電動式パワーステアリングのモデリングと制御

抄録

This paper outlines the development of a simulation method which predicts the handle torque of an electrically assisted power steering system. The electrically assisted power steering system would provide benefits for fuel economy and flexibility in controlling the handle torque. A DC motor with torque sensory feedback is used in this system. However, the DC motor tends to cause torque fluctuation and the feel of rough handling. In order to reduce torque fluctuation, an equation of motion with a 5-degree of freedom model has been formulated for analysis on the electrically assisted power steering, and the methods of controlling the handle torque have been investigated. Feasibility experiments and simulation results show that the simulation method is effective for developing an electrically assisted power steering system.