be positioned over the biggest place of structural vibration, and will realize that the terminal of the electric control device of half active control function are connected with the positive and negative polarities of piezoelectric element.By the vibration that the voltage on the piezoelectric element comes induction structure, the voltage on the piezoelectric element is transferred in the electric control device by lead simultaneously.When the voltage on the piezoelectric element reaches very big or minimum, switch in this device of the automatic conducting of trigger circuit in the electric control device, cause positive and negative polarities on the piezoelectric element by short circuit, voltage on the piezoelectric element changes to zero by maximum value or minimum value, while is owing to the change and the inverse piezoelectric effect of voltage-phase on the piezoelectric element, piezoelectric element has produced a power that hinders structural vibration, makes structural vibrations obtain to a certain degree control.This device need not the external world provides power supply just can work, and the energy in the circuit comes from piezoelectric element fully.Comprise a rectifier bridge of being made up of four diodes in the electric control device, one by three resistance and the signal conditioning circuit that electric capacity is formed, peak value trigger circuit of being made up of two triodes, an analog switch that is made of triode.The input end of the rectifier bridge in the positive and negative electrode of piezoelectric element and the electric control device is connected, the output terminal of rectifier bridge is connected with the input end of signal conditioning circuit, the output terminal of signal conditioning circuit is connected with the input end of peak value trigger circuit, the signal output part of peak value trigger circuit is connected to the control end of analog switch, and the disconnection of control analog switch is with closed.
The working procedure of electric control device is: the sine voltage signal on the piezoelectric element is by behind the rectifier bridge, and negative half-wave upset is positive half-wave, is transferred to signal conditioning circuit through the voltage signal of over commutation.By the dividing potential drop in the signal conditioning circuit, time-delay, an original voltage signal is divided into two groups of voltage signals of being nursed one's health, and one has certain decay on amplitude, and another has had certain time-delay on phase place.These two groups of voltage signals are transferred to the peak value trigger circuit again, the comparison of the relative size by two signals, and the peak value trigger circuit generate a high level when piezoelectric element voltage reaches peak value, and control analog switch closure.Piezoelectric element the two poles of the earth were by short circuit when analog switch was closed, and the voltage on it is zero in instantaneous variation, thereby reached the purpose of synchronous short circuit.Since the voltage on the piezoelectric element by short circuit after phase place variation has taken place, simultaneously because inverse piezoelectric effect, piezoelectric element has produced a power that hinders structural vibration, thereby reaches the purpose that suppresses structural vibration.
3, beneficial effect
The present invention relates to a device that carries out vibration control based on half active vibration control technique, utilization conforms to structurally the piezoelectric element of face and responds to and come structural vibrations, the work that utilizes the induced voltage of piezoelectric element to come switch in the control gear, and consume the energy of structural vibration by switching circuit.Do not need outside resources, circuit structure is simple, and volume is little, and robustness is good, is with a wide range of applications in structural vibration noise control.
Four, description of drawings
Fig. 1 is principle of the invention figure;
Fig. 2 is the electric control device schematic diagram;
Fig. 3 is the electric control device circuit theory diagrams;
Fig. 4 is the embodiments of the invention schematic diagrams.
Five, embodiment
Shown in Fig. 3,4, the structural vibration control device based on half active vibration control technique of present embodiment comprises piezo-electric sheet 12 and electric control device 13, wherein, the number of piezo-electric sheet 12 is one, also a plurality of piezo-electric sheets 12 can be set according to the size of structure, piezo-electric sheet is sticked at controlled body structure surface, and electric control device 13 comprises that electrical signal connects plug-in unit 21, full-wave bridge 22, signal conditioning circuit 23, peak value trigger circuit 24 and analog switch 25; Piezo-electric sheet 12 is sticked at controlled body structure surface, and output terminal is connected plug-in unit 21 with electrical signal in the electric control device 13 and is connected; Electrical signal connects plug-in unit 21 output terminals and is connected with rectifier bridge input end 22, rectifier bridge 22 output terminals are connected with signal conditioning circuit 23 input ends, the output terminal of signal conditioning circuit 23 is connected with the input end of peak value trigger circuit 24, the output terminal of peak value trigger circuit 24 is connected with the control end of analog switch 25, and two ends 25b, the 25c of analog switch 25 is connected with the output terminal of rectifier bridge 22.Particular circuit configurations is as follows: electric control device 13 comprises that electrical signal connects plug-in unit 21, by the first diode D31, the second diode D32, the 3rd diode D33, the full-wave bridge 22 that the 4th diode D34 forms, by first resistance R 31, second resistance R 32, the signal conditioning circuit 23 that the 3rd resistance R 33 and first capacitor C 31 are formed, by the first triode T31, peak value trigger circuit 24 that the second triode T32 and the 4th resistance R 34 are formed and the analog switch of forming by the 3rd triode T33 25; First end that electrical signal connects plug-in unit 21 is connected with the positive pole of piezo-electric sheet 12 by lead 12a, and second end is connected with the negative pole of piezo-electric sheet 12 by lead 12b; Electrical signal connects first termination of plug-in unit 21 goes between the first diode D31 in the full-wave bridge 22, the second diode D32, and second termination is gone between the 3rd diode D33, the 4th diode D34; In the full-wave bridge 22, the anode of the first diode D31 is connected with the negative electrode of the second diode D32, the anode of the 3rd diode D33 is connected with the negative electrode of the 4th diode D34, the negative electrode of the first diode D31 is connected with the negative electrode of the 3rd diode D33, and the anode of the second diode D32 is connected with the anode of the 4th diode D34; In the signal conditioning circuit 23, first resistance R, 31 1 ends are connected with the negative electrode of the first diode D31, the other end connects by the anode of first capacitor C, 31 second diode D32, second resistance R, 32 1 ends are connected with the negative electrode of the first diode D31, and the other end is connected with the anode of the second diode D32 by the 3rd resistance R 33; In the peak value trigger circuit 24, the emitter of the first triode T31 inserts between first resistance R 31 and first capacitor C 31, collector electrode is connected with the anode of the second diode D32 by the 4th resistance R 34, its base stage is connected with the collector electrode of the second triode T32, the base stage of the second triode T32 is connected with the collector electrode of the first triode T31, and collector electrode inserts between second resistance R 32 and the 3rd resistance R 33; In the analog switch 25, the collector electrode of triode T33 is connected with the negative electrode of the first diode D31, and base stage is connected with the emitter of the second triode T32, and its emitter is connected with the anode of the second diode D32.
