Position Control Of Linear Switched Reluctance Motor Based On Fast Nonsingular Terminal Sliding Mode

Linear switched reluctance motor is a linear electromechanical energy conversion device,which has the dual characteristics of linear motor and switched reluctance motor,on the one hand it has no use for the intermediate transmission device in linear motion,greatly improve the efficiency of the system,reduce the system error caused by the mechanical structure;on the other hand,linear switched reluctance motor as a direct drive motor,with fast response,high control precision,and has broad application prospects in the field of linear type high precision position control.With the rapid development of industry and the further application of related technology,people put forward the higher performance requirements of linear switched reluctance motor servo control system performance and robustness,the traditional control method cannot satisfy the control demand.This paper aims to seek a position closed loop control strategy,which is better than the traditional control methods,and strive to achieve a feasible algorithm,so as to broaden the scope of application of this kind of motor,suitable for modern industrial development needs,so it has important theoretical significance and practical significance.This paper first introduces the development history and research status of linear switched reluctance motor,elaborated its mechanical structure and working principle,and obtained the motor voltage equation,mechanical equation and electromechanical contact equation,the nonlinear model of switched reluctance motor is established according to the simulation using finite element.This paper introduces the basic principle of sliding mode variable structure,leads to rapid nonsingular terminal sliding mode control algorithm,using the special nonlinear control design of the control system of linear switched reluctance motor servo loop position controller,at the same time,for unknown load disturbance and the influence of static friction on the control precision of the problem,this paper constructs the reduction of the feedforward compensation of load observer,in order to improve the tracking accuracy of the system.Finally,this paper designs and makes a linear switched reluctance motor position control driver,which provides the hardware platform for the experimental verification of the control algorithm.In the Matlab/Simulink environment to build a linear switched reluctance motor position control system simulation model,the control effect of various algorithms are analyzed and compared,the simulation results show that the position control algorithm based on nonsingular terminal sliding mode has superior performance in the steady state,dynamic characteristics and robustness.At the same time the control algorithm is verified by simulation in the design of the hardware platform,the experimental results and simulation results are basically consistent,further validation of the algorithm in line switch feasibility and superiority of position control in switched reluctance motor.