关键词: 粘滞, 二叉树模型, 模糊控制, 内模控制, Knocker

Abstract: An improved Binary-tree model is proposed to solve the stiction problem, and the fuzzy internal model Smith control method and the improved Knocker signal compensation method are used to compensate this problem. Firstly, improve its deficiencies when the dynamic friction is 0. And increase the judgment condition of the input signal rate, modify the model of improved two binomial tree model. The fuzzy internal model Smith control method can achieve the parameters of the system, reduce the shock, compensation stiction problem; adding threshold in Knocker signal at the same time, also can reduce the frequent movement of the valve from theory, increase the service life of the valve. The simulation results show that the improved model can effectively describe the viscous characteristics, and the two methods can effectively compensate the viscous problem and improve the performance of the system.

Key words: Stiction, Binary-tree model, fuzzy control, internal model control, knocker