Modeling and simulation of a vehicular flywheel battery and vibration suppression

Based on the concept of engine mounting, the stator of the flywheel battery is suspended. The electromagnetic bearing's mechanical model and the magnetic disturbance forces of the magnetic suspension rotor are derived using PD control. A 15-degree-of-freedom (15-DOF) mechanical model for the vehicular flywheel battery is established via both the integrated and isolated methods. The system’s differential equations are derived using the energy method and Lagrange’s equations. Vehicle models for climbing, acceleration, and continuous speed bumps are developed. The system is solved numerically in MATLAB using the fourth-order Runge-Kutta method.The study investigates two driving conditions (constant speed and acceleration) under two road scenarios (continuous speed bumps and slope climbing). The effects of vehicle speed, speed bump height, and slope gradient on the motion patterns and response amplitudes of the levitated rotor are analyzed. Time-domain signals are processed via Fast Fourier Transform (FFT) to examine the rotor’s power spectral density characteristics.