导引头伺服系统预定回路滑模控制律设计

Design of Sliding Mode Control Law for Seeker Servo System with Predetermined Loop

为了提高导引头伺服系统预定回路控制性能,针对系统中存在的饱和、死区等非线性环节,设计了一个基于指数趋近律的滑模控制器,并针对滑模面的可达性与整体系统的稳定性进行分析。通过调整滑模参数,可以实现系统对于非线性环节的抑制作用。通过仿真实验验证了导引头伺服系统预定回路滑模控制算法可行性,并通过与传统线性超前滞后控制器进行比较,验证了滑模控制器控制性能优于传统线性超前滞后控制器,从侧面证明了滑模控制算法对于非线性环节具有较好的抑制作用。

To improve the performance of the seeker servo system with predetermined loop,a sliding mode controller based on the exponential reaching law is designed for the nonlinear links such as saturation and dead time in the system.By adjusting the sliding mode parameters,the system can suppress the nonlinear links.The feasibility of the sliding mode control algorithm for the seeker servo system with predetermined loop is verified by simulation tests.The results show that the control performance of the sliding mode controller is better than that of the traditional linear lead-lag controller,indicating that the sliding mode control algorithm has a better inhibition effect on the nonlinear links.