激光推进中继折转系统的控制分系统性能仿真

System simulation of laser relay system for laser propulsion

为了在激光推进系统中实现对主激光的精确控制,设计了中继折转系统。中继折转系统以光学方法捕获信标光后实时解算出信标光和主激光方向并驱动中继折转镜调整姿态,实现自主闭环跟踪。控制分系统采用基于PC104总线架构方式,由电流环、速度环和位置环构成三环调节系统。对整个控制系统进行了计算机仿真,设计位置回路的跟踪带宽为2 Hz,速度回路的带宽为5 Hz,系统的跟踪精度小于0.4°。仿真结果表明,中继折转系统达到了设计要求的控制精度,能满足整个激光推进系统的使用要求。

The laser relay system for precision control of main laser in laser propulsion system was presented. The relay system captures beacon laser and accomplishes close-loop tracking and a real-time work resolves the direction of main laser. The servo-system is designed with PC/104 platform. It is composed of current-loop, velocity-loop and position-loop. Through computer simulation shows the bandwidth of position-loop is 2 Hz and the bandwidth of velocity-loop is 5 Hz. Tracking precision is less than 0.4°. The simulation result indicates that the laser relay system reaches upper control precision, and meets the application demand of the laser propulsion system.