Study On H_? Control Strategy Of Linear Magnetic Suspension Synchronous Motor Servo System

The research background of this paper comes from the following topics,which are supported by the National Natural Science Foundation of China(NSFC):"Research on the operation mechanism and control strategy of magnetic levitation feed platform for linear magnetic levitation synchronous motor"(project approval No.51575363).The main contents of this paper are as follows:(1)Establishment of mathematical model of linear magnetic levitation synchronous motor.Based on the analysis of the structure and working principle of linear magnetic levitation synchronous motor,the flux linkage equation and voltage equation under d-q axis coordinate are combined to obtain the corresponding mathematical model,which lays the foundation for the design of servo system controller of linear magnetic levitation synchronous motor.(2)Designing H_? robust controller for disturbance rejection.Based on the mathematical model of linear magnetic levitation synchronous motor servo system,the standard H_?control problem is analyzed.The basis of standard H_?problem is disturbance signal tracking and disturbance suppression.On this basis,the design of H_?robust controller for disturbance rejection is completed,and then the influence of disturbance rejection on external disturbance is realized.Design of Luenberger disturbance observer for linear magnetic levitation synchronous motor.As we all know,it is difficult to obtain directly and highly uncertain characteristics of linear magnetic levitation synchronous motor servo system disturbance.Therefore,this paper studies observing the uncertain disturbance of linear magnetic levitation synchronous motor servo system with Luenberger disturbance observer,and using the observational results as feedforward compensation of the controller,so as to reduce external disturbance to linear magnetic levitation synchronous motor servo system disturbance.The influence of motor servo system.The H_?robust control of linear magnetic levitation synchronous motor servo system is simulated by using Matlab/Simulink software,and the results are analyzed.(3)Optimal design of H_? controller based on particle swarm optimization.Particle swarm optimization(PSO)is applied to the selection of weighted coefficients and other parameters in the design of H?robust controller.The continuous function is optimized and global optimization is carried out.The performance index is designed and the range of parameters such as weighted coefficients to be optimized is standardized,so that PSO can quickly search for H?controller.Optimal solution of parameters.The H?robust control system of magnetic levitation linear synchronous motor based on particle swarm optimization(PSO)algorithm is simulated by using Matlab/Simulink,and the results are analyzed.