基于电压空间矢量控制的卫星天线伺服系统

An Accurate and Steady Alternating Current Servo System of Satellite Antenna

系统采用电压空间矢量控制的永磁同步电机作为伺服驱动电机,永磁无刷直流电机作为动量平衡电机构成卫星天线伺服驱动系统。伺服电机采用电流、速度和位置三环控制,实现了伺服电机的超稳速和超高精度的运行。平衡电机采用电流、速度和加速度三环控制,保证了平衡电机能够快速、精确地跟踪。由于采用电压空间矢量作图法与瞬时零矢量插入法相结合的控制策略,避免了空间矢量控制中的计算过程,实现了速度调节和转矩调节(电流调节)的解耦控制。

The driver is the core part of the satellite antenna. An Alternating Current servo system for making rotary antenna at an accurately constant speed. Based on the design ideas of the polygon flux linkage locus, construct is used to get the switch table of three-phase inverter. The hardware and software of the system have been designed and debugged on the CPU of special motor controller-TMS320F240. Simulation result shows that the error of angle measure is within ±0.07° and precision of scan cycle can be within ±0.34ms in this system.