CN209945667U - Multi-flexible piezoelectric beam coupling vibration analysis control device - Google Patents
Multi-flexible piezoelectric beam coupling vibration analysis control device Download PDFInfo
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- CN209945667U CN209945667U CN201920788764.XU CN201920788764U CN209945667U CN 209945667 U CN209945667 U CN 209945667U CN 201920788764 U CN201920788764 U CN 201920788764U CN 209945667 U CN209945667 U CN 209945667U
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Abstract
The utility model discloses a multi-flexible piezoelectric beam coupling vibration analysis control device, which comprises an excitation part, a flexible piezoelectric beam part, a detection part and a control part; the excitation part comprises a servo motor, a speed reducer, a connecting rod, a sliding block, a first guide rail, a telescopic rod and a supporting seat; the flexible piezoelectric beam part comprises at least one flexible beam module, the detection part detects a vibration signal of the flexible beam to obtain a control signal, and the control part is started to inhibit the vibration of the flexible beam. The utility model discloses utilize the information that camera and various sensors gathered, the computer is through certain algorithm, and output control signal suppresses the vibration of flexible roof beam. The device modularizes the flexible beam, can freely adjust the mass and the spring stiffness, and measures the vibration characteristic.
Description
Technical Field
The utility model relates to a flexible piezoelectric beam coupling vibration control field, concretely relates to many flexible piezoelectric beam coupling vibration analysis and control device.
Background
The flexible structure is widely applied in the fields of aerospace and industrial production, and has the advantages of light weight, low energy consumption, high efficiency, flexible operation and the like compared with a rigid structure, but the application and the development of the flexible structure in certain fields are limited due to the characteristics of low natural frequency, easy excitation of low-frequency modal vibration and the like of the flexible structure. The vibration characteristics and active control of multiple flexible beam coupling have been the focus and hot spot of world research.
In the prior art, the use of piezoelectric fiber composites (MFCs) is an innovative low-cost piezoelectric device designed by the american space agency. MFCs have ultra-thin piezoelectric actuators and sensors that provide high performance, flexibility, and reliability as sensors, and are cost competitive. MFCs have found wide application in controlling vibration, noise and deflection in composite structures.
The servo motor has the advantages of high control precision, quick response, wide speed regulation range, good dynamic characteristic, simple and convenient operation, capability of positioning and servo and the like. The servo motor driver is utilized to control the rotation frequency of the servo motor, signals in different forms are produced, and the vibration characteristic of the multi-flexible-beam coupling structure is researched.
Due to the fact that the mass of the flexible beams, the rigidity of the springs and the number of the flexible beams in the experiment are different in each experiment, a large amount of time and energy are needed for building the experiment platform. Therefore, the multi-flexible beam structure is modularized, and the experiment platform with different parameters can be quickly and freely built.
SUMMERY OF THE UTILITY MODEL
In order to overcome the shortcoming and the deficiency that prior art exists, the utility model provides a many flexible piezoelectric beam coupling vibration analysis and control device realizes many flexible beam coupling vibration analysis and control.
The utility model adopts the following technical scheme:
a multi-flexible piezoelectric beam coupling vibration analysis control device comprises an excitation part, a flexible piezoelectric beam part, a detection part and a control part;
the excitation part comprises a servo motor, a speed reducer, a connecting rod, a sliding block, a first guide rail, a telescopic rod and a supporting seat;
the supporting seat is installed on the experiment table, the servo motor, the speed reducer and the first guide rail are installed on the supporting seat, the output end of the speed reducer is connected with one end of the connecting rod through a flange, the other end of the connecting rod is connected with the sliding block, the telescopic rod is hinged to the sliding block, the tail end of the telescopic rod is connected with the flexible piezoelectric beam part, the sliding block slides on the first guide rail, the servo motor drives the flange to rotate through speed reduction of the speed reducer, the sliding block is driven to move back and forth, and excitation is generated;
the flexible piezoelectric beam part comprises at least one flexible beam module, the flexible beam module comprises a second guide rail, a sliding base and a flexible beam, the sliding base slides on the second guide rail, one end of the flexible beam is fixed on the sliding base, the end is a fixed end, the other end is a free end, the free end is provided with a mass block, and the at least one flexible beam module is arranged in parallel;
the detection part detects the vibration signal of the flexible beam to obtain a control signal, and the control part is started to inhibit the vibration of the flexible beam.
