全局滑模控制仿真实验设计

Simulation experiment design of global sliding mode control

对于二阶非线性系统,在建模不确定和外部干扰信号情况下,提出一种全局滑模控制器进行控制。在全局滑模控制器的设计中,采用非线性滑模面和指数趋近律,通过采用饱和函数代替符号函数来削弱抖振。以二阶Duffing-Holmes混沌系统的控制为例,通过MATLAB/Simulink软件建立全局滑模控制仿真实验。仿真结果表明,全局滑模控制器具有速度快和鲁棒性好等优点。该仿真实验非常的形象和直观,有助于学生对全局滑模控制的理论理解和实际应用。

For the two order nonlinear system,a global sliding mode controller(GSMC)is proposed in the presence of model uncertainties and external disturbances.In the design of the GSMC,the nonlinear sliding surface and exponential reaching law are adopted,and the chattering effect is weakened by replacing the sign function with saturation function.Taking the control of two order Duffing-Holmes chaotic system as an example,the global sliding mode control simulation experiment is built by using MATLAB/Simulink software.The simulation results show that the global sliding mode controller has the advantages of fast speed and good robustness.The simulation experiment is very vivid and intuitive,which helps students to understand and apply the global sliding mode control theory.