CN107132015A - A kind of vibration measurement of flexible board and control device and method - Google Patents
A kind of vibration measurement of flexible board and control device and method Download PDFInfo
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- CN107132015A CN107132015A CN201710458038.7A CN201710458038A CN107132015A CN 107132015 A CN107132015 A CN 107132015A CN 201710458038 A CN201710458038 A CN 201710458038A CN 107132015 A CN107132015 A CN 107132015A
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- 230000008447 perception Effects 0.000 claims abstract description 14
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- 238000006073 displacement reaction Methods 0.000 claims description 7
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
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Abstract
The invention discloses a kind of vibration measurement of flexible board and control device and method, the device includes vibrating device body, vibration perception system, vibration control system, signal processing module and industrial computer, the flexible board of vibrating device body is vertically fixed on experimental bench, two vibrators are parallel to be fixed on the side experimental bench of flexible board, and is connected respectively by vibrator push rod and flexible board；Multiple single-point laser vialogs of vibration perception system are arranged on the opposite side apart from flexible board certain distance, the vibration information of correspondence position point on flexible board is measured respectively, multiple piezoelectric acceleration transducers are fixed on the identical correspondence position point of flexible board, are located at the same side with vibrator；The multiple piezoelectric inertia drivers and piezoelectric acceleration transducer of vibration control system are fixed on the same position of the same side of flexible board.Described device has the advantages that sensitivity height, responsiveness are fast, can realize the accurate measurement and control to flexible panel vibration.
Description
Technical field
The present invention relates to flexible structure vibration measurement and control field, and in particular to one kind is based on multiple single-point laser vibration measurings
The flexible board vibration measurement of instrument and control device and method.
Background technology
In modern industry, machine is widely adopted as motive power, as machine is towards the side of high accuracy, high speed
To development, the control for vibration requires more and more higher.Dither can not only influence the operating accuracy of mechanical structure, can also make
Structure produces too early fatigue rupture, influences the service life of structure.Under this background, suppressing dither becomes one
Urgent problem to be solved.For example, the large-size pliable structure in spacecraft, aircraft, steamer, the flabellum of the large-scale windmill of generating,
The also structure such as satellite antenna can all produce dither at work, and some traditional vibration control methods have been difficult to meet
The vibration suppression of the higher and higher structure of accuracy and speed.The dither that flexible structure is produced is controlled, it is necessary to right
Flexible structure carries out dynamic tracking measurement, and Real-time Feedback is to suppress the vibration of flexible structure.In order to better control over vibration, no
But the accuracy of measurement is improved, also to accelerate the dynamic response rate of control, only in this way, the information of vibration could faster more
It is delivered to accurately in industrial computer, by corresponding algorithm, output control amount realizes instant shake into piezoelectric type actuator
Dynamic control.
In dither measurement and control system, the accuracy and speed of measurement is key therein.Traditional sensor connects
Touch vibration measuring method is, it is necessary to be attached to some sensors on the surface of testee, and not only line is complicated, it is also possible to because attached
Plus sensor mass changes the dynamic property of testee, so that measurement result is influenceed, and also contact type measurement sensor is often
Anti-interference is poor, is easily damaged, it is many in particular cases, such as hot environment, sensor can be affected and can not be just
Often work.The sensor of common contact type measurement vibration has piezoelectric ceramic piece and acceleration transducer.Using piezoelectric ceramic piece
During measurement vibration, because the problems such as multiple links such as signal amplification, filtering can cause signal delay and delayed phase, measuring speed
Slowly；Measured using acceleration transducer when vibrating, its resistance to outside interference is poor, to noise-sensitive, the precision of measurement by
To limitation.Contactless pair of measuring method has do not impacted to the dynamic property and normal work of measurand excellent
Point.Relatively common vibration contactless measurement is measuring method at present, including laser displacement sensor, Laser Measuring
The method such as Vibration Meter and machine vision.Wherein, laser vibration measurer has measurement accuracy high, fast response time, and strong interference immunity etc. is excellent
Point, is practical a, measuring method easily and effectively in current vibration measurement.
