The Design & Implementation Of Actuator-based DSP

Air-to-air missile (AAM) is one of the key weapons to win a modern war. As an important part in AAM, the actuator is not only an actuating mechanism but also a major component in the guidance and control system.Today, actuators are developed towards all-electronics, digital and intelligent direction. Compared with traditional actuators, the digital actuator can easily implement the advanced control method. So it has become the trend of the actuator's development for its better performance, easier maintenance and higher reliability. The task of the paper is to design and complete a digital actuator prototype, and aim to improve the whole performance of the actuator with modern control methods.The electric actuator is a complex electro-mechanization system. Based on the analysis of the system, a mathematical model is established and simulated in this paper. According to the specifications of the actuator system, the phase-lead controller and PID controller are designed respectively. Through analyses of the system's low precision and low torque-load resistant capability with above traditional controls, the fuzzy self-regulating PID controller is recommended. By the simulations of the three control methods, it is proved that the latter not only has rapider response, but also has higher precision. Moreover, a prototype of the digital actuator system, based on the dedicated digital signal processor (DSP) chip TMS320F240, is produced. The program of the prototype is made, too. To test and compare the performance of the system on load and non-load conditions, experiments have been performed with three controllers. The results are in accordance with that of the simulations on the whole, which prove the advantage of the fuzzy controller.This project is of great practical significance and engineering value to the development of electric actuator. The DSP and fuzzy controller are firstly applied to the actuator system in AAM, which improve the whole performance of the actuator. Especially, the prototype has the features of flexible control, high reliability and quick response, it can be used to the development of electric actuator system if improved on engineering. The prototype provides another way for the development of the digital electric actuator.