ABSTRACTFor the vehicle stability control system, which improvesvehicle yaw stability for limit driving condition, accuratevehicle sideslip angle detection is one of key issues toconfirm the system performance. In this paper, anestimation method of vehicle sideslip angle is described.It is necessary that the vehicle sideslip angle estimationmust be robust against road surface condition change,road bank, sensor error, brake force effect, driver'soperation and so on. We have developed the sideslipangle estimation method for compensating the drivingcondition changes which disturb the sideslip estimation.The vehicle sideslip angle estimation using a combinationof vehicle model observer and pseudo integral isproposed. The vehicle model observer includes tire nonlinear characteristics for fitting actual tire characteristics.Moreover, road-tire friction, road bank and vehicle spinoutjudgments are developed for increasing the estimationaccuracy. The developed sideslip estimation method isevaluated through full-scale vehicle tests. It was verifiedthat this sideslip estimation experimentally confirms thesystem performance and robustness
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