In control aspect, the type of drive of flexible structure vibration control has many kinds, and conventional has the drive of piezoelectric type actuator
Dynamic, motor driving, marmem driving etc..Piezoelectric type actuator uses the inverse piezoelectric effect of piezoceramic material, passes through
Control its mechanically deform to reach the effect of control vibration, it have response it is rapid, stably, advantages of simple structure and simple, but fragility compared with
Greatly, destruction is easily produced, so being relatively adapted to the less occasion of deformation ratio；Motor driving is readily available larger driving force, but
It is unstable, easily flexible structure is damaged；SME drastically occurs at a certain temperature, uses scope
It is restricted.In the present invention, using type of drive of the piezoelectric inertia driver as control.
The present invention is driven by the way of laser vibration measurer is as vibration measurement using piezoelectric type actuator as control,
It will be responded rapidly, surely with piezoceramic material the advantages of laser vibration measurer measurement accuracy is high, sample frequency is high, dynamic response is fast
Fixed, applied widely the advantages of, is combined, it is to avoid a variety of drawbacks of conventional vibration measurement and control, and such as measurement accuracy is low, rings
Answer speed slow, the shortcomings of error is big, the scope of application is narrow makes the vibration measurement and control of flexible board more accurately and quickly.
The content of the invention
The purpose of the present invention be for existing flexible structure vibration measurement and control technology shortcoming and deficiency there is provided
A kind of flexible board vibration measurement and control device based on multiple single-point laser vialogs, the device cause the precision of vibration measurement
Higher, faster, anti-interference is stronger for the control response of vibration, it is to avoid contact type measurement is caused to the quality of flexible board and surface
Influence so as to change its dynamic property the drawbacks of, allow flexible board vibration be quickly and stably returned to one it is hardly right
The scope that structure has undesirable effect, while the accuracy of vibration information collection and the instantaneity of feedback are take into account, using sharp
Flash ranging Vibration Meter and piezoelectric acceleration transducer are measured to vibration jointly, mutually amendment, are worked simultaneously, it is ensured that vibration information
It accurately can immediately be delivered to industrial computer, it is ensured that punctual, the accurate output of vibration control amount.
Another object of the present invention is to provide a kind of flexible board vibration measurement based on multiple single-point laser vialogs with
Control method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of flexible board vibration measurement and control device based on multiple single-point laser vialogs, including vibrating device sheet
Body, vibration perception system, vibration control system, signal processing module and industrial computer, the vibrating device body include soft
Property plate and vibrator, flexible board are vertically fixed on experimental bench, and two vibrators are fixed on flexibility by the way that pedestal is parallel
On the side experimental bench of plate, and connected respectively by vibrator push rod and flexible board, vertical direction close to flexible board fixation
End, in the horizontal direction close to the both sides of flexible board width；The vibration perception system includes multiple single-point laser vialogs
And piezoelectric acceleration transducer, it is arranged on for multiple single-point laser vialogs that non-contact measurement vibrates apart from flexible board
The opposite side of certain distance, the surface of emission of single-point laser vialog is parallel with flexible board, is fixed by laser vibration measurer support column
On experimental bench, the vibration information of correspondence position point on flexible board is measured respectively, the multiple piezoelectricity vibrated for contact type measurement
Formula acceleration transducer is fixed on the identical correspondence position point of flexible board, is located at the same side with vibrator；The vibration control
System includes multiple piezoelectric inertia drivers, and the multiple piezoelectric inertia driver and piezoelectric acceleration transducer are fixed on soft
The same position of the same side of property plate；The vibration information of vibration perception systematic survey vibrating device body, passes through signal transacting mould
Industrial computer is sent to after block processing, industrial computer controlled vibration control system to act later by respective handling, so that
Complete the measurement and control to flexible panel vibration.
Further, the signal processing module includes signal processor, A/D converter, charge amplifier, power amplification
Device, signal generator, piezoelectric amplifier and D/A converter.
