Sliding Mode Extremum Seeking Control of Motor Driving Nonlinear System

In this paper, an extremum seeking control with the sliding mode method for a motor driving system with deadzone nonlinearity is presented. The proposed scheme can cope with tracking control problem for the motor driving system with high relative degree. A novel cost function is designed to not only track the reference signal but also compensate for the nonlinearity. The simple form of the designed scheme makes it practical. Stability analysis proves that the present scheme can converge to a neighborhood relating to the cost function. The scheme in this paper can also ensure a satisfactory tracking performance with varying system parameters. Simulation results demonstrate the effectiveness of the proposed scheme.