Indirect Adaptive Fuzzy Sliding-Mode Control for Hydraulic Manipulators
In order to overcome the nonlinear characteristics,parameter uncertainties and load disturbance of the hydraulic manipulator system,Firstly the driving principle and dynamics of the hydraulic manipulator are analyzed,and the nonlinear mathematical model of the servo hydraulic system in the manipulator is established,then a control strategy of indirect adaptive fuzzy sliding mode(IAFSMC)is proposed.The adaptive algorithm and the principle of fuzzy approximation is used to estimate the unknown parameters of the system,which effectively overcomes the influence of system uncertainties.By using the adaptive fuzzy control method,the switching term in the sliding mode controller achieves fuzzy approximation,which makes the switching term continuous and can effectively reduce chattering and suppress interference.Then the control law and adaptive law of the system are presented,and the stability of the algorithm is analyzed by Lyapunov method.The MATLAB is used to simulate the hydraulic servo system of the manipulator.The simulation results show that the indirect adaptive fuzzy sliding mode variable structure control method can accurately track the joint path of the hydraulic mechanical manipulator and has strong robustness to parameter changes.Compared with the traditional PID control technology,this control algorithm produces less tracking error and better control performance.
Hydraulic mechanical manipulator Adaptive fuzzy sliding mode Parameter change
Xin Huang Yi Wan Yao Sun Jiarui Hou
Key Laboratory of High-Efficiency and Clean Mechanical Manufacture,College of Mechanical Engineering National Demonstration Center for Experimental Mechanical Engineering Education,Shandong University,
国际会议
浙江湖州
英文
229-242
2019-08-12（万方平台首次上网日期，不代表论文的发表时间）