Design And Research Of A High Precision Servo System

In order to satisfy the requirement of modern war, more stringent performance requirement has being made for rocket launching system, the precision and robustness must be increased. with the design task of a certain type of sample circumvolve-tower, in this paper, a high-precision AC Position Servo System is researched on, and the overall scheme, control strategy, hardware circuits, software program are designed. Results demonstrate that the proposed method performs well, and it has some referenced value.Differential operation is extremely sensitive to noise, which is easily to be amplified,thus exciting system’s up-built features, and seriously affecting the accuracy of the controller, so the reference signal is not suitable to be directly operate the differential.A high-gain observer is designed to estimate the higher order derivatives of the signal. Aiming at wide variations in moment of inertia, large disturbed moment of a rocket launcher position servo system, a fuzzy controller based on adaptive sliding mode control (AFSMC) was presented.. The simulation results show that the proposed approach can eliminate chattering problem effectively, guarantee the response speed and control accuracy, and possess a strong robustness to both parameter perturbation and load disturbance.The design of software and hardware based on the core processor DSP is completed. The position controller use serial interface to receive target’s reference signal,and get current location information from the resolver’s feedback, after operation, the control order will be export to the servo drive through the DA and amplification circuit, achieving the accurate tracking effect of target signal.The analysis of experimental results verified the reliability of system’s hardware and software design, and also the correctness of theoretical analyzing and simulation research were proved, which provided reference for the farther research and application.