A Control-Oriented System Identification Method for Permanent Magnet Synchronous Linear Motor

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, including: S1, establishing a dynamic model of the motor; S2, considering the interference environment, and obtaining a comprehensive description of the model; S3 , identification of positioning force; S4, identification of frictional force; S5, use chaotic signal as the input signal of the driver, and collect the motor speed and position signal; S6, obtain effective excitation after offsetting the influence of nonlinear factors on the input signal, and identify the linear link transfer function; S7. Combining with the identification results, the tuning of the servo control parameters is completed. The invention analyzes the working principle of the system and the influence of the environment, completes the identification of typical nonlinear factors under the condition of full servo closed loop, realizes the linear identification of the remaining modules on the basis of separating typical nonlinear factors, and solves the problem of traditional linear identification The method identification accuracy is low, and the non-linear identification method is not clear about the control strategy and parameter design.

Description

technical field [0001] The invention belongs to the technical field of servo system model identification and motion control, and more particularly relates to a control-oriented permanent magnet synchronous linear motor system identification method. Background technique [0002] 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. Control-oriented system identification is the process of establishing a mathematical model of the system for the purpose of controller design. Establishing an appropriate controlled system model is of great practical significance for understanding the operating mechanism of the system and studying effective control strategies. [0003] Permanent magnet synchronous linear motor systems have complex electro...

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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