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At the first step, I studied the driver model in the drift cornering. At the second step, I studied the technique by which the performance of running in the vehicle at the drift cornering was improved. I have understood the driver is steered by feed back the body slip angle and the body slip angle velocity at the drift cornering. Moreover, I have understood importance in the vehicle movement performance improvement the cornering force characteristic where the maximum cornering force of the tire was exceeded.
Hiromichi Nozaki (Tue,) studied this question.