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Vehicle Dynamics Simulation을 위한 가상 차량 모델 Parameterization 방법론 연구
임병호(Byungho Im),서지원(Jiwon Seo),한민규(Mingyu Han),안민회(Minhoe Ahn),김종관(Jongkwan Kim) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
HILS has been widely used for development and verification of chassis products including controllers. In particular, it has been mainly used as a communication simulation environment for fault detection. In this paper, in order to reduce the EPS product development verification time, cost and risk of the development vehicle, we will discuss the method of acquiring the parameter data of the virtual vehicle model required in the EPS HILS verification environment and verifying the validity.
ESC시스템을 위한 Dry Type HILS (Hardware in the Loop Simulation) 개발
손창현(Changhyun Son),이동환(Donghwan Yi),임병호(Byungho Im),이세진(Sejin Lee) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
HILS test method is generally useful for the ESC system validation. Recently trends in development of the ESC system are the rapid development of the software such as VAFs(Value Added Functions), and the integrated chassis control system development. The dry type HILS is the effective method to validate ESC system without the HCU hardware during quickly proceeding with the development process, and the interaction of the integrated chassis system without the each actuator hardware. In this paper the dry type HILS for the ESC system is proposed with the direct measurement approach of ECU coil’s current and the motor BEMF voltage control simulator. The paper investigates the dry type HILS system design based on the important technology, and the designed dry type HILS is verified though the simulation using real ECU. Also, in order to verify the coil’s current measurement reliability, the measurement result is compared to oscilloscope data.
申東信,林炳浩 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1
This paper investigates the linear stability of wakes with special emphasis on the difference of velocity and density. Velocity and density profiles for laminar flows have gaussian profiles. Incompressible wakes have two generalized inflection points and two unstable modes-sinuous and varicose modes. Sinuous modes are more unstable than varicose modes irrespective of density variation, which shows wakes will be destabilized by sinuous modes. Large velocity difference and density difference lead to more unstable wakes due to large momentum difference.