采用自调整模糊变结构控制的机载激光通信视轴稳定研究

Self-adjusting fuzzy variable structure control of optical axis stabilization for airborne laser communication

机载激光通信的动态视轴稳定是建立激光通信链路的首要前提,传统的粗跟踪控制方法不能克服载体扰动及参数变化对系统的不利影响,影响了视轴稳定精度。根据控制系统的任务,将论域自调整模糊控制与滑模变结构控制的思想相融合,在稳定的误差相平面内构造稳定的滑模面。理论分析和模拟实验结果表明,该方法消除了系统的抖振现象,改善了系统的瞬态性能,对机载通信平台受到的扰动及参数变化具有完全的自适应性。因此自调整模糊变结构控制具有一定鲁棒性,且控制算法简单,可望获得工程应用。

For the airborne laser communication, optical axis stabilization is the key to keep laser communication link. Conventional coarse tracking controlling method can not effectively overcome the effect of system model parameter change and their influence of uncertainty. According to control requirement, the variable structure controller （VSC） and self-adjusting fuzzy control method was fused, which can force system state to reach sliding surface. Theoretical research and simulation results show it can fully adapt to the disturbance and parameter changes of airborne communication platform. So it has great robustness, and is expected to apply in engineering.