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Both-end clamped piezoelectric beam vibration detection and control device based on non-contact type sensor

A vibration detection and detection control technology, applied in measurement devices, vibration testing, electrical devices, etc., can solve problems such as large measurement noise, change the structural characteristics of flexible boards, etc., achieve high measurement accuracy, and realize vibration detection and control research. , Dynamic response and fast effect

Inactive Publication Date: 2015-04-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The acceleration sensor has additional mass on the flexible board, which will change the structural characteristics of the flexible board and contain a lot of measurement noise

Method used

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  • Both-end clamped piezoelectric beam vibration detection and control device based on non-contact type sensor
  • Both-end clamped piezoelectric beam vibration detection and control device based on non-contact type sensor
  • Both-end clamped piezoelectric beam vibration detection and control device based on non-contact type sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Such as Figure 1-Figure 6 As shown, a vibration detection and control device of a piezoelectric beam with fixed supports at both ends based on a non-contact sensor, including a flexible beam body, a vibration excitation part, a vibration detection part and a vibration control part;

[0035] The flexible beam body includes a flexible beam 7, and the two ends of the flexible beam 7 are fixed by a mechanical clamping device. The flexible beam is placed horizontally, and the mechanical clamping device is fixed on the base 10.

[0036] The vibration excitation part includes a signal generator, a first piezoelectric driving amplifying power supply and a piezoelectric excitation driver 6; at the left end of the flexible beam, 50 mm from the width edge of the flexible beam 7, and 22 mm from the length edge, the attitude angle is 0 °, double-sided Symmetrically paste 4 pieces of piezoelectric ceramic sheets, 2 pieces on each side, the polarity of the two sides is opposite and c...

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PUM

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Abstract

The invention discloses a both-end clamped piezoelectric beam vibration detection and control device based on a non-contact type sensor. The both-end clamped piezoelectric beam vibration detection and control device comprises a flexible beam body, a vibration excitation part, a vibration detection part and a vibration control part. According to the vibration excitation part, a modal vibration signal is generated through a signal generator and is amplified through a first piezoelectric drive amplifying power source, then a piezoelectric excitation driver excites the flexible beam body to vibrate. According to the vibration detection part, vibration of the flexible beam body is detected through a laser detection head and a piezoelectric ceramic piece sensor and transmitted to a computer through a laser displacement sensor controller and a charge amplifier. According to the vibration control part, a control signal of the computer is amplified through a second piezoelectric drive amplifying power source, the controlled quantity is applied on a piezoelectric ceramic piece driver, and the purpose of active control over vibration of a both-end clamped piezoelectric beam is achieved.

Description

technical field [0001] The invention relates to the field of vibration detection and control of a large flexible structure with both ends fixed, in particular to a vibration detection and control device for a piezoelectric beam with both ends fixedly supported based on a non-contact sensor. Background technique [0002] The flexible beam structure has the characteristics of light weight, small structural damping, and low modal frequency. It is widely used in spacecraft, space robots, civil engineering and industrial occasions. It is one of the main structural types in the engineering field, such as large-span The grid structure, satellite solar panel structure, aerospace wing, space station flexible manipulator, and new bridge are all examples of the application of flexible beam structures. In addition to bearing the working load, the flexible beam will also be affected by some external unpredictable factors (such as impact, overload, etc.), these effects will cause the flex...

Claims

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Application Information

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IPC IPC(8): G01B11/02G01H11/08G01M7/02
Inventor 邱志成谢凌波
Owner SOUTH CHINA UNIV OF TECH
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