Further, signal generator sends vibration signal, and two vibrators, two are sent to after amplifying through power amplifier
Individual vibrator encourages flexible panel vibration, during flexible panel vibration, single-point laser vialog by vibrator push rod respectively
In laser send laser, the reflected light that single-point laser vialog receives flexible board is simultaneously produced on a sensor with reference light convergence
Raw interference, interference signal carries the vibration displacement information of flexible board, and is input to signal processor, the letter of signal processor output
Data signal is generated after number being changed through A/D converter, the data signal obtains flexible panel vibration after being handled through industrial computer
Related data；After the signal of piezoelectric acceleration transducer is handled through charge amplifier, the signal of output is changed through A/D converter
After generate data signal, the data signal obtains the related data of flexible panel vibration after being handled through industrial computer；In the present apparatus
In, the measurement of flexible panel vibration related data is mainly completed by single-point laser vialog, the effect of piezoelectric acceleration transducer
It is to be mutually authenticated with the measurement result of single-point laser vialog.
Further, industrial computer is obtained after the related data of flexible panel vibration, is turned after respective handling by D/A
Parallel operation, then amplify signal via piezoelectric amplifier, apply control signals on piezoelectric inertia driver, drive piezoelectric inertia
Dynamic device produces corresponding controling power to suppress flexible board mode of flexural vibration and torsion mode vibration, single-point laser vialog and piezoelectric type
The vibration perception system of acceleration transducer composition is used for the vibration for measuring multiple single-points of flexible board, forms vibrational feedback letter
Number, vibrational feedback signal is used to control piezoelectric inertia driver to produce corresponding controling power after the processing of corresponding control algolithm
Suppress the vibration of flexible board.
Further, the quantity of the single-point laser vialog, the quantity of piezoelectric acceleration transducer and piezoelectricity are used
The quantity of property driver is identical.
Further, the quantity of the single-point laser vialog, the quantity of piezoelectric acceleration transducer and piezoelectricity are used
Property driver quantity all be five.
Further, the multiple piezoelectric inertia driver and multiple piezoelectric acceleration transducers pass through stud spiral shell respectively
Mother is mechanically anchored in the same position of the same side of flexible board, and the measurement point with single-point laser vialog on flexible board is relative
Should, wherein, piezoelectric inertia driver is close on flexible board, to ensure that the controling power that piezoelectric inertia driver is sent can be good
Ground is applied on flexible board to suppress the vibration of flexible board.
Further, the number and spread pattern energy of measurement point of the multiple single-point laser vialog on flexible board
The vibration information of enough flexible boards gone for according to the shape size of flexible board and gauger is come designed, designed.
Further, the piezoelectric inertia driver, piezoelectric acceleration transducer and two vibrators are located at flexibility
The same side of plate.
Further, described two vibrators encourage flexible board mode of flexural vibration to vibrate and reverse by vibrator push rod respectively
Modal vibration；When two vibrators are received with mode of flexural vibration frequency identical sinusoidal signal excitation, two vibrators press phase
With signal and phase it is identical excitation, then excitation produce flexible board flexural vibrations；When two vibrators are received and torsion mode
During frequency identical sinusoidal signal excitation, two vibrators are encouraged by identical signal and opposite in phase, then excitation produces flexible board
Twisting vibration.
Another object of the present invention can be achieved through the following technical solutions：
A kind of flexible board vibration measurement and control method based on multiple single-point laser vialogs, methods described include following
Step：
Step 1: signal generator sends vibration signal, two vibrators, two are sent to after amplifying through power amplifier
Vibrator encourages flexible panel vibration by vibrator push rod respectively, during flexible panel vibration, in single-point laser vialog
Laser send laser projection to flexible board, single-point laser vialog receive flexible board reflected light simultaneously with reference light converge
Interference is produced on a sensor, and interference signal carries the vibration displacement information of flexible board, and is input at signal processor, signal
The signal of reason device output generates data signal after being changed through A/D converter, and the data signal is obtained after being handled through industrial computer
The related data of flexible panel vibration；After the signal of piezoelectric acceleration transducer is handled through charge amplifier, the signal warp of output
Data signal is generated after A/D converter conversion, the data signal obtains the correlation of flexible panel vibration after being handled through industrial computer
Data；The measurement result of the measurement result of piezoelectric acceleration transducer and single-point laser vialog is mutually authenticated；
Step 2: industrial computer is obtained after the related data of flexible panel vibration, changed after respective handling by D/A
Device, then amplify signal via piezoelectric amplifier, apply control signals on piezoelectric inertia driver, drive piezoelectric inertia
Device produces corresponding controling power to suppress flexible board mode of flexural vibration and torsion mode vibration.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, flexible board vibration measurement of the invention and control device use multiple single-point laser vialogs, respectively to flexible board
Multiple single-points carry out vibration measurement, obtain multiple spot vibration information after comprehensive analysis monoblock flexible board Vibration Condition, single-point swash
Flash ranging Vibration Meter employs the mode of non-contact measurement to flexible board, it is to avoid to flexible board additional mass in contact type measurement
The situation for causing flexible board dynamic property to change.
