Efficient Vibration Control: Model Predictive Controller Design for In-Wheel Motor-Driven Electric Vehicle Suspension Systems
摘要
This paper presents a Model Predictive Controller (MPC) to optimize the In-Wheel Motor -Active Suspension System (IWM-ASS) in electric vehicles, reducing vibration and enhancing ride comfort. The quarter-vehicle active suspension model incorporates dynamic damping within the in-wheel motor-driven system, utilizing the in-wheel motor as a Dynamic Vibration Absorber (DVA) to effectively mitigate forces transmitted to the motor bearing.
MethodA conventional Proportional Integral and Derivative (PID) controller is implemented initially and fine-tuned using a Genetic Algorithm (GA). MPC is introduced, which employs predictive modeling that dynamically adjusts suspension parameters in real-time under varying road conditions.
ResultsSimulation results show that the MPC reduces RMS and frequency-weighted RMS of body acceleration by 24.82% and 58.75%, respectively, compared to passive suspension. Experimental results on an IWM-EV test bed indicate a 74% improvement in ride quality over the passive system and a 53% improvement over the conventional PID controller. The PID comparison is included as it represents a widely used benchmark in ASS.
ConclusionThis highlights the efficacy of MPC both on a simulation and experimental platforms, as an active suspension control strategy for electric vehicles equipped with IWM-ASS.