Instantaneous Angular Velocity Of The Satellite Scan Drive Mechanism Control Study

The satellite antenna scan drive institution is a core component of the whole satellite system, which has an effect upon the attitude of satellite and gathering data. On the base of particular introduction of several AC servocontrol technologies,the paper studies and ameliorates the drive institution of model muster project serious, The hardware and software of the system have been designed improved and debugged on the CPU of special motor controller-TMS320F240. The servo driven motor uses absolute situation optical encoder as situation feedback device in order to measure power angle and the system can progress control of power angle. High precision instant angle-velocity controlled of the drive institution can be realized by the three closed loop control mode including position feedback, power angle feedback and current feedback when system is stable, system progresses lose synchronization detection by inspecting power angle,and realizes the motor's re-synchronization after lose synchronization.In the control software, the modularization of program design is used for system analysis and study. In the control of driving, the system adopts control policy of space vector PWM theory and control arithmetic of PID mixed. The mixing programming is adopted in order to take advantage of the assembly language and C language. The experimentation and data analysis prove that the system is steady-going and reliable and the scheme is reasonable and feasible.