| The electric servo system is the actuator of the missile control system. At present, the electricservo systems are mainly low-powered. In this paper, a certain type of high-power and quick-responseelectric servo system is studied, the key technologies are analyzed, varieties of advanced technologiesare used, and according to the actual condition, the controller and control algorithm are designed.Finally, the prototype of the electric servo system is designed. By simulation and experiment, thetechnical requirements which are put forward in the research task are reached. The main researchwork and achievements contain:A scheme is proposed using the gear and the ball screw mechanism, changing the rotationalmovement of motor to the linear motion of screw, and ensuring that the electric servo system haslarge bearing capacity and high transmission accuracy.The driving controller of the electric servo system is designed based on DSP control technology.In the main power circuit, the self-raise driving technology is used, the requirements of the auxiliarypower are reduced, and the brushless DC motor can run in four quadrants. The retardment of themotor uses energy regeneration, avoiding the current impact. The controller uses the three loopcontrol method of position, speed and current based on PID. And in the position-loop, the fuzz-PIDalgorithm is used to meet the demand of quick-response in various loads.The model of the brushless DC motor of the electric servo system is analyzed. The structure ofthe electric servo system is analyzed, the nonlinear links such as the friction in the system aredescribed and analyzed, the mathematical equation between the motor rotations to the rudder angle isdeduced, then the mathematical model of the electric servo system based on the brushless DC motor isgiven, and the parameters of the system are optimized.Finally, the prototype of the electric servo system is designed and the experiments prove that thedesign method is effective. |
