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Piezoelectric actuator hysteresis nonlinear modeling method and application

A piezoelectric actuator, hysteretic nonlinear technology, applied in special data processing applications, instruments, calculation models, etc., can solve the problems of lack of premature judgment mechanism, less improvement in algorithm efficiency and accuracy, and achieve improved convergence speed, Excellent effect, the effect of improving the convergence ability

Active Publication Date: 2019-08-09
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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Problems solved by technology

The above literatures have made certain contributions to improving the diversity of the population, but they do not yet have a complete premature judgment mechanism, and there are few improvements in improving the efficiency and accuracy of the algorithm

Method used

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  • Piezoelectric actuator hysteresis nonlinear modeling method and application
  • Piezoelectric actuator hysteresis nonlinear modeling method and application
  • Piezoelectric actuator hysteresis nonlinear modeling method and application

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0037] 1. Bouc-Wen model

[0038]In 1967, Bouc proposed the Bouc model for the first time, and then improved the model and applied it to a more general hysteretic system, and then Wen expanded the model in 1976. As a semi-physical differential equation model, the Bouc-Wen model was first used to describe hysteresis phenomena, and this model has been verified to be applicable to more general situations. Since then, more scholars have proposed a variety of extended Bouc-Wen models. Scholars such as Low proved that the Bouc-Wen model has good characteristics to characterize the hystere...

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Abstract

The invention relates to a piezoelectric actuator modeling method based on an improved chaotic quantum particle swarm and application. The modeling method adopts a Boc-Wen model to construct a hysteresis nonlinear model of a piezoelectric actuator, and parameters of the Bouc-Wen model are obtained through identification by an improved chaotic quantum particle swarm algorithm. The improved chaoticquantum particle swarm algorithm for parameter identification comprises the steps of initializing a solution space; carrying out iterative computation on the solution space by adopting a quantum particle swarm optimization algorithm, calculating an early-maturing coefficient after each iteration, judging whether the early-maturing coefficient is greater than a set value under continuous set times,if so, obtaining a new search range based on the current optimal solution, and carrying out chaotic search by using the new search range to obtain a new global optimal position; and after the iteration is finished, based on the final global optimal position, obtaining a Bouc-Wen model parameter. Compared with the prior art, the method has the advantages of capability of effectively simulating hysteresis nonlinearity, high parameter identification precision and the like.

Description

technical field [0001] The invention belongs to the technical field of control engineering and relates to a piezoelectric actuator, in particular to a piezoelectric actuator hysteresis nonlinear modeling method based on improved chaos quantum particle swarm optimization and its application. Background technique [0002] With the rapid development of microelectronics technology, communication technology and ultra-precision machining and other technologies, the precision servo field has higher and higher requirements for precision positioning technology. Piezoelectric actuators have the advantages of low power consumption, fast response, large driving force, and high displacement resolution. Therefore, they have been widely used in various fields of precision servo. However, due to the hysteresis nonlinear characteristics of piezoelectric actuators, the accuracy and stability of the operating system will be affected to varying degrees. Experts and scholars at home and abroad h...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06N3/00
CPCG06N3/006G06F30/20Y02P90/02
Inventor 邓亮刘萍
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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