2nd, flexibly, measured point can have multiple for flexible board vibration measurement of the invention and control device metering system, be tested
The also fixed limitation of the arrangement mode of point, the number and spread pattern of measured point can according to the shape size of flexible board with
And the vibration information of flexible board that gauger goes for carrys out designed, designed.
3rd, flexible board vibration measurement of the invention and control device use piezoelectric inertia driver, and it has control accuracy
Height, fast response time, driving force are big, the driving low advantage of speed, are suitable for high-precision, high speed in flexible board vibration control
It is required that, it is a kind of preferable driver in large-size pliable structure vibration control.
Brief description of the drawings
Fig. 1 is the flexible board vibration measurement of the embodiment of the present invention 1 and the general illustration of control device.
Fig. 2 is the flexible board vibration measurement of the embodiment of the present invention 1 and the top view of control device.
Fig. 3 is the flexible board vibration measurement of the embodiment of the present invention 1 and the front view of control device.
Fig. 4 is the distribution map of measured point on the flexible board of the embodiment of the present invention 1.
Fig. 5 is the scheme of installation of the piezoelectric inertia driver of the embodiment of the present invention 1 and piezoelectric acceleration transducer.
Wherein, 1- flexible boards, 2- vibrators, 3- vibrator push rods, 4- laser vibration measurer support columns, 5- single-point laser vibration measurings
Instrument, 6- piezoelectric acceleration transducers, 7- piezoelectric inertia drivers, 8- experimental benches, 9- signal processors, 10- power amplifiers,
11- piezoelectric amplifiers, 12-A/D converters, 13- signal generators, 14-D/A converters, 15- industrial computers, 16- electric charges are put
Big device.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Embodiment 1：
As shown in FIG. 1 to 3, a kind of flexible panel vibration based on multiple single-point laser vialogs is present embodiments provided to survey
Amount and control device, including vibrating device body, vibration perception system, vibration control system, signal processing module and industry control meter
Calculation machine (15), the vibrating device body includes flexible board (1) and vibrator (2), and the wherein size of flexible board (1) is 800mm
× 1000mm × 3mm, material uses epoxy resin composite material, is vertically fixed on experimental bench (8), two vibrators
(2) it is fixed on by the way that pedestal is parallel on the side experimental bench (8) of flexible board (1), at a distance of 560mm, and passes through vibrator top respectively
Bar (3) and flexible board (1) connection, vibrator push rod (3) long 300mm, vertical direction close to flexible board (1) fixing end,
Horizontal direction is close to the both sides of flexible board (1) width；The vibration perception system includes five single-point laser vialogs (5)
With piezoelectric acceleration transducer (6), distance is arranged on for five single-point laser vialogs (5) that non-contact measurement vibrates
Flexible board (1) about 630mm opposite side, the surface of emission of single-point laser vialog (5) is parallel with flexible board (1), passes through Laser Measuring
Vibration Meter support column (4) is fixed on experimental bench (8), the vibration information of correspondence position point on flexible board (1) is measured respectively, for connecing
Five piezoelectric acceleration transducers (6) of touch measurement vibration are fixed on the identical correspondence position point of flexible board (1), with swashing
The device (2) that shakes is located at the same side；The distribution map of correspondence measured position point is as shown in figure 4, the vibration control system on flexible board (1)
Including five piezoelectric inertia drivers (7), five piezoelectric inertia drivers (7) and piezoelectric acceleration transducer (6) are solid
It is scheduled on the same position of the same side of flexible board (1)；The vibration information of vibration perception systematic survey vibrating device body, passes through letter
Industrial computer (15) is sent to after the processing of number processing module, industrial computer (15) controls vibration to control later by respective handling
System acting processed, so as to complete the measurement and control vibrated to flexible board (1).
