Modelling and Control Design for Electric Power Steering system with Cascaded Lead Compensation Method

摘要

This paper presents a new control strategy for an Electric Power Steering system. Due to higher steering assist gain and non linear torque map, which reduces stability and causes vibrations in steering system, an stabilizing compensator should be included in the controller system. The role of compensator is to provide stability to the system and also to accelerate the system response time. A faster response is required as a slight delay or overshoot in steering control can lead to severe consequences. The stability of the system with torque map is detailed. Cascaded lead compensators are designed and applied to the system and the theoretical analysis is verified from the simulation and experimental results.