Feedforward closed loop composite control method and system of piezoelectric ceramic driver

A piezoelectric ceramic and composite control technology, which is applied in general control systems, control/regulation systems, adaptive control, etc., can solve problems such as asymmetrical hysteresis curves of piezoelectric ceramics
CN107608209AInactive Publication Date: 2018-01-19SUZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU UNIV
Publication Date
2018-01-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a feedforward closed loop composite control method and system of a piezoelectric ceramic driver, which are designed to improve control precision. The arbitrary non-linear expression capability of a neural network is utilized, a PID controller for self-learning of parameters kp, ki and kd is established through learning of the performance of a piezoelectric ceramic closed loop control system, and the setting PID controller is utilized to control a piezoelectric ceramic driver through a feedback displacement closed loop control method. Parameters of the PID controller are adjusted on the basis of operating states of the system to achieve optimization of a certain performance index, so output states of output layer Neurons correspond to the three adjustable parameterskp, ki and kd of the PID controller, and through self-learning of the neural network and weighting coefficient adjustments, the output of the neural network corresponds to the parameters of the PID controller under a certain optimal control rule.
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Description

technical field

[0001] The invention relates to a feedforward and closed-loop compound control method and system of a piezoelectric ceramic driver. Background technique

[0002] There are errors in the feedforward compensation of the hysteresis model of piezoelectric ceramics, and the anti-interference performance of the open-loop control is poor, and the closed-loop control has a feedback link that can effectively anti-interference. The PID controller obtains the control deviation e(t) according to the given value r(t) and the actual output value f(t), that is, e(t)=r(t)-f(t), and then the ratio of the deviation value , integral and differential form the control variable through linear combination, and control the controlled object. PID controller is a kind of linear controller, and its control law is:

[0003]

[0004] where k p - Scale factor; T I - integration time constant; T D - differential time constant; e(t) - deviation signal.

[0005] In simple terms, the ...

Claims

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