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연규봉(Yeon, Kyu-Bong),정정화(Chong, Jong-Wha) 한국산학기술학회 2012 한국산학기술학회논문지 Vol.13 No.6
본 논문은 제동 시스템에서 전자식 주행안정 제어장치(ESC)의 유압 모듈레이터의 솔레노이드 밸브 제어에 대한 것이다. ESC의 전자제어유니트(ECU)를 제어하기 위한 방법으로 고주파수 제어와 슬로프 제어를 적용하였으며, 서지 압력 및 전자파간섭(EMI) 저감 특성을 연구하였다. 고주파수에서의 전자파 방출을 줄이기 위하여 ECU 출력 단 에 슬로프 제어 기능을 추가하였다. 측정결과 제동 시스템에서 고주파수 ECU의 솔레노이드 밸브제어 방법에 따라 서 지 압력과 전자파 방출이 저감될 수 있음을 확인하였다. 결론적으로 고주파수 ECU 제어 연구 결과에 의해 제동 시 스템 성능을 향상방안을 제시하고자 한다. This paper describes the control of a solenoid valve of ESC(Electronic Stability Control) with hydraulic modulator in braking system. ESC ECU(Electronic Control Unit) to control the high-frequency control and slope control method was applied, the surge pressure and EMI(electromagnetic interference) reduction characteristics were studied. The stage of ECU output was added the slope shaping function to reduce electromagnetic emission at higher frequencies. Measurements show that this high frequency ECU manages to reduce the surge pressure and electromagnetic emission by the control of solenoid valve. In conclusion, by using the results of this study for the high frequency ECU control, we could expect enhancement of braking system performance.
연규봉(Kyu-bong Yeon),이두호(Du-ho Lee),황윤형(Yun-hyoung Hwang),김병우(Byeong-woo Kim) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
In recent years there has been increasing public awareness about the impact of tire pressure levels on vehicle safety. Early warning of such safety related information could help a driver to avoid a potentially hazardous driving condition. This Paper provides an overview on the state of the art of intelligent tire system and MDPS system and potential technologies that can be utilized for sensor, wireless data transmission, and steering wheel vibration. Steering wheel vibration composed shimmy and shake mechanisms are investigated through vibration transfer path from road and wheel and tire to steering wheel. And experiment environment measure steering wheel vibration