Study on estimation of the instantaneous disturbance values of EMS

This paper presents a novel methodology of estimating the instantaneous values of disturbance force of electromagnetic suspension system, which is controlled by twin electromagnets to manage upward and downward disturbance forces. We have employed neural network system with backpropagation to learn the relationship between the system variables and the disturbance force as the output. The simulation results show satisfactory estimation with the function of generating the instantaneous values, which agree well with the applied disturbance. The paper also demonstrates a nonlinear control system working stably for a wide range of gaps of the electromagnets.