Wherein, the signal processing module include signal processor (9), A/D converter (12), charge amplifier (16),
Power amplifier (10), signal generator (13), piezoelectric amplifier (11) and D/A converter (14).Signal generator (13) is sent out
Go out vibration signal, two vibrators (2) are sent to after amplifying through power amplifier (10), two vibrators (2) are respectively by swashing
The device push rod (3) that shakes excitation flexible board (1) vibration, during flexible board (1) vibrates, swashing in single-point laser vialog (5)
Light device sends laser, and single-point laser vialog (5) receives the reflected light of flexible board (1) and produced on a sensor with reference light convergence
Raw interference, interference signal carries the vibration displacement information of flexible board (1), and is input to signal processor (9), signal processor
(9) signal of output generates data signal after being changed through A/D converter (12), and the data signal is handled through industrial computer (15)
The related data of flexible board (1) vibration is obtained afterwards；The signal of piezoelectric acceleration transducer (6) is handled through charge amplifier (16)
Afterwards, the signal of output generates data signal after being changed through A/D converter (12), and the data signal is handled through industrial computer (15)
The related data of flexible board (1) vibration is obtained afterwards；In the present apparatus, the measurement of flexible board (1) vibration related data is main by list
Dot laser vialog (5) is completed, and the effect of piezoelectric acceleration transducer (6) is the measurement knot with single-point laser vialog (5)
Fruit is mutually authenticated.Industrial computer (15) is obtained after the related data of flexible board (1) vibration, passes through D/A after respective handling
Converter (14), then amplify signal via piezoelectric amplifier (11), apply control signals to piezoelectric inertia driver (7)
On, make piezoelectric inertia driver (7) produce corresponding controling power to suppress flexible board (1) mode of flexural vibration and torsion mode vibration,
The vibration perception system of single-point laser vialog (5) and piezoelectric acceleration transducer (6) composition is used to measure flexible board (1)
The vibration of multiple single-points, forms vibrational feedback signal, and vibrational feedback signal is used to control after the processing of corresponding control algolithm
Piezoelectric inertia driver (7) produces the vibration that corresponding controling power suppresses flexible board (1).
Wherein, scheme of installation such as Fig. 5 institutes of the piezoelectric inertia driver (7) and piezoelectric acceleration transducer (6)
Show, be mechanically anchored in the same position of the same side of flexible board (1) by stud nut respectively, and with single-point laser vialog
(5) measurement point on flexible board (1) is corresponding, wherein, piezoelectric inertia driver (7) is close on flexible board (1), to ensure
The controling power that piezoelectric inertia driver (7) is sent can be applied on flexible board (1) to suppress shaking for flexible board (1) well
It is dynamic.
Wherein, the number and spread pattern of measurement point of the single-point laser vialog (5) on flexible board (1) can
The vibration information of the flexible board (1) gone for according to the shape size of flexible board (1) and gauger is come designed, designed.It is described
What the number and installation site of vibrator (2) can also be gone for according to the shape size and gauger of flexible board (1)
The vibration information of flexible board (1) carrys out designed, designed.
Wherein, the piezoelectric inertia driver (7), piezoelectric acceleration transducer (6) and two vibrators (2) are located at
The same side of flexible board (1).
Further, described two vibrators (2) encourage flexible board (1) mode of flexural vibration by vibrator push rod (3) respectively
Vibration and torsion mode vibration；When two vibrators (2) are received with mode of flexural vibration frequency identical sinusoidal signal excitation, two
Individual vibrator (2) presses identical signal and the identical excitation of phase, then excitation produces the flexural vibrations of flexible board (1)；When two excitings
When device (2) is received with Torsion mode frequency identical sinusoidal signal excitation, two vibrators (2) press identical signal and phase phase
Flyback is encouraged, then excitation produces the twisting vibration of flexible board (1).
