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Hysteresis segmentation modeling and compensation method based on piezoelectric ceramic driver

A technology of piezoelectric ceramics and compensation method, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc. and other problems, to achieve the effect of improving computing efficiency, simple model, and small amount of calculation.

Active Publication Date: 2021-07-02
HEFEI UNIV OF TECH
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The hysteresis model of piezoelectric ceramics that has been developed has a complex structure, parameters are difficult to determine, and the identification process is very difficult
This makes it not widely used in real-time control systems

Method used

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  • Hysteresis segmentation modeling and compensation method based on piezoelectric ceramic driver
  • Hysteresis segmentation modeling and compensation method based on piezoelectric ceramic driver
  • Hysteresis segmentation modeling and compensation method based on piezoelectric ceramic driver

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Embodiment Construction

[0046] In this embodiment, a hysteresis segmentation modeling and compensation method based on the piezoelectric ceramic driver is to use a voltage amplifier to amplify the analog voltage output by the digital-to-analog converter to drive the piezoelectric ceramic driver to move; load the piezoelectric ceramic driver to the limit voltage , to obtain the hysteresis main loop curve; according to the hysteresis main loop that has been completed, other input voltages are applied to the piezoelectric ceramic driver (the voltage of which is included in the main loop voltage range), and the formed hysteresis secondary loops can be obtained from the hysteresis main loop; Using the hysteresis main loop in the high-order rational fractional approximation model, the hysteresis segmentation modeling is completed through the recursive algorithm, and the hysteresis of the piezoelectric ceramic driver is compensated by the feedforward control method according to the voltage and displacement hy...

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Abstract

The invention discloses a hysteresis segmentation modeling and compensation method for a piezoelectric ceramic driver, and the method comprises the steps: S1, amplifying an analog voltage outputted by a digital-to-analog converter through a voltage amplifier, and driving the piezoelectric ceramic driver to move; S2, loading the piezoelectric ceramic driver to a limit voltage to obtain a hysteresis main loop curve of the piezoelectric ceramic driver; S3, loading other input voltages (the voltages are included in the voltage range of the main ring) to the piezoelectric ceramic driver by using the main hysteresis ring completed in the step S2, and obtaining formed secondary hysteresis rings by the main hysteresis ring; S4, utilizing a hysteresis main ring in the high-order rational fraction approximation model, and completing hysteresis segmentation modeling and compensation through a recursive algorithm. According to the method, a mathematical model of hysteresis nonlinearity can be accurately described, and a piezoelectric ceramic driver hysteresis model which is simple and high in precision is developed, so that a model foundation is laid for researching accurate control of a piezoelectric ceramic driver in an ultra-precise displacement driving system.

Description

technical field [0001] The invention relates to the nonlinear control field of an ultra-precision piezoelectric drive system, and more specifically relates to a hysteresis segmentation modeling and compensation method based on a piezoelectric ceramic drive. Background technique [0002] Piezoelectric ceramic actuators have the advantages of solid-state actuation, high precision and fast response, and have been widely used in many fields, such as scanning tunneling microscopes, micro-nano three-dimensional coordinate measuring machines and other precision instruments and equipment. Actuators are generally required to have nanoscale resolution in displacement, high stiffness, and fast frequency response. However, piezoelectric ceramic actuators suffer from the inherent hysteresis behavior of nonlinear dielectric materials, which have severe hysteresis between input voltage and output displacement, which greatly limits their positioning control accuracy. In order to improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/06G06F30/20
CPCH02N2/062G06F30/20
Inventor 黄强先张帆卞轲玮张何洋张连生程荣俊
Owner HEFEI UNIV OF TECH
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