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김두형(Duhyung Kim),정태영(Taeyoung Chung),오세욱(Sewook Oh),고상진(Sangjin Ko),여태정(Taejung Yeo) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This article proposes the integrated control system of ESC(Electronic Stability Control) and MDPS(Motor Driven Power Steering), called MICS(E+M)(Mobis Integrated Control System, ESC+MDPS), simultaneously improving vehicle stability and handling performance with reduced ESC intervention. The MICS(E+M) changes the steering characteristics of MDPS under some unstable situations as understeer or oversteer. It can give drivers a feedback of driving condition and lead them to do counter-steering maneuver toward proper direction by changing an assistant steering torque of MDPS. Vehicle test results show the proposed integrated control system enhanced the stability and handling of vehicle effectively in several driving maneuvers.
윤장열(Jangyeol Yoon),김두형(Duhyung Kim),차종조(Chongjo Cha),정태영(Taeyoung Chung),여태정(Taejung Yeo) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper presents a vision based Lane Following Control System (LFCS) and the experimental results of field operating test. The LFCS is more advanced and complicated system than the Lane Keeping Assist System (LKAS) which is in mass production. The proposed LFCS is designed based on the model predictive control method which includes the relation of vehicle and road. A steering torque is derived in real-time to follow the lane center line by using parameters which are acquired from camera. The performance of the proposed LFCS is evaluated via computer simulations and field test. It is verified that the proposed LFCS can be helpful for reducing the driver’s workload and can assist the driver during driving.
정태영(Taeyoung Chung),김두형(Duhyung Kim),양승훈(Seung-Hoon Yang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In the case of a full-braking on a split-mu road, the ABS (Anti-lock Brake System) controller should make a compromise between a braking performance and a lateral stability of the vehicle. It depends on vehicle characteristics of lateral behavior and the needs of a vehicle designer. By adding steering torque properly, ESC (Electronic Stability Control) and MDPS (Motor Driven Power Steering) integrated control system makes a driver steer to the right direction, and even reduces braking distance. Although the system does not improve vehicle behavior directly, it can inspire drivers to steer to the right direction by changing steering torque assistance characteristics. The test results show that the proposed system assists a driver well to keep the lane, improves braking performance, and ensures hands-off stability on the split-mu full braking.
유승진(Seungjin Yoo),유승한(Seung-Han You),김두형(Duhyung Kim),이교일(Kyo Il Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
We investigate an optimal integrated control of the vehicle equipped with active steering system and independent braking system. The proposed controller uses DYC(Direct Yaw moment Control) and active 4WS(4 wheel steering) simultaneously to improve the handling and stability of vehicle. A model following robust controller that specifies the required yaw moment and total lateral tire force is designed though LMI(Linear Matrix Inequality) formulation. To generate the target steer angles and reference brake pressures in each 4 wheel, the control allocation method is synthesized via quadratic programming. Simulation results show that the proposed integrated controller enhances the stability and handling of vehicle effectively in several driving maneuvers.