When vibration took place structure, piezoelectric element induced structural vibrations and produces induced voltage, and the voltage signal on the piezoelectric element is by behind the rectifier bridge, and negative half-wave upset is positive half-wave, was transferred to signal conditioning circuit through the voltage signal of over commutation.By the dividing potential drop in the signal conditioning circuit, time-delay, an original voltage signal is divided into two groups of voltage signals of being nursed one's health, and one has certain decay on amplitude, and another has had certain time-delay on phase place.These two groups of voltage signals are transferred to the peak value trigger circuit again, the comparison of the relative size by two signals, and the peak value trigger circuit generate a high level when piezoelectric element voltage reaches peak value, and control analog switch closure.Piezoelectric element the two poles of the earth were by short circuit when analog switch was closed, and the electric charge of accumulation closes in the moment quilt it on, thereby reaches catabiotic purpose.Because piezoelectric element constantly is converted into electric energy with structural vibrations mechanical energy, electric control device constantly falls the energy consumption that transforms on the piezoelectric element simultaneously, and the structural vibrations energy is constantly consumed, thereby makes vibration controlled.
Claims (1)
1. semi-automatic control device of passive structure vibration, comprise at least one piezo-electric sheet (12) that is sticked on structure to be controlled (11) surface, it is characterized in that, also comprise an electric control device (13), described electric control device (13) comprises that electrical signal connects plug-in unit (21), by first, second, third and fourth diode (the D31, D32, D33, D34) full-wave bridge of Zu Chenging (22), by first resistance (R31), second resistance (R32), the signal conditioning circuit (23) that the 3rd resistance (R33) and first electric capacity (C31) are formed, by first triode (T31), peak value trigger circuit (24) that second triode (T32) and the 4th resistance (R34) are formed and the analog switch of forming by the 3rd triode (T33) (25); First end that electrical signal connects plug-in unit (21) is connected with the positive terminal of piezo-electric sheet (12), and second end is connected with the negative pole of piezo-electric sheet (12); First end that electrical signal connects plug-in unit (21) also inserts between first diode (D31) in the full-wave bridge (22), second diode (D32), and second end also inserts between the 3rd diode (D33) and the 4th diode (D34); In the full-wave bridge (22), the anode of first diode (D31) is connected with the negative electrode of second diode (D32), the anode of the 3rd diode (D33) is connected with the negative electrode of the 4th diode (D34), the negative electrode of first diode (D31) is connected with the negative electrode of the 3rd diode (D33), and the anode of second diode (D32) is connected with the anode of the 4th diode (D34); In the signal conditioning circuit (23), first resistance (R31) end is connected with the negative electrode of first diode (D31), the other end is connected with the anode of second diode (D32) by first electric capacity (C31), second resistance (R32) end is connected with the negative electrode of first diode (D31), and the other end is connected with the anode of second diode (D32) by the 3rd resistance (R33); In the peak value trigger circuit (24), the emitter of first triode (T31) inserts between first resistance (R31) and first electric capacity (C31), collector electrode is connected with the anode of second diode (D32) by the 4th resistance (R34), base stage is connected with the collector electrode of second triode (T32), the base stage of second triode (T32) is connected with the collector electrode of first triode (T31), and second triode (T32) collector electrode inserts between second resistance (R32) and the 3rd resistance (R33); In the analog switch (25), the collector electrode of the 3rd triode (T33) is connected with the negative electrode of first diode (D31), and base stage is connected with the emitter of second triode (T32), and the 3rd triode (T33) emitter is connected with the anode of second diode (D32).
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| CN2008102429459A CN101451589B (en) | 2008-12-30 | 2008-12-30 | Semi-automatic control device of passive structure vibration |
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| CN2008102429459A CN101451589B (en) | 2008-12-30 | 2008-12-30 | Semi-automatic control device of passive structure vibration |
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| CN101451589B true CN101451589B (en) | 2010-08-18 |
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| TWI544162B (en) | 2013-08-05 | 2016-08-01 | 緯創資通股份有限公司 | Vibration suppressing apparatus and vibration suppressing method thereof |
| CN106248016A (en) * | 2016-09-06 | 2016-12-21 | 安徽理工大学 | A kind of coordinate machine gauge head oscillation damping method |
| CN109004862A (en) * | 2018-08-02 | 2018-12-14 | 湖南工业大学 | A kind of low latency self-powered piezo-electric generating synchronization charge-extraction circuit |
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