Position Tracking Optimization Control And Experimental Research Of Alternating Current Asynchronous Motor With Transient-state And Steady-state Constraints

Alternating current(AC)asynchronous motor has the characteristics of low operating cost,high reliability and small volume.It is widely used in our national economy.However,it has the characteristics of being strongly coupled,multi-variable and nonlinear,and is easily affected by other factors(such as temperature rise,parameter perturbation,etc.)in production practice;further,the basic theoretical research on AC induction motors currently focuses on satisfying the steady-state performance of the system,which does not fully consider the transient-state performance of the system;in addition,in the actual use of AC induction motors,people often use the empirical trial and error method to adjust the controller parameters,which method has a strong dependence on the subjective experience of the designer,and the whole process is complicated.In order to achieve high-performance position tracking control of AC asynchronous motors and meet the increasingly complex performance requirements and working environment,the main research work of this paper is as follows:(1)The mathematical model of AC induction motor in orthogonal coordinate system of directional synchronous rotation of rotor flux is established by coordinate transformation,which is based on the basic idea of rotor flux orientation vector control.(2)For the AC asynchronous motor position system,considering unmeasured flux,insufficient consideration of transient performance,optimization of controller parameters,and other problems,a prescribed performance optimization control method is proposed based on luenberger observer.By constructing a Luenberger observer to observe the rotor flux linkage of induction motor;the motor’s position controller is designed by combining the backstepping method with the prescribed performance function method,and the flux sliding mode controller of the motor is designed based on the variable gain exponential reaching law;GA＿IPSO hybrid intelligent optimization algorithm is used to optimize the parameters of the designed controller,which maximizes the control effect of the proposed control scheme.(3)For the AC asynchronous motor position system,considering the parameter disturbance,load disturbance,full state constraint,and other problems,a fixed time position tracking optimization control method with prescribed performance is proposed based on adaptive fixed time observers.By constructing an adaptive fixed time observer,the stator resistance with perturbation is estimated quickly and accurately;by constructing a fixed time disturbance observer to dynamically observe the matched/unmatched disturbance of the system;the motor’s position controller and flux linkage controller are designed by combining the fixed time control approach with the prescribed performance function method,which are under full state constraint;the GA＿SA hybrid intelligent optimization algorithm is used to optimize the parameters of the designed controller,which completes accurate tracking of the given values of the system.(4)For the AC asynchronous motor position system,considering the matched/unmatched disturbance,predefined-time convergence,and other problems,a predefined-time position tracking optimization control method with prescribed performance is proposed based on observers.By constructing the PTSMO to estimate the rotor flux linkage of motor;further,by constructing the PTDOs to dynamically observe the matched/unmatched disturbance of the system;the motor’s position controller and flux linkage controller are designed by combining the predefined-time control approach with the prescribed performance function method,which are under full state constraint;the AGA＿IPSO hybrid intelligent optimization algorithm is used to optimize the parameters of the designed controller;the effectiveness of the proposed method and the feasibility of its application in the actual motor system are verified by simulation and d SPACE experiment.