Piezoelectric plate vibration detection and control device and method based on laser displacement sensor

Abstract

The invention discloses a piezoelectric plate vibration detection and control device and method based on a laser displacement sensor. The device comprises a flexible plate, a mechanical support clamping device, the laser displacement sensor, an ARM development plate, a piezoelectric amplifying circuit, a bending mode piezoelectric driver, a torsional mode piezoelectric driver, resistance strain gauge sensors, a dynamic resistance strain gauge, an A / D conversion circuit, a D / A conversion circuit, a computer and the like; the flexible plate is fixed through one end of the mechanical support clamping device, the multiple piezoelectric ceramic plate drivers and the resistance strain gauge sensors are sticked on the flexible plate, and the laser displacement sensor is installed right opposite to the flexible plate. Decoupling of bending and torsional vibration detection is achieved through the vibration detection advantage of the laser displacement sensor, the measurement value of resistance strain gauges can be dynamically calibrated, and by combination with an operating active control algorithm, controlling quantity is exerted on the piezoelectric ceramic plate drivers through the piezoelectric amplifying circuit, and the purpose of actively controlling the bending and torsional vibration of a piezoelectric plate is achieved.

Description

technical field [0001] The invention relates to the field of vibration detection and control of flexible plate structures, in particular to a piezoelectric plate vibration detection and control device and method based on a laser displacement sensor. Background technique [0002] With the rapid development of the aerospace industry, the energy required by the spacecraft is increasing, and the area of ​​the solar panels required is also larger. To reduce launch costs, solar panel structures are typically manufactured using lightweight materials to reduce structural weight. The modal damping of this kind of large flexible structure is small, and the high-order and low-frequency are dense. Especially in the space movement, under the condition of environmental disturbance, its large-scale vibration will last for a long time, which leads to the vibration problem caused by it becomes more and more serious. more and more prominent. If proper detection and control methods are not u...

AI Technical Summary

Problems solved by technology

However, in this patent application, the acceleration sensor is used to measure the bending and torsional vibration of the flexible board, which will add mass to the flexible board, which will change the structural characteristics of the flexible board and contain a lot of measurement noise.

At the same time, the piezoelectric ceramic sensor is used to measure the bending vibration signal, but it cannot measure the static signal and can only be used for dynamic signal measurement.

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