A fiber grating-based GMA self-adaptive control method and device

Abstract

The invention provides a fiber grating-based GMA self-adaptive control method and device. A fiber grating sensor is adopted to acquire the mechanical coupling state information of multiple physical fields in a GMA actuation process in real time to obtain the feedback feature information of each component and extrinsic motivation of a GMA, and, based on the same, an online non-linear dynamic model of the GMA working process is established; the model self-adaptive follow-up control strategy between the motivation and the feedback is researched by analyzing the difference between anticipated feedback features and practical feedback features, so that the optimal self-adaptive control method meeting the application requirement is designed. According to the invention, the control to the GMA can be adjusted according to the change of working conditions of environments, and the GMA control accuracy can be guaranteed.

Description

Technical field [0001] The present invention relates to the technical field of fiber grating-based sensing, in particular to a method and device for GMA adaptive control based on fiber grating. Background technique [0002] In recent years, with the continuous improvement of performance requirements such as precision positioning and precision displacement of manufacturing equipment in the fields of aerospace, microelectronics, ultra-precision processing, modern bioengineering, and optical microprocessing, traditional materials can no longer meet the requirements. The giant magnetostrictive actuator GMA has the advantages of high power, high energy conversion efficiency, high drive precision, and fast response speed, and has attracted more and more attention. [0003] In developed countries in Europe and America, high-precision micro-actuation using giant magnetostrictive materials has been widely used. The nonlinear characteristics, principles and related theories of the micro-actu...

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Problems solved by technology

[0004] The current quantitative description of the GMM constitutive nonlinear relationship and the nonlinear characteristics of the micro-actuated structure coupled with the GMA multi-physics field mainly has the following deficiencies: (1) The existing theoretical modeling of the GMM constitutive relationship is either for the ideal state Under the multi-field coupling behavior, or for the hysteresis behavior of materials under quasi-static driving, constitutive models that can truly and effectively simulate the nonlinear characteristics of GMM multi-field coupling are relatively scarce

(2) For the GMA system with the GMM rod as the core driving element, there is no coupling theoretical framework that considers the principle of GMM rod composite action and the nonlinear time-varying modeling of the micro-actuation structure under the coupling condition of multi-physics factors at the same time.

(3) For the theoretical research on the coupling effects of magneto-elastic-thermal multi-physics factors, most of the existing research is carried out in the simulation environment with ideal assumptions, and lacks the characteristics of the GMA multi-physics factors under real working conditions, Research on Coupling Mechanism and Dynamic Nonlinear Characteristics

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