空间光通信ATP系统粗跟踪平台的混合自适应控制

ATP系统的粗跟踪平台外框架对内框架的耦合作用以及内框架自身的不平衡所引起的加速度干扰是影响空间光通信系统光信号跟踪性能的重要因素。针对方位跟踪通道中的内框架系统结构,提出了应用一种混合自适应控制方法,该方法在设计自适应控制器时采用离散与连续相结合的方法,并将耦合作用和加速度干扰转换为对象的未建模动态进行处理。最终的仿真结果表明,被控对象在具有未建模动态和干扰的情况下,采用混合自适应控制算法能够获得较高的跟踪精度。

Hybrid self-adaptive control of coarse tracking platform in ATP system for space optical communication

In coarse tracking platform of ATP system, the key factors to influence the tracking performance are the coupling effect of the outer gimbal on the inner gimbal and the acceleration interference caused by the inner gimbal＇s imbalance. A hybrid self-adaptive control approach is proposed for the structure of inner gimbal in direction tracking. This approach designs a self-adaptive controller by combining the discrete control and continuous control. The coupling between gimbals and the acceleration interference are converted to tmmodeled dynamics of object. The digital simulation results show that hybrid self-adaptive control approach can attain good tracking precision and achieve satisfied control effect when the controlled object has unmodeled dynamics and interferences.