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유압 브레이크 내 밸브의 거동이 적용된 휠 압력의 추정에 관한 연구
박기서(Giseo Park),한경석(Kyungseok Han),최세범(Seibum Choi) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
For chassis control of vehicle such as ABS, TCS and ESP, It is important to feedback exact braking torque which is proportional to wheel pressure. However, using wheel pressure sensor requires extra cost and has difficulty in installation. Therefore estimation of wheel pressure using observer algorithm which has compensation for error between measurement and estimated data is proposed in this paper. Braking situation includes conventional brake and brake with valve control. According to each braking situation, wheel pressure observer is operated actively with variable observer gain. This brake based on hydraulic system is possible to execute ABS algorithm. Also, on-off control valves which are economical and robust are used mainly. The simulation has been performed by using CARSIM which is well known as a vehicle dynamic simulator. Then, the result of comparing estimated wheel pressure with actual wheel pressure has been shown.