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Piezoelectric ceramic actuator hysteretic model and control method thereof

A technology of piezoelectric ceramics and control methods, applied in the directions of adaptive control, general control system, control/regulation system, etc., can solve problems such as difficult to control hysteresis system

Inactive Publication Date: 2015-06-03
ZHEJIANG SCI-TECH UNIV
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing traditional control scheme is difficult to control the hysteresis system, and proposes a control method based on error transformation to eliminate the influence of hysteresis and improve control accuracy

Method used

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  • Piezoelectric ceramic actuator hysteretic model and control method thereof
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  • Piezoelectric ceramic actuator hysteretic model and control method thereof

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Embodiment 1

[0031] Embodiment 1, Figure 1 ~ Figure 4 A hysteresis model of piezoelectric ceramic actuator and its control method are given.

[0032] The piezoelectric ceramic actuator hysteresis model includes a transformation module 1 , an adaptive control module 2 , a piezoelectric ceramic actuator hysteresis model 3 , a dynamic system module 4 and a subtractor 5 . Among them, the error transformation module 1, the adaptive control module 2, the piezoelectric ceramic actuator hysteresis model 3 and the dynamic system module 4 are connected in series in sequence. Error transformation module 1 outputs z 1 (t) to the adaptive control module 2; the adaptive control module 2 outputs v(t) to the piezoelectric ceramic actuator hysteresis model 3; the piezoelectric ceramic actuator hysteresis model 3 outputs u(t) to the dynamic system module 4; The actual output y(t) of system module 4 and the expected output y d (t) obtain difference e(t) by subtractor 5; obtain z after error transformatio...

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Abstract

The invention discloses a piezoelectric ceramic actuator hysteretic model. The piezoelectric ceramic actuator hysteretic model comprises an error conversion module (1), a self-adaptive control module (2), a piezoelectric ceramic actuator hysteretic module (3) and a dynamic system module (4), wherein the error conversion module (1) is used for outputting z1(t) to the self-adaptive control module (2); the self-adaptive control module (2) is used for outputting v(t) to the piezoelectric ceramic actuator hysteretic module (3); the piezoelectric ceramic actuator hysteretic module (3) is used for outputting u(t) to the dynamic system module (4); the dynamic system module (4) is used for outputting y(t); a difference value e(t) is obtained by carrying out subtraction on the y(t) which is actually output by the dynamic system module (4) and yd(t) which is expected to be output through a subtracter (5); z(t) can be obtained by carrying out conversion on the difference value e(t) through the error conversion module (1).

Description

technical field [0001] The invention relates to modeling of hysteresis characteristics of piezoelectric ceramic actuators and a control method based on error transformation, belonging to the technical field of nonlinear hysteresis system modeling and control. Background technique [0002] With the development of micro-nano technology, smart materials are widely used in precision machining and positioning systems. Due to the advantages of small size, high energy density, high positioning accuracy, high resolution, and fast frequency response, piezoelectric ceramic actuators have been widely used. However, the piezoelectric ceramic actuator system has the characteristics of non-smoothness, multi-mapping, memory, and rate dependence, and it cannot be precisely controlled by conventional methods. Therefore, it is extremely necessary to design a suitable control method. [0003] In order to eliminate the adverse effects of hysteresis characteristics, the conventional control sch...

Claims

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Application Information

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IPC IPC(8): G05B13/04
Inventor 赵新龙汪佳丽
Owner ZHEJIANG SCI-TECH UNIV
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