Digital Limited Angle Brushless Dc Torque Motor Servo Control System

A new-style missile actuator servo control system is studied in the dissertation. The system is a Digital Limited Angle Brushless DC torque motor control system with a control core of 80C196KC MCU (micro chip computer). It has the characteristic of non-gear-box, large output torque, small volume, easy control, fast response, high track precision, high reliability etc. The system has potential advantages over substituting for traditional hydraulic or pneumatic missile actuator servo control system and has wide prospect in the fields of aerial actuator, servo valve, robot, radar antenna etc.The system's operation principle, control idea, functions and realization of each component are discussed in detail. The methods of determination bipolar inputting control signal, optic-electron coder feedback signal connecting with MCU, dimension's unity of inputting signal between feedback signal, zero position orientation, and logical drive are proposed and realized.The author schemes out the system's principle circuit, and completes the design, debug of hardware and software, test of the prototype performances. In the designation of software, the author adopts the modular designing method, and makes full use of the functions what the MCU offers, such as A/D function, interrupt function, PWM function, and software timer function. As a result, the following subroutines are programmed: A/D sample, read optic-electron coder signal, disposition of orientation interruption, Z interruption, and software timer. These designs not only simplified the program structure, but also improved real-time performance, security, and precision of the system. Moreover, the time of debug the system's software is saved. The design aim is achieved through the testing of the prototype performance.The system is analyzed deeply in theory through discussion and simulation of the several controller design methods, including the continuous-discrete field designation, the mathematic resolution, and the fuzzy control design methods.Eventually, the problems, solutions and the personnel experience in designing and debugging are summarized. The application prospect of the system is presented.