Active Control of Energy-Regenerative Electromagnetic Suspension Based on Energy Flow Analysis

The mathematical model for the developed electromagnetic actuator was established and a main/inner-loop control structure was proposed for its active control.The physical constraints of control current and the energy flow states of the inner-loop system were analyzed and a two-mode controller which respectively emphasizes on vibration control and energy regeneration was designed for the main-loop.Simulations were carried out with different road inputs and the results demonstrate that the former mode can improve vehicle ride comfort by more than 30% with battery energy consumption while in the latter mode the ride comfort can be improved by up to 10% with battery charged by regenerated energy.