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김성하(S. H. Kim),문덕홍(D. H. Moon),안영공(Y. K. Ahn),정석권(S. K. Jeong) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
This paper deals with vibration isolation of a functional fluid mount for precision equipment of automobiles. The functional fluids such as MR(Magneto-Rheological) and ER(Electro-Rheological) fluid have variable damping elements which are changed by variations of the applied magnetic field strength or electric field strength. we present the robust control scheme, based on conventional sliding mode control, for the design of a stable controller that is capable of isolating the vibration due to various disturbances such as bump and sinusoidal excitations, and is insensitive to parametric uncertainties of the functional fluid mount. The controller is then realized by using a semi-active control condition in simulations.
우민수(M.S.Woo),이경수(K.Yi),김성하(S.H.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_2
Collision warning/avoidance systems have the potential to substantially reduce the frequency and severity of accidents. The collision warning/avoidance systems, and adaptive cruise control systems are currently under development by most automotive manufacturers around the world. This paper presents a brake control for a collision avoidance(CA) system. The proposed brake control has been compared to a simple CA algorithm which use on/off binary brake control. Nonlinear control techniques have been used to minimize driver discomfort during braking in a CA system.<br/>
능동4륜조향장치의 이상상태 발생시 차량거동에 관한 연구
고영은(Y. E. Ko),김성하(S. H. Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
The failure of the 4WS (Four-Wheel-Steering) system is a very important problem in the 4WS vehicle because it might give a fatal injury to the driver. If the 4WS system fails, the vehicle would be so uncontrollable that there is a great possibility of a serious accident. So, the failure of the 4WS system is critical to the vehicle. There are two steps in preventing an accident caused by the failure. The first step is perceiving whether the failure happens or not, and the second is doing something properly not to happen an accident. In this paper, the methods of perceiving some failures and avoiding the accident of the vehicle are proposed assuming that the ECU of the system is operating normally.<br/> The simulation with MATRLXx is performed to verify the method of perceiving the failure, and the simulation with ADAMS to find the most appropriate way of avoiding the accident using full vehicle model.<br/> <br/>