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针对包含非线性和不确定性的飞机防滑刹车控制系统,本文提出了一种基于LuGre摩擦模型的滑模变结构控制器的设计方法。通过分析系统模型,离线构建了在不同速度和路面参数条件下系统的最优滑移率控制表,同时使用基于动态模型的观测器技术对轮胎/路面不确定的结合性能进行在线辨识。并利用指数趋近率的滑模变结构控制方法有效地抑制了系统的抖振。
In this paper, a design method of sliding mode variable structure controller based on LuGre friction model is proposed for the aircraft anti-skid brake control system including nonlinearity and uncertainty. By analyzing the system model, the optimal slip ratio control table of the system under different speed and pavement parameters is constructed offline. At the same time, the uncertain dynamic performance of the tire / pavement is identified online using the dynamic model-based observer technology. And the sliding mode variable structure control method based on exponential approach rate can effectively suppress the chattering of the system.