The detection part comprises a high-speed camera, an acceleration sensor and a piezoelectric fiber sensor;
the high-speed camera is arranged above the flexible beam through the fixed rod, the flexible beam is in the visual field range of the high-speed camera, and the high-speed camera shoots pictures containing the flexible beam and inputs the pictures into the computer;
the acceleration sensor is arranged on the flexible beam, detects a vibration signal of the flexible beam, amplifies the vibration signal by the charge amplifier, and transmits the vibration signal to the motion control card through the terminal board, and the motion control card is connected with the computer;
the piezoelectric fiber sensor is arranged on the flexible beam, detects a vibration signal of the flexible beam, amplifies the vibration signal by the charge amplifier, and transmits the vibration signal to the motion control card through the terminal board, and the motion control card is connected with a computer.
The control part comprises a servo motor driver, a piezoelectric fiber actuator and a piezoelectric fiber piece controller,
the computer generates a corresponding control signal according to a required excitation signal, inputs the control signal into the motion control card, inputs the control signal into the servo motor driver through the terminal board and drives the servo motor;
the computer generates a corresponding control signal according to the acquired vibration signal, inputs the control signal into the motion control card, transmits the control signal to the piezoelectric fiber sheet controller through the terminal board, drives the piezoelectric fiber actuator and inhibits the vibration of the flexible beam.
The utility model discloses in, when flexible roof beam module number is greater than one, through spring coupling between the adjacent flexible roof beam module.
The adjacent flexible beam modules are connected through springs, specifically, spring piece fixing springs are mounted on mass blocks of the flexible beams, the adjacent flexible beams are connected through the springs, one flexible beam is connected with the tail end of the telescopic rod, and the other flexible beam is connected with the wall plate through the springs.
The utility model discloses in, the number of the last piezoelectric fiber sensor of every flexible roof beam is 2, pastes in the centre department apart from stiff end 250mm, and positive and negative two sides are pasted, and the gesture is 0.
The utility model discloses in, the number of the acceleration sensor on every flexible roof beam is 2, and the position is in the centre department apart from free end 70mm, and positive and negative two sides are pasted.
The utility model discloses in, the number of the last piezoelectric fiber actuator of every flexible beam is 2, pastes in the centre department apart from stiff end 100mm, and positive and negative two sides are pasted, and the gesture is 0.
The utility model discloses still include the display.
The utility model has the advantages that:
1) the utility model discloses a multi-flexible piezoelectric beam coupling vibration analysis and control device and method modularizes parts, can freely combine the multi-flexible piezoelectric beam coupling structure with self-determined mass and rigidity;
2) the utility model adopts the freely adjustable structural components such as the guide rail slide block, the telescopic rod, the universal joint and the like, so that the building of the experiment table is faster and smoother;
3) the utility model adopts a multi-sensor system, and can study the vibration of the multi-flexible piezoelectric beam coupling structure through multi-sensor information fusion;
4) the utility model discloses in adopt novel piezoelectric fiber combined material, its flexibility is good, the deformation is big and drive the reinforce, the quality is little.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a right side view of FIG. 1;
fig. 5 is a front view of a flexible piezoelectric beam module.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
Examples
As shown in fig. 1 to 5, a multi-flexible piezoelectric beam coupled vibration analysis control device includes an excitation portion, a flexible piezoelectric beam portion, a detection portion, and a control portion;
the excitation part comprises a servo motor 1, a speed reducer 2, a flange 4, a connecting rod 15, a sliding block 17, a first guide rail 16, an expansion rod 18, a universal joint 19, an edge connecting block 14 and a supporting seat 3;
the supporting seat 3 is arranged on the experiment table 5, and a servo motor 1, a speed reducer 2 and a first guide rail are arranged on the supporting seat; the flange 4 is fixed at the output end of the speed reducer 2 and is connected with a connecting rod 15, and the connecting rod 15 is connected with a sliding block 17 and the flange 4; the telescopic rod 18 is hinged on the sliding block 17, and the tail end of the telescopic rod is connected with a universal joint 19; the other end of the universal joint 19 is connected with the edge connecting block 14; the edge connecting block 14 is fixed on the flexible beam;
the servo motor 1 is decelerated through the speed reducer 2 to drive the flange 4 to rotate, so that the sliding block 17 moves back and forth to generate excitation.
