Mitsubishi Electric ADVANCE Vol132 05

1. Introduction In general, on a snow-covered or otherwise slippery road, an abrupt steering change will cause unstable vehicle behavior, or excessive speed will make the vehicle deviate from the intended path. The vehicle stability control (VSC) system detects such conditions and stabilizes the vehicle. Although the use of VSC has begun to increase, it is not yet widely seen in inexpensive cars, partly because of its high cost. This paper proposes a low-cost method for estimating the tire-road friction coefficient using only standard signals from the sensors installed in the electric power assist steering (EPAS) system.