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Reference signal self-extraction active vibration control method for piezoelectric intelligent structure

A technology of reference signal and intelligent structure, applied in electrical components, adaptive network, impedance network and other directions, can solve the problem of difficult to obtain accurate reference signal and so on

Inactive Publication Date: 2011-08-03
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problem that it is difficult to obtain accurate reference signals in the actual piezoelectric intelligent structural vibration active control system, and provides a useful technical method for the practical application of adaptive filter control methods

Method used

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  • Reference signal self-extraction active vibration control method for piezoelectric intelligent structure
  • Reference signal self-extraction active vibration control method for piezoelectric intelligent structure
  • Reference signal self-extraction active vibration control method for piezoelectric intelligent structure

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Experimental program
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Effect test

Embodiment 1

[0063] The reference signal self-extraction active control method of piezoelectric intelligent structure vibration, the specific operation steps are as follows:

[0064] (1) Carry out model identification on the control channel, and obtain the model identification parameters

[0065] ① Set the identification model filter order, step size factor, and identification error critical value, and select the excitation signal as the reference signal.

[0066] ②Set the excitation frequency and turn on the exciter to keep the piezoelectric smart structure in a state of continuous vibration;

[0067] ③ Use the minimum mean square error algorithm to adjust the model filter weights.

[0068] (2) Set the corresponding parameters and initial values ​​of the control algorithm

[0069] Including setting the control structure filter order and step factor, while referring to the signal The initial value of is selected as a random noise signal.

[0070] (3) Synthesize the reference signal ...

Embodiment 2

[0079] This embodiment takes the active vibration control of the piezoelectric intelligent structure of the simulated aircraft frame as an example, and the description is as follows:

[0080] see figure 1 and figure 2 As shown, this reference signal self-extracted piezoelectric intelligent structure vibration active control method is an adaptive filter vibration active control method for simulating aircraft frame piezoelectric intelligent structure. The specific control system settings and operation methods are as follows:

[0081] (1) The piezoelectric sensor network ① and the piezoelectric drive network ② are arranged in the form of distributed patches on the surface of the aircraft frame structure, forming a multi-channel structural vibration control system with 8 inputs and 8 outputs;

[0082] (2) A set of excitation devices that generate external disturbances to the frame structure of the simulated aircraft. The general principle is: use a signal generator to generate ...

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Abstract

The invention aims to provide a reference signal self-extraction active vibration control method for a piezoelectric intelligent structure, particularly an active vibration control method for a piezoelectric intelligent structure based on an adaptive filtering control least mean square algorithm, which directly utilizes a test platform for active vibration control on the piezoelectric intelligent structure to realize reference signal self-extraction active vibration control on adaptive filtering. The method directly extracts a vibration response residual signal from the piezoelectric intelligent vibration structure, constructs a reference signal based on the controller structure and the algorithm process data, meets the correlation with a disturbance signal and enters an algorithm control process. The method solves the problem that an accurate reference signal is difficult to obtain in a practical piezoelectric intelligent structure system, and provides a beneficial technical method for realizing practicability of the adaptive filtering control method on structural vibration.

Description

technical field [0001] The invention relates to a method for actively controlling the vibration of a piezoelectric intelligent structure by self-extracting reference signals, in particular to an active control method for the vibration of a piezoelectric intelligent structure based on an adaptive filter control least mean square algorithm. Background technique [0002] Intelligent structures represent a new direction in the development of materials and structures in the 21st century, especially in the field of active vibration control, which has very attractive prospects and has become a research hotspot in the field of vibration engineering. Active vibration damping intelligent structure is one of the important contents of intelligent material structure research. It uses sensors embedded in the structure to monitor the vibration state of the structure, and controls the driver embedded in the structure in real time according to a certain control law to change the vibration s...

Claims

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Application Information

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IPC IPC(8): H03H21/00
Inventor 朱晓锦黄全振高志远张合生高守玮易金聪曾祥强
Owner SHANGHAI UNIV
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