Control-oriented permanent magnet synchronous linear motor system identification method

Abstract

The invention belongs to the technical field of servo system model identification and motion control, and discloses a control-oriented permanent magnet synchronous linear motor system identification method, which comprises the steps of: S1, establishing a motor dynamic model; S2, considering an interference environment to obtain model comprehensive description; S3, identifying a positioning force; S4, identifying a friction force; S5, taking a chaotic signal as a driver input signal, and collecting motor speed and position signals; S6, after the influence of nonlinear factors is counteracted by the input signal, acquiring effective excitation, and identifying a linear link transfer function; and S7, completing servo control parameter setting in combination with an identification result. By analyzing the system working principle and the environmental influence, typical nonlinear factors are identified under a servo full-closed-loop condition, and on the basis of separating the typical nonlinear factors, linearized identification of remaining modules is achieved; the problems that a traditional linear identification method is low in identification precision, and a nonlinear identification method is unclear in control strategy and parameter design are solved.

Description

technical field [0001] The invention belongs to the technical field of servo system model identification and motion control, and more specifically relates to a control-oriented permanent magnet synchronous linear motor system identification method. Background technique [0002] The permanent magnet synchronous linear motor is a transmission device that directly converts electrical energy into linear motion mechanical energy without any intermediate conversion mechanism. It has the advantages of simple structure, high positioning accuracy, fast response speed, and good follow-up performance. Control-oriented system identification is the process of establishing a mathematical model of the system for the purpose of controller design. Establishing a suitable model of the controlled system has strong practical significance for understanding the operating mechanism of the system and studying effective control strategies. [0003] The permanent magnet synchronous linear motor syste...

AI Technical Summary

Problems solved by technology

The present invention analyzes the working principle and environmental influence of the system, completes the identification of typical nonlinear factors under the condition of full servo closed loop, and realizes the linear identification of the remaining modules under the condition of only current loop closed loop and separation of typical nonlinear factors. Solve the problems of low identification accuracy of traditional linear identification method and unclear control strategy and parameter design of nonlinear identification method

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