Modified Nonlinearity observer-based Sliding Mode Controller for Electric Vehicle Operation (Electric Vehicle Dynamics Study)

This manuscript presents a reduced component-based novel electric vehicle (EV) design model for reducing the cost and making the vehicle lighter. To improve stability and accuracy, the vehicle model is designed by considering different vehicle dynamics between the road, wheel resistance, acceleration constant, and different drive forces respectively. In this study, the proper modeling of the vehicle is achieved through different transfer function blocks such as the battery, converter, and electric motor model. In addition to the appropriate modeling, a modified nonlinearity observer-based sliding mode controller (MNOSMC) is proposed to compute the sudden disturbances that occurred during EV operations. Moreover, the instabilities as well as virtual estimation, an output feedback control combined with an extra feedforward compensation are suggested. In this study, two control loops speed and current loops are suggested for improving the EV performance by offering better tracking operation. To justify the contribution, MATLAB/Simulink model is developed and the outcomes are also compared with the traditional PI controller applications at different driving profile conditions.