Vehicle Dynamics Modeling and Control of Electrodynamic system-based suspension.

摘要

The electrodynamic system (ED system) is a type of an actuator to improve the dynamic performance of a vehicle and simultaneously regenerate the usable energy from the vibration source. Through this thesis, the rack and pinion type ED actuator with active and energy scavenging modes is proposed, and it is implemented on the vehicle model. The prototype ED actuator is tested in the shock dyno. The resistor value of the prototype is adjusted to verify that the variable damping coefficient is achievable through adjusting the external resistor. The developed ED actuator is implemented on the Quarter car, 7 DOF vehicle ride model and 14 DOF full vehicle model, and it is simulated in various road conditions and steering maneuvers. The Carsim software is used to validate the developed 14 DOF model.;LQR controller is used and implemented in the ED system-based vehicle model. To realize active and energy scavenging modes of the system, PI current controller, and variable resistor control is applied to the ED actuator. From the simulation results, the developed ED system-based suspension has been proved to be effective. Also, simulation results have proven that the active control for the ED system-based can enhance the ride comfort of a vehicle. It is verified that the vibration energy caused by road roughness can be regenerated by proposed energy scavenging suspension, and meanwhile acceptable ride comfort can be ensured.