Research on Train Speed Tracking Based on Improved Fuzzy Sliding Mode Control
The train operation process is characterized by strong coupling,nonlinearity,and frequent large and unob-servable external disturbances,which cause difficulty in train operation control.A new fuzzy sliding mode controller de-sign method was proposed for the train operation speed tracking control problem.Firstly,based on fuzzy sliding mode control,a global fast terminal sliding mode control was introduced to make the system reach a steady state in a finite time.Then an adaptive disturbance estimation term compensated by the absolute value of the derivative of the Lyapunov function was constructed to make an accurate estimation of external disturbances.A double-layer hierarchical and expo-nential reaching law global fast terminal fuzzy sliding mode controller was proposed.By introducing the exponential reac-hing law to regulate the dynamic quality of the sliding mode surface,the controller can quickly converge to a stable state and effectively eliminate the jitter of the controller.Finally,the effectiveness of the proposed method was verified by sim-ulation cases,which improves the train control system performance.
万方数据
维普
