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A simulation system has been developed to facilitate the analysis of vehicle dynamics control systems (e.g., ABS, 4WS, active suspension, etc.). This system can analyze the controllability of a vehicle model when combined with a controller. Its main features are: 1. The ability to simulate the various motions of a vehicle, utilizing a vehicle model that has been adjusted for the purpose. 2. All operations, from data preparation to final analysis, can be done easily and efficiently.

The driving simulator (DS) developed by Toyota Motor Corporation simulates acceleration using translational (XY direction) and tilting motions. However, the driver of the DS may perceive a feeling of rotation generated by the tilting motion, which is not generated in an actual vehicle. If the driver perceives rotation, a vestibulo-ocular reflex (VOR) is generated that results in an unnecessary correction in the driver's gaze. This generates a conflict between the vestibular and visual sensations of the driver and causes motion sickness. Although such motion sickness can be alleviated by reducing the tilting motion of the DS, this has the effect of increasing the amount of XY motion, which has a limited range. Therefore, it is desirable to limit the reduction in the tilting motion of the DS to the specific timing and amount required to alleviate motion sickness. However, the timing and extent of the VOR has yet to be accurately identified.