In the present embodiment, the vibrator for the model JZK-50 that vibrator (2) is produced from GST companies of the U.S., this swashs
The maximum exciting force of the device that shakes is 500N, and peak swing is ± 12.5mm, and peak acceleration is 55g, and maximum input current is 30Arms,
Frequency range is DC-2k, and appearance and size is Φ 240mm × 345mm, and the way of output is to transmit power to flexible board by vibrator push rod
(1) on.The material that flexible board (1) is used is to use epoxy resin composite material, and size is 800mm × 1000mm × 3mm.Experiment
Platform (8) surface uses porous form, meets different devices and fixes requirement.Single-point laser vialog (5) is from Shun Yu companies
The model LV-S01 of production single-point laser vialog, object shaking along laser direction is measured using laser Doppler principle
Move, it uses contactless measurement, with functions, target measurement distance such as automatic focusing, long-range focusing and focusing storages
Between 0.35m~20m, equipment interference is strong, installs simple and fast, it is adaptable to which various measuring environments, its operating temperature is 3
DEG C between 45 DEG C, power supply uses 220~240Vrms, 50~60Hz, and type of laser is He-Ne laser, and wavelength is
632.8nm, frequency range is DC~25KHz, and velocity resolution is 1 μm/s, and maximum linear error is 1.00%, and product size is
67mm × 380mm × 159mm, is supported the use with control cabinet.Piezoelectric acceleration transducer (6) is from kistler companies of Germany
The model 8688A of production piezoelectric acceleration transducer, acceleration analysis scope is ± 50g, and sensitivity is 100mV/g,
Frequency response is 0.5~5000Hz, and operating temperature is between -40 degrees Celsius to 65 degrees Celsius, and input voltage is 22~30VDC,
Input dc power is 2~6mA, and largest random vibration is 100grms.Piezoelectric inertia driver (7) is from PCB companies of the U.S.
The piezoelectric type inertia starter of 712 series.Power amplifier (10) uses the model 50WD1000 of AR companies of U.S. power
Amplifier, working frequency is DC~1000MHz.Piezoelectric amplifier (11) is amplified using model APEX-PA241DW piezoelectricity
Device, output type is CMOS, and switching rate is 30V/ μ s, and voltage gain is 96dB.A/D converter (12) is public using Intersil
The model HI5812 of department A/D converter, digit is 12, and speed is 0.05MSPS, and output area is 0~5V.D/A converter
(14) the model ISL5861 of Intersil companies D/A converter is used, digit is 12, and speed is 210MSPS, work electricity
Press as 3.3V.
Embodiment 2：
Present embodiments provide a kind of flexible board vibration measurement based on multiple single-point laser vialogs and control method, institute
The method of stating comprises the following steps：
Step 1: signal generator (13) sends vibration signal, two are sent to after amplifying through power amplifier (10) and is swashed
Shake device (2), and two vibrators (2) encourage flexible board (1) to vibrate by vibrator push rod (3) respectively, are vibrated in flexible board (1)
During, the laser in single-point laser vialog (5) sends laser, and single-point laser vialog (5) receives the anti-of flexible board (1)
Penetrate light and produce interference on a sensor with reference light convergence, interference signal carries the vibration displacement information of flexible board (1), and defeated
Enter to signal processor (9), the signal that signal processor (9) is exported generates data signal after being changed through A/D converter (12), should
Data signal obtains the related data of flexible board (1) vibration after being handled through industrial computer (15)；Piezoelectric acceleration transducer
(6) after signal is handled through charge amplifier (16), the signal of output generates data signal after being changed through A/D converter (12),
The data signal obtains the related data of flexible board (1) vibration after being handled through industrial computer (15)；Piezoelectric type acceleration is passed
The measurement result of sensor (6) and the measurement result of single-point laser vialog (5) are mutually authenticated；
Step 2: industrial computer (15) is obtained after the related data of flexible board (1) vibration, pass through after respective handling
D/A converter (14), then amplify signal via piezoelectric amplifier (11), apply control signals to piezoelectric inertia driver
(7) on, piezoelectric inertia driver (7) is produced corresponding controling power and shaken to suppress flexible board (1) mode of flexural vibration and torsion mode
It is dynamic.
