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Real-time Control Method for Hysteretic Nonlinear Compensation of Piezoelectric Actuators

A piezoelectric driver, hysteresis nonlinear technology, applied in the field of piezoelectric driver precision positioning control, can solve the problems of large processing data, complex control structure, difficult controller design, etc., to achieve the effect of reducing control error and simple control structure

Active Publication Date: 2022-05-27
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In order to improve the positioning accuracy, the above model must increase the data capacity and calculation amount of the controller, resulting in a complex control structure, a large amount of data processing and low efficiency, making the controller design difficult and expensive

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  • Real-time Control Method for Hysteretic Nonlinear Compensation of Piezoelectric Actuators
  • Real-time Control Method for Hysteretic Nonlinear Compensation of Piezoelectric Actuators
  • Real-time Control Method for Hysteretic Nonlinear Compensation of Piezoelectric Actuators

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Embodiment Construction

[0020] The invention proposes a real-time control method for hysteresis nonlinear compensation of piezoelectric driver, the input voltage signal is adjusted in the controller and then input into the piezoelectric driver to obtain the output displacement of the piezoelectric driver. The controller parameters in the controller are adjusted according to the displacement error effect, so as to obtain a better displacement compensation effect.

[0021] A real-time control method for piezoelectric driver hysteresis nonlinear compensation, the specific steps are:

[0022] Step 1. Compare the input signal voltage value at time t of the piezoelectric driver with the input signal voltage value at time t-T to determine the output signal of the controller;

[0023] Comparing the input signal voltage value at time t of the piezoelectric driver with the input signal voltage value at time t-T, the determined output signal of the controller is specifically:

[0024] When V in (t)-V in (t-T...

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Abstract

The present invention proposes a real-time control method for piezoelectric actuator hysteresis nonlinear compensation, the specific steps are: compare the input signal voltage value of the piezoelectric actuator at time t with the input signal voltage value at time t-T, and determine the control The output signal of the controller; the output voltage signal of the control controller is used as the input voltage signal of the piezoelectric driver to obtain the output displacement of the piezoelectric driver; the controller parameters are adjusted in real time according to the output displacement. The invention has a simple control structure, self-adaptively adjusts parameters according to the error data, and reduces the control error of the output displacement of the piezoelectric driver.

Description

technical field [0001] The invention belongs to the precise positioning control technology of piezoelectric drives, in particular to a real-time control method for hysteresis nonlinear compensation of piezoelectric drives. Background technique [0002] Piezoelectric ceramics has the advantages of small size, fast response and high precision, so it is an ideal precision positioning driving element, but due to the hysteresis and nonlinear characteristics of its material itself, it seriously restricts the positioning accuracy of the system, and the design of the controller brought difficulties. At present, the commonly used models for solving the hysteresis and nonlinear compensation of piezoelectric actuators include Presich model, Prandtl-Ishlinskii model and MaxWell model. The accuracy of the above models mainly depends on the number of parameters. In order to improve the positioning accuracy, the above model must increase the data capacity and calculation amount of the con...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/06
CPCH02N2/06
Inventor 陈远晟王舟王浩陈常顺赵荪翀杨国文黄勤斌
Owner NANJING UNIV OF SCI & TECH