Disturbances Rejection Research Of High Speed Linear Servo System

In modern industry, because of rapid development of the material, control technology,computer level linear servo system also has got very big improvement and progress. Due to thelinear servo has unique advantages, such as big thrust, low loss, high efficiency, it is becominga new development direction and has got more attention from new researchers,which isindependent of rotating machine. In this research field, scholars pay more and more attention toits control technology as well as the corresponding technology development and progress. So itsapplication has been extended to many fields. However, the linear motor also has its specialdefects and drawbacks, such as the end effect, tooth effect, the ripple effect of thrust fluctuation,the effects will, directly or indirectly influence linear servo system performance, to limit itsapplication. Especially in high precision CNC machine tools, due to relatively highrequirements and restrictions for precision, stable performance, anti-jamming performance,so toimprove corresponding application characteristics of linear servo system, and maintain highersystem performance, have become the current direction the scholars pay more attention to.In this context, the paper discussed the disturbance for permanent magnet linearsynchronous motor. Working principle and vector control principle of linear motor The paperwere firstly introduced and the general disturbance was analyzed; Secondly paper introducedthe basic principle of iterative learning control and the description of the algorithms; At last, thepaper introduced the new iterative learning algorithm and system simulation and experiment.The system adopts the two closed loop feedforward feedback system control strategy, thatwas current loop, velocity loop. Beening combined with the traditional PID control and using ofiterative learning control method, iterative learning compensation was operated in input andfeedback error end simultaneously, to constantly update signal, improve signal quality andimprove system resistance disturbance performance. The simulation and experimental resultsshowed that the control method can inhibition disturbance produced in permanent magnet linearsynchronous motor better, and realization method is relatively simple.