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[I.T.S.부문] 유압 브레이크 시스템 모델링 및 실차실험을 통한 모델 검증
민석기(Sukki Min),이경수(Kyongsu Yi) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.11_1
In this paper we propose two brake models and present experimental results using a specially equipped test vehicle. Modeling of vehicle dynamics playa crucial role to develop vehicle speed and vehicle-to-vehicle distance control algorithm for stop-and-go cruise control system. Since evaluation of controllers on the test road is very expensive, a good model should make control problems explicit, provide sufficient fidelity for simulation and be simple enough to provide a basis for model based controllers. Hydraulic brake system has a lot of control problems such as nonlinearities, disturbances and uncertainties. In this study, hydraulic brake system is modeled from fundamental principles by assuming incompressible flow and another one represents simple 2nd -order filter from master cylinder to wheel caliper based on experimental results.
민석기(Sukki Min),이재관(Jaekwan Lee),김병수(Byoungsoo Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The results that has discussed in this paper are related to the development of pre-Crash Safety System that is an application of Advanced Safety Vehicle (ASV) to enhance driving convenience and safety. Pre-Crash Safety System is all active safety system aimed to mainly prevent the occurrence of accident and finally reduce the damage of passenger caused by an avoidable collision. It is researched to predict an avoidable collision by sensor and actuate the motorized seat belt in order to improve initial restraint performance and optimize occupant position in advance of collision. Laser radar sensor is applied to achieve the clearance and relative velocity between front vehicle and subject vehicle. Stopping distance algorithm is used in this project to determine the event of collision warning.
최재웅(Jaewoong Choi),허현동(Hyundong Her),민석기(Sukki Min),김종갑(Jongkap Kim),이경수(Kyongsu Yi) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
긴급 주행 보조 시스템은 MDPS와 ESC를 활용하여 운전자의 충돌 회피를 보조한다. 운전자가 조향 입력을 통하여 충돌을 회피하려 할 경우, 긴급 주행 보조 알고리즘은 작동한다. 긴급 주행 보조 알고리즘은 총 4개 파트로 구성되어 있는데, 이는 각각 위험 인지, 운전자 의도 판단, 제어 전략 결정, 제어 이다. 위험 인지 단계에서는 현재 상황 위험성과 위험 영역을 도출하며, 운전자 의도 판단의 경우 운전자가 조향 입력을 통하여 충돌 회피를 하려는 것인지 판단한다. 제어 전략 결정 단계에서는 제어 동작 여부와 사용할 엑츄에이터를 결정하며, 제어 단계에서는 각 엑츄에이터의 제어량을 결정한다. 제시된 알고리즘은 차량 동역학 시뮬레이션 소프트웨어 CARSIM과 MATLAB/SIMULINK를 활용하여 시뮬레이션하였다. Emergency driving support (EDS) algorithm supports the driver to avoid collision using motor driven power steering (MDPS) and electronic stability control (ESC). If driver try to avoid rear-end collision using steering input, the EDS system activated and support the driver. The EDS algorithm consists of 4 parts: risk monitoring, driver monitoring, decision and control. In risk monitoring process, inverse time-to-collision is used for risk monitoring and danger area is estimated. In driver monitoring process, driver’s intention in emergency situation is estimated. In decision process, the control policies are determined. Finally, in control process, the control inputs of actuators are determined. The performance of proposed algorithm has been investigated via computer simulation conducted to vehicle dynamic software CARSIM and Matlab/Simulink.
문일기(Il-ki Moon),이재관(JaeKwan Lee),민석기(Sukki Min),이건복(Gunbok Lee),이경수(Kyongsu Yi) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In practical applications, most of front vehicle detection sensors cannot return clear signals because of an environment of randomly distributed clutter. Interacting multiple model - Probabilistic data association filter(IMM-PDAF) algorithm has a good multi-target tracking performance and a bounded computational load. A multi-target collision warning application using multiple model probability of IMM-PDAF is presented in this paper.