研究生部知识库

The adaptive optics system servo-loop blocks' transfer functions were presented. According to the whole servo-loop's characteristics, two kinds of system models are introduced: continuous system model and sampled data system model and the correspondent controllers are designed. PID controller and Smith predictive compensator are for the continuous system model. The correct bandwidth, steady-state error, etc of the two controllers were analyzed by comparing their Bode diagrams. The result shows that the Smith predictive compensator is better in improving the system's performance. Through analytic design method, obtaining a basic digital controller for the sampled data system model.