低源流量Delta掺杂p型GaN外延薄膜的研究

卫星平台的振动是降低光通信链路可靠性的一个重要因素。提出在精跟踪系统中采用自适应逆控制方案来抑制卫星平台振动的影响, 从而实现对目标光通信终端的稳定跟踪。采用对象的自适应逆作为控制器来控制快速反射镜偏转, 以保证系统的动态响应品质; 采用自适应逆控制中的自适应扰动消除系统来抑制卫星平台的振动。实现了对象控制和扰动消除分开进行且不相互影响。仿真结果表明该控制律有效地实现了对输入的跟踪, 且能较好地抑制扰动。

Investigation on Low Source Flux Delta Doped p-GaN Flim Grown by MOCVD

In the satellite optical communication system, the vibration of satellite platform will seriously affect the natural performance of laser communication. Therefore the adaptive inverse control scheme is used in fine tracking system to suppress the platform vibration and then the counter optical communication terminal can be tracked steadily. In adaptive inverse control system, tracking control and jitter rejection can be respectively realized without influencing each other. In order to confirm the dynamic characteristic of the system, the inverse of the plant is used as the controller of fast steering mirror. And the adaptive disturbance canceling system of adaptive inverse control system is used to suppress the platform vibration. The simulation results show that the system can track the input effectively with adaptive inverse control algorithm,and the platform vibration is suppressed effectively.