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황인용(Inyong Hwang),윤팔주(Paljoo Yoon) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
This paper presents the interim development results of the Hill Descent Control System(HDC)<br/> based on Mando Electronic Stability Program (ESP). HDC controls the speed of hill descent in<br/> 4WD vehicle so that a driver does not need to adjust his brake pedal even on steep and<br/> difficult terrain like gravel and snow. The downhill identification logic is investigated by using<br/> a longitudinal acceleration sensor and the estimated vehicle acceleration, and the simulation is<br/> carried out to establish the control strategy. Experimental results from a test vehicle in New<br/> Zealand Winter Test show that the robustness of the downhill detection and the performance of HDC are achieved.
홍대건(Daegun Hong),윤팔주(Paljoo Yoon),강형진(Hyung-Jin Kang),황인용(Inyong Hwang),허건수(Kunsoo Huh) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, wheel slip controllers with controlling the wheel slip directly has been studied using the brake-by-wire actuator. The wheel slip controller is able to control the braking force more accurately and can be adapted to various different vehicles more easily than the conventional ABS systems. The wheel slip controller requires the information about the tire braking force in order to achieve the control performance. In this paper, the tire braking forces are estimated considering the variation of the friction between brake pad and disk due to aging of the brake, moisture on the contact area or heating, and the robust wheel slip controller is designed using sliding mode control based on the estimated tire braking force. The performance of the proposed control system is evaluated in various simulations.