In addition, in flexible board vibration processes, it may be considered that show phase in real time by the interpersonal interactive interface for designing friendly
Measurement signal and control signal performance graph are closed, is easy to model analysis and the control effect of the flexible panel vibration of real-time monitored, control
The modification input of various parameters and data preservation etc., are easy to debugging in real time and analyze.
It is described above, it is only patent preferred embodiment of the present invention, but the protection domain of patent of the present invention is not limited to
This, any one skilled in the art is in the scope disclosed in patent of the present invention, according to the skill of patent of the present invention
Art scheme and its patent of invention design are subject to equivalent substitution or change, belong to the protection domain of patent of the present invention.
Claims (10)
1. a kind of flexible board vibration measurement and control device based on multiple single-point laser vialogs, it is characterised in that：Including shaking
Dynamic device body, vibration perception system, vibration control system, signal processing module and industrial computer, the vibrating device sheet
Body includes flexible board and vibrator, and flexible board is vertically fixed on experimental bench, and two vibrators are parallel solid by pedestal
It is scheduled on the side experimental bench of flexible board, and is connected respectively by vibrator push rod and flexible board, in vertical direction close to flexible
The fixing end of plate, in the horizontal direction close to the both sides of flexible board width；The vibration perception system swashs including multiple single-points
Flash ranging Vibration Meter and piezoelectric acceleration transducer, for non-contact measurement vibrate multiple single-point laser vialogs be arranged on away from
From the opposite side with a certain distance from flexible board, the surface of emission of single-point laser vialog is parallel with flexible board, passes through laser vibration measurer branch
Dagger is fixed on experimental bench, and the vibration information of correspondence position point on flexible board is measured respectively, is vibrated for contact type measurement
Multiple piezoelectric acceleration transducers are fixed on the identical correspondence position point of flexible board, are located at the same side with vibrator；It is described
Vibration control system includes multiple piezoelectric inertia drivers, the multiple piezoelectric inertia driver and piezoelectric acceleration transducer
It is fixed on the same position of the same side of flexible board；The vibration information of vibration perception systematic survey vibrating device body, passes through letter
Industrial computer is sent to after the processing of number processing module, industrial computer controlled vibration control system dynamic later by respective handling
Make, so as to complete the measurement to flexible panel vibration and control.
2. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 1 is filled with control
Put, it is characterised in that：The signal processing module include signal processor, A/D converter, charge amplifier, power amplifier,
Signal generator, piezoelectric amplifier and D/A converter.
3. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 2 is filled with control
Put, it is characterised in that：Signal generator sends vibration signal, and two vibrators, two are sent to after amplifying through power amplifier
Vibrator encourages flexible panel vibration by vibrator push rod respectively, during flexible panel vibration, in single-point laser vialog
Laser send laser, the reflected light that single-point laser vialog receives flexible board is simultaneously produced on a sensor with reference light convergence
Interference, interference signal carries the vibration displacement information of flexible board, and is input to signal processor, the signal of signal processor output
Data signal is generated after being changed through A/D converter, the data signal obtains the phase of flexible panel vibration after being handled through industrial computer
Close data；After the signal of piezoelectric acceleration transducer is handled through charge amplifier, after the signal of output is changed through A/D converter
Data signal is generated, the data signal obtains the related data of flexible panel vibration after being handled through industrial computer；In the present apparatus,
The measurement of flexible panel vibration related data is mainly completed by single-point laser vialog, the effect of piezoelectric acceleration transducer be with
The measurement result of single-point laser vialog is mutually authenticated.
4. a kind of flexible board vibration measurement based on multiple single-point laser vialogs and control according to Claims 2 or 3
Device, it is characterised in that：Industrial computer is obtained after the related data of flexible panel vibration, is turned after respective handling by D/A
Parallel operation, then amplify signal via piezoelectric amplifier, apply control signals on piezoelectric inertia driver, drive piezoelectric inertia
Dynamic device produces corresponding controling power to suppress flexible board mode of flexural vibration and torsion mode vibration, single-point laser vialog and piezoelectric type
The vibration perception system of acceleration transducer composition is used for the vibration for measuring multiple single-points of flexible board, forms vibrational feedback letter
Number, vibrational feedback signal is used to control piezoelectric inertia driver to produce corresponding controling power after the processing of corresponding control algolithm
Suppress the vibration of flexible board.
5. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 1 is filled with control
Put, it is characterised in that：Quantity, the quantity of piezoelectric acceleration transducer and the piezoelectric inertia of the single-point laser vialog drive
The quantity of dynamic device is identical, and the number and spread pattern of measurement point of the multiple single-point laser vialog on flexible board can
The vibration information of the flexible board gone for according to the shape size of flexible board and gauger is come designed, designed.
6. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 1 is filled with control
Put, it is characterised in that：The multiple piezoelectric inertia driver and multiple piezoelectric acceleration transducers pass through stud nut respectively
The same position of the same side of flexible board is mechanically anchored in, and the measurement point with single-point laser vialog on flexible board is relative
Should, wherein, piezoelectric inertia driver is close on flexible board, to ensure that the controling power that piezoelectric inertia driver is sent can be good
Ground is applied on flexible board to suppress the vibration of flexible board.
7. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 1 is filled with control
Put, it is characterised in that：The piezoelectric inertia driver, piezoelectric acceleration transducer and two vibrators are located at flexible board
The same side.
8. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 1 is filled with control
Put, it is characterised in that：Described two vibrators encourage flexible board mode of flexural vibration to vibrate and reverse mould by vibrator push rod respectively
State is vibrated；When two vibrators are received with mode of flexural vibration frequency identical sinusoidal signal excitation, two vibrators are by identical
Signal and the identical excitation of phase, then excitation produce the flexural vibrations of flexible board；When two vibrators are received and torsion mode frequency
During rate identical sinusoidal signal excitation, two vibrators are encouraged by identical signal and opposite in phase, then excitation produces flexible board
Twisting vibration.
9. a kind of flexible board vibration measurement based on multiple single-point laser vialogs according to claim 1 is filled with control
Put, it is characterised in that：The number and installation site of the vibrator can be according to flexible board shape size and gauger
The vibration information of the flexible board gone for carrys out designed, designed.
10. a kind of flexible board vibration measurement and control method based on multiple single-point laser vialogs, it is characterised in that the side
Method comprises the following steps：
Step 1: signal generator sends vibration signal, two vibrators, two excitings are sent to after amplifying through power amplifier
Device encourages flexible panel vibration by vibrator push rod respectively, during flexible panel vibration, swashing in single-point laser vialog
Light device sends laser projection to flexible board, and single-point laser vialog receives the reflected light of flexible board and converges in biography with reference light
Interference is produced on sensor, interference signal carries the vibration displacement information of flexible board, and is input to signal processor, signal processor
The signal of output generates data signal after being changed through A/D converter, and the data signal obtains flexibility after being handled through industrial computer
The related data of panel vibration；After the signal of piezoelectric acceleration transducer is handled through charge amplifier, the signal of output turns through A/D
Data signal is generated after parallel operation conversion, the data signal obtains the related data of flexible panel vibration after being handled through industrial computer；
The measurement result of the measurement result of piezoelectric acceleration transducer and single-point laser vialog is mutually authenticated；
Step 2: industrial computer is obtained after the related data of flexible panel vibration, by D/A converter after respective handling,
Signal is amplified via piezoelectric amplifier again, applied control signals on piezoelectric inertia driver, makes piezoelectric inertia driver
Corresponding controling power is produced to suppress flexible board mode of flexural vibration and torsion mode vibration.
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| CN114137073B (en) * | 2021-11-22 | 2024-01-26 | 吉林大学 | Device and method for measuring response of solid medium to ultrasonic vibration excitation |
| CN114137073A (en) * | 2021-11-22 | 2022-03-04 | 吉林大学 | Device and method for measuring excitation response of solid medium to ultrasonic frequency vibration |
| CN115047215B (en) * | 2022-02-18 | 2023-03-21 | 太原理工大学 | Triaxial vibration acceleration signal coupling correction detection system and method |
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