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Method and system for suppressing hysteresis characteristics of piezoelectric actuator and medium

A technology of piezoelectric ceramics and actuators, which is applied in the field of suppression of hysteresis characteristics of piezoelectric ceramic actuators, can solve the problems of too many parameters for hysteresis model identification, general suppression effect of hysteresis characteristics, and insufficient fitting degree of hysteresis characteristics. Less process, high fitting degree, avoiding the effect of precise positioning

Active Publication Date: 2019-04-02
WUHAN INSTITUTE OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0006] 1. The hysteresis model is an ideal physical model but there are model errors, and the fitting degree to the hysteresis characteristics is not high enough;
[0007] 2. The hysteresis model needs to identify many parameters, the identification process is more complicated, and the effect is not good;
[0008] 3. Because the setting of fuzzy rules makes the calculation process more complicated, resulting in higher calculation difficulty, poor real-time performance, and the suppression effect of hysteresis characteristics is general

Method used

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  • Method and system for suppressing hysteresis characteristics of piezoelectric actuator and medium
  • Method and system for suppressing hysteresis characteristics of piezoelectric actuator and medium
  • Method and system for suppressing hysteresis characteristics of piezoelectric actuator and medium

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Embodiment 1

[0080] Embodiment one, as figure 1 As shown, a method for suppressing hysteresis characteristics of piezoelectric ceramic actuators includes the following steps:

[0081]S1: Obtain the output displacement generated by the piezoelectric ceramic actuator under the input voltage, and establish a hysteresis model according to the output displacement and the input voltage;

[0082] S2: Perform parameter identification on the hysteresis model to obtain a target hysteresis model;

[0083] S3: Design a fractional-order sliding mode controller according to the target hysteresis model, and use the fractional-order sliding mode controller to control the piezoelectric ceramic actuator.

[0084] Since the hysteresis characteristic of the piezoelectric ceramic actuator is directly reflected in the output displacement under the input voltage, the hysteresis model is established through the output displacement and the input voltage, and the hysteresis characteristic is described by the relat...

Embodiment 2

[0150] Embodiment two, such as Figure 10 As shown, a piezoelectric ceramic actuator hysteresis suppression system includes a power supply module, a sampling module, a processing module and a control module;

[0151] The power module is used to provide the input voltage of the piezoelectric ceramic actuator;

[0152] The sampling module is used to obtain the output displacement generated by the piezoelectric ceramic actuator under the input voltage;

[0153] The processing module is used to establish a hysteresis model according to the output displacement and the input voltage, and is also used to perform parameter identification on the hysteresis model to obtain a target hysteresis model, and is also used to design a fractional slippery slope according to the target hysteresis model. Modular controller;

[0154] The control module is used to control the piezoelectric ceramic actuator by using the fractional order sliding mode controller.

[0155] In this embodiment, the po...

Embodiment 3

[0158] Embodiment 3. Based on Embodiment 1 and Embodiment 2, this embodiment also discloses a suppression system for hysteresis characteristics of piezoelectric ceramic actuators, including a processor, a memory, and a A computer program on a processor, when said computer program runs, it realizes as figure 1 The following steps are shown:

[0159] S1: Obtain the output displacement generated by the piezoelectric ceramic actuator under the input voltage, and establish a hysteresis model according to the output displacement and the input voltage;

[0160] S2: Perform parameter identification on the hysteresis model to obtain a target hysteresis model;

[0161] S3: Design a fractional-order sliding mode controller according to the target hysteresis model, and use the fractional-order sliding mode controller to control the piezoelectric ceramic actuator.

[0162] By storing the computer program on the memory and running it on the processor, the suppression system of the hystere...

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Abstract

The invention relates to a method and a system for suppressing hysteresis characteristics of a piezoelectric actuator and a medium. The method comprises the following steps of: acquiring output displacement generated by the piezoelectric actuator under an input voltage, and establishing a hysteresis model according to the output displacement and the input voltage; identifying parameters for the hysteresis model to obtain a target hysteresis model; and designing a fractional sliding mode controller according to the target hysteresis model, and controlling the piezoelectric actuator by using thefractional sliding mode controller. According to the method and the system for suppressing the hysteresis characteristics of the piezoelectric actuator and the medium, the hysteresis characteristicsare described by the relationship between the output displacement and the input voltage, and the relationship between the hysteresis characteristics and the piezoelectric actuator can be better described. The piezoelectric actuator is controlled by the fractional sliding mode controller to better suppress jitter of a sliding surface, and the calculation process is less and the calculation difficulty is low, which can ensure the real-time control for the piezoelectric actuator to a large extent. The control effect is better, and the hysteresis characteristics of the piezoelectric actuator during operation can be more effectively suppressed.

Description

technical field [0001] The invention relates to the technical field of electromechanical control, in particular to a method, system and medium for suppressing hysteresis characteristics of piezoelectric ceramic actuators. Background technique [0002] Piezoelectric ceramic actuators have the advantages of small size, high energy density, high positioning accuracy, high resolution, and fast frequency response, and have been widely used in precision positioning, micro-electromechanical systems, micro-nano manufacturing technology, and nano-bioengineering. . [0003] For example, flexible electronics needs to realize large-area integration of nano-featured micro-nano-structured macroscopic devices on flexible substrates of any shape. Formation, which poses a great challenge to the driving, positioning and motion control performance of manufacturing equipment. Therefore, submicron precision positioning and motion control technology in the microscopic scale become necessary mea...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 李自成张赛王后能曾丽熊涛
Owner WUHAN INSTITUTE OF TECHNOLOGY
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