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针对常规指数趋近律单向辅助面滑模控制中存在的抖振问题,提出了一种基于变指数趋近律的单向辅助面滑模控制方法。针对系统控制量变化时飞机模型发生跳变的问题,进行T-S模糊建模,以保证非线性系统在控制区间上的平滑性;在对UAS-SMC(Unidirectional Auxiliary Surfaces-Sliding Mode Control)方法进行分析的基础上,给出了一种变指数的趋近律;结合飞机模型和变指数趋近律,设计了基于变指数单向辅助面滑模控制器。仿真实验结果表明,该控制策略能保证趋近过程快速性的同时在接近滑模面时能有效减少系统的抖振。
Aiming at the chattering problem existing in one-way auxiliary surface sliding mode control with generalized exponential reaching law, a one-way auxiliary surface sliding mode control method based on the exponential reaching law is proposed. In order to ensure the smoothness of the nonlinear system in the control zone, aiming at the problem that the aircraft model jumps when the system control variable changes, the TS fuzzy modeling is carried out. After analyzing the UAS-SMC (Unidirectional Auxiliary Surfaces-Sliding Mode Control) method, Based on this, a approach of the approaching law of variable exponential is given. Based on the airplane model and the exponential reaching law, a variable direction exponential one-way auxiliary surface sliding mode controller is designed. The simulation results show that this control strategy can ensure the fastness of the approach process and reduce the chattering of the system when it approaches the sliding mode surface.