The flexible piezoelectric beam part comprises at least one flexible beam module, the flexible beam module comprises a second guide rail 6, a sliding base 7, a fixing plate 8, a fixing block 9, a fixing rod 10, a camera holder 25, a flexible beam 27, a mass block 21, a spring leaf 22, a spring 20 and a wall plate 23, the mass block can be arranged on one surface of the flexible beam, the two surfaces of the flexible beam can be symmetrically arranged, and the flexible beam module is determined according to actual needs;
the second guide rail 6 is arranged on the experiment table, and a sliding base 7 is arranged on the second guide rail; the fixed plate 8 is fixed on the sliding base 7 through screws, and the fixed plate 8 is provided with a fixed block 9 and a fixed rod 10 which are connected through bolts; a camera pan-tilt 25 is arranged on the fixed rod; the camera pan-tilt 25 is provided with a high-speed camera 26 which can move freely; the fixed block 9 is provided with a flexible beam 27 which is connected with the fixed plate through a bolt, the connecting end of the flexible beam 27 and the fixed plate is called a fixed end, the other end of the flexible beam is a free end, and the free end is provided with a mass block which is connected through a bolt; the mass block 21 is provided with a spring piece 22 or an edge connecting block 14; the spring piece 22 is used for fixing the spring 20; the flexible piezoelectric beam modules are connected by springs 20, one of which is connected to a wall plate 23.
The flexible beam is modularized, the mass block 21 can be freely replaced, and different masses can be selected; the spring 20 can be freely replaced and different stiffness can be selected.
In this embodiment, there are three flexible beam modules, and the three flexible beam modules are vertically arranged on the experiment table and arranged in parallel. The three second guide rails are arranged end to end, the free ends of the three adjacent flexible beams are connected through springs, the flexible beam positioned in the front is connected with the tail end of the telescopic rod through an edge connecting block, the flexible beam positioned at the tail is connected with the flexible beam at the middle point through a spring in the front, and the reverse side is connected with the wall plate through a spring.
The detection part comprises a high-speed camera, a piezoelectric fiber sensor 12 and an acceleration sensor 13, wherein two piezoelectric fiber sensors are mounted on each flexible beam and are attached to the middle of a fixed end 250mm away, namely the transverse center line position, and the posture is 0 degree.
The number of the acceleration sensors 13 on each flexible beam 27 is 2, and the position is at the middle of 70mm from the free end, i.e., the transverse centerline position.
Shooting the flexible beam 27 by using the high-speed camera 26, and transmitting the shot to the computer 33 through a USB3.0 interface; processing the vibration information of the flexible beam 27 through an algorithm in the computer 33; using the self-characteristics of the acceleration sensor 13, the generated electric signal is amplified by the charge amplifier 28, transmitted to the motion control card 32 through the terminal board 30, transmitted to the computer 33 through the a/D conversion port of the motion control card 32, and processed by the computer 33 to obtain the vibration information of the flexible beam 27; using the characteristics of the piezoelectric fiber sensor 12 itself, it is amplified by the charge amplifier 28, transmitted to the motion control card 32 through the terminal board 30, converted by its a/D conversion port, and then transmitted to the computer 33 for processing.
The control part comprises piezoelectric fiber actuators 11, the number of the piezoelectric fiber actuators 11 on each flexible beam 27 is 2, the piezoelectric fiber actuators are pasted in the middle of 100mm away from the fixed end, and the posture is 0 degree.
The computer controls the servo motor 1 by: the computer 33 generates a corresponding control signal according to a required excitation signal, inputs the control signal to the motion control card 32, is converted by a D/A module, passes through the terminal board 30, and inputs the control signal to the servo motor driver 29, and generates corresponding control on the servo motor 1 by adopting a position control mode or a speed control mode;
the computer controls the piezoelectric fiber actuator 11 by: the computer 33 generates corresponding control signals through the collected signals by a certain algorithm, inputs the control signals to the motion control card 32, converts the control signals by a D/A module, transmits the control signals through the terminal board 30, amplifies the control signals by the piezoelectric fiber sheet controller 31, and outputs the control signals to the piezoelectric fiber actuator 11, so that the vibration of the flexible hinged plate can be inhibited.
