Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)
- Volume 9 Issue 2
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- Pages.176-184
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- 2001
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- 1225-6382(pISSN)
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- 2234-0149(eISSN)
Estimator Design for Road Friction Coefficient and Body Sideslip Angle for Use in Vehicle Dynamics Control Systems
차량 동역학 제어기를 위한 노면 마찰계수 및 차체 미끄럼각 추정기 설계
Abstract
The VDC(Vehicle Dynamics Control) is a control system whose target is to improve vehicle stability under critical motion. The system has a good potential of becoming a standard active safety unit in passenger vehicles since it can be implemented on top of the ABS/TCS system with little extra cost. This, however, is possible only when the signals that the VDC system demands can be obtained with sufficient accuracy. In this research, estimators for the road friction coefficient and body sideslip angle have been designed. The two variables have great influence upon performance of the VDC system but not directly measurable. For the estimator design, the Newton method and the nonlinear observer theory have been exploited. The performance of the estimator have been verified via simulations on critical driving conditions.