The conventional EPS systems have a lot of problems for solution about progress of steering feeling, stability and reliability etc. by various driving conditions. This paper reports on the development of a steering simulator effective to clarify the cause of those problems, and to give remedial measures in addition. First, the EPS system was modeled considering vehicle motion. Next, the simulation package for the steer characteristic analysis was made. Lastly, The steering simulator was developed based on it. And, the effectiveness was verified by vehicle experiment.