The utility model discloses a control process specifically as follows:
the first step is as follows: assembling a test bench: mounting all the flexible piezoelectric beam modules on a guide rail II 6; then required springs 20, spring pieces 22, mass blocks 21 and flexible beams 27 are arranged on corresponding beam modules, and the number of the beam modules can be determined according to the requirements; the spring pieces 22 and the wall plates 23 are connected, and the edge connecting block 14 is arranged on the flexible piezoelectric beam module closest to the motor; the high speed camera 26 is adjusted and placed; then, the slide block 17 is adjusted through the servo motor 1 so that the slide block 17 is in the middle position; finally, the telescopic rod 18 is adjusted to be connected with the edge connecting block 14;
the second step is that: calibrating the high-speed camera; placing a thin calibration card at the edge of the flexible plate; determining internal and external parameters of the high-speed camera 26;
the third step: using the computer 33 to generate a control signal, controlling the servo motor 1 through the motion control card 32 and the servo motor driver 29, and generating a corresponding excitation signal;
the fourth step: the computer 33 obtains the vibration information of each flexible beam 27 from the high-speed camera 26, the piezoelectric fiber sensor 12 and the acceleration sensor 13; visualization is realized through OpenGL software and displayed on the display 34;
the fifth step: a certain algorithm is adopted, corresponding control quantity is produced through a computer 33, and the control quantity acts on the piezoelectric fiber actuator 11 through a motion control card 32 and a piezoelectric fiber piece controller 31 to restrain the flexible board;
and a sixth step: and returning to the third step by changing the control parameters, and repeating the test to obtain a plurality of test results to obtain the vibration characteristics and the control effect of the multi-flexible moving beam.
The flexible beam 27 may be made of a thin plate of epoxy material with a geometry of 800mm x 200mm x 3 mm. The elastic modulus of the epoxy resin is Ep34.64GPa, and p 1840kg/m3。
The experiment table 5 is assembled by three aluminum profiles with the lengths of 1180mm, 1200mm and 500mm respectively, and the table top is a stainless steel plate with the lengths of 1320mm multiplied by 1300mm multiplied by 10 mm; the steel plate is connected with the section bar through screws, and each connecting part of the section bar is fixed by angle iron.
The first guide rail 16 and the second guide rail 6 are guide rails of the THK company, and have models of SGR10 and SGR 25. The sliding block 17 and the sliding base 7 are sliding blocks matched with THK company, and the models are SGB10 and SGB 25.
The servo motor 1 adopts Anchuan SGM7A-02A _ A6C, the diameter of a rotating shaft is 14mm, the power is 200W, and the rated voltage is AC 200V; the servo motor driver 29 is an Anchuan servo motor driver with the model number of SGM7S-1R 6A. The planetary reducer 2 is a German Neugart reducer, the model number of which is PLFE 064-005-SSSE 3AD-R14, and the reduction ratio is 5.
The piezoelectric fiber sensor 17 is M5628-P2 from MINGTIAN, and has a geometric size of 66mm × 31mm × 0.3 mm. The acceleration sensor 14 is a capacitance type piezoelectric sensor with the model number of 8315A030AC manufactured by Kistler company, the sensitivity is 133.33mV/g, the measurement range is-30 g to +30g, and the measurement frequency range is 0-1000 Hz. The charge amplifier 21 is a YE5850 charge amplifier of Jiangsu Union energy electronics, Inc.
The high speed camera 26 is a Basler camera model acA640-120um, 30 ten thousand pixels, and has a frame rate of 120 frames/second. The Lens 24 is made of Basler Lens C125-0618-5M F1.8f6mm, has a focal length of 6mm and a size of 14.5mm × 38.7 mm.
The motion control card 23 selects DMC-2x00 digital motion controller produced by GALIL corporation in America, and provides standard PCI bus interface; the CPU model of the selected computer 33 is Pentium G6202.6 GHz. And the memory 4G is provided with a PCI slot in the mainboard and can be provided with a motion control card. Display 28 is implemented using display VA249 HE.
The piezoelectric fiber actuator 11 is made of M5628-P1 of Summian corporation, and has a geometric size of 67mm x 37mm x 0.3 mm. The piezoelectric fiber sheet controller 31 adopts four HVA1500/50-4 channels of the Mingtian Corp, the power supply voltage is 220VAC, the bandwidth is 10kHz, the amplification factor is 200, namely the input voltage is-2.5V-7.5V, and the output voltage is-500V-1500V.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (9)
1. A multi-flexible piezoelectric beam coupling vibration analysis control device is characterized by comprising an excitation part, a flexible piezoelectric beam part, a detection part and a control part;
the excitation part comprises a servo motor, a speed reducer, a connecting rod, a sliding block, a first guide rail, a telescopic rod and a supporting seat;
the supporting seat is installed on the experiment table, the servo motor, the speed reducer and the first guide rail are installed on the supporting seat, the output end of the speed reducer is connected with one end of the connecting rod through a flange, the other end of the connecting rod is connected with the sliding block, the telescopic rod is hinged to the sliding block, the tail end of the telescopic rod is connected with the flexible piezoelectric beam part, the sliding block slides on the first guide rail, the servo motor drives the flange to rotate through speed reduction of the speed reducer, the sliding block is driven to move back and forth, and excitation is generated;
the flexible piezoelectric beam part comprises at least one flexible beam module, the flexible beam module comprises a second guide rail, a sliding base and a flexible beam, the sliding base slides on the second guide rail, one end of the flexible beam is fixed on the sliding base, the end is a fixed end, the other end is a free end, the free end is provided with a mass block, and the at least one flexible beam module is arranged in parallel;
the detection part detects the vibration signal of the flexible beam to obtain a control signal, and the control part is started to inhibit the vibration of the flexible beam.
2. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to claim 1, wherein the detection part comprises a high-speed camera, an acceleration sensor and a piezoelectric fiber sensor;
the high-speed camera is arranged above the flexible beam through the fixed rod, the flexible beam is in the visual field range of the high-speed camera, and the high-speed camera shoots pictures containing the flexible beam and inputs the pictures into the computer;
the acceleration sensor is arranged on the flexible beam, detects a vibration signal of the flexible beam, amplifies the vibration signal by the charge amplifier, and transmits the vibration signal to the motion control card through the terminal board, and the motion control card is connected with the computer;
the piezoelectric fiber sensor is arranged on the flexible beam, detects a vibration signal of the flexible beam, amplifies the vibration signal by the charge amplifier, and transmits the vibration signal to the motion control card through the terminal board, and the motion control card is connected with a computer.
3. The multi-flexible piezoelectric beam coupled vibration analysis control device according to claim 2, wherein the control portion comprises a servo motor driver, a piezoelectric fiber actuator and a piezoelectric fiber sheet controller,
the computer generates a corresponding control signal according to a required excitation signal, inputs the control signal into the motion control card, inputs the control signal into the servo motor driver through the terminal board and drives the servo motor;
the computer generates a corresponding control signal according to the acquired vibration signal, inputs the control signal into the motion control card, transmits the control signal to the piezoelectric fiber sheet controller through the terminal board, drives the piezoelectric fiber actuator and inhibits the vibration of the flexible beam.
4. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to claim 1, wherein when the number of the flexible beam modules is more than one, the adjacent flexible beam modules are connected through the spring.
5. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to claim 4, wherein the adjacent flexible beam modules are connected through springs, specifically, the mass blocks of the flexible beams are provided with spring piece fixing springs, the adjacent flexible beams are connected through springs, two flexible beams located at the head and the tail are connected, one is connected with the tail end of the telescopic rod, and the other is connected with the wall plate through a spring.
6. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to claim 1, wherein the number of the piezoelectric fiber sensors on each flexible beam is 2, the piezoelectric fiber sensors are adhered to the middle of the flexible beam 250mm away from the fixed end, the front and the back of the flexible beam are adhered, and the posture of the flexible beam is 0 °.
7. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to claim 1, wherein the number of the acceleration sensors on each flexible beam is 2, and the acceleration sensors are positioned in the middle of the free end by 70mm and are adhered to the front surface and the back surface of the flexible beam.
8. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to claim 1, wherein the number of the piezoelectric fiber actuators on each flexible beam is 2, and the piezoelectric fiber actuators are attached to the middle of 100mm from the fixed end, are attached to the front and back sides, and have an attitude of 0 °.
9. The multi-flexible piezoelectric beam coupled vibration analysis and control device according to any one of claims 1 to 8, further comprising a display.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920788764.XU CN209945667U (en) | 2019-05-29 | 2019-05-29 | Multi-flexible piezoelectric beam coupling vibration analysis control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920788764.XU CN209945667U (en) | 2019-05-29 | 2019-05-29 | Multi-flexible piezoelectric beam coupling vibration analysis control device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120569A (en) * | 2020-02-25 | 2020-05-08 | 江苏科技大学 | Vibration reduction mechanism for anchor machine support and operation method |
| CN112098024A (en) * | 2020-08-14 | 2020-12-18 | 华南理工大学 | Multi-flexible cantilever beam moving and rotating vibration analysis device and control method |
-
2019
- 2019-05-29 CN CN201920788764.XU patent/CN209945667U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111120569A (en) * | 2020-02-25 | 2020-05-08 | 江苏科技大学 | Vibration reduction mechanism for anchor machine support and operation method |
| CN112098024A (en) * | 2020-08-14 | 2020-12-18 | 华南理工大学 | Multi-flexible cantilever beam moving and rotating vibration analysis device and control method |
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