http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
다중 망각 인자 회기 최소 법을 이용한 차량의 질량과 노면의 기울기 실시간 추정에 관한 연구
윤용순(Yongsoon Yoon),박영주(Youngjoo Park),김현진(Hyounjin Kim) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
Precise estimation of vehicle mass and road grade are crucial issues in longitudinal control of automotives, such as drivability, traction, or cruise control. Since these two parameters are not governed by any physical rules, some methods such as Kalman filter and observer are inefficient for good estimates. In this paper, a recursive least square method using multiple forgetting factors is implemented to the longitudinal vehicle dynamics for fast online estimation of time-varying parameters, vehicle mass and road grade. Efficacy of the estimation method is substantiated from the experimental simulation in the view of robustness under the uncertainty.
Torque Profiling을 사용한 모델 예측 Anti-Jerk 제어
윤용순(YongSoon Yoon),김연규(YeonKyu Kim),박영주(YoungJoo Park),김현진(HyounJin Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
When drivers demand sudden change in torque request by abrupt pushing or releasing an accelerating pedal, like tip-in/out, drivers experience uncomfortable vibration called jerking. This undesirable oscillation is attributable for torsion of a driveshaft connecting a flywheel of an engine and an axle of wheels. Although, in the view of comfort, artificial torque reduction using an electronic controlled throttle valve alleviates vibration of driveshaft, excessive reduction deteriorates a power of acceleration. In this paper, model predictive anti-jerk control in order to suppress undesirable vibration will be presented using torque profiling as a feed-forward control concept. In the proposed algorithm, torsion angle and its rate are considered as reference values to be tracked by feedback control while taking account of relevant input dead segment of an internal combustion engine. Simulation results show that the suggested model predictive anti-jerk control (MPAJC) suppresses the vibration in driveline efficiently with ramp-type torque profiling while avoiding a critical loss of accelerating power.