Abstract
The steering reactive torque of an automobile is one of the important information for a driver to estimate vehicle behavior and road conditions. This paper describes enhancement of the execution period in steering torque simulator with multibody vehicle model. We considered the formulation of multibody dynamic analysis in steering torque simulator and embedded the matrix libraries to multibody dynamic analysis in steering torque simulator. This approach realized the stable analysis considering the nonlinearity of friction characteristics and so on. The runnning tests were conducted with developed simulator and the actual vehicle in order to evaluate the reality of the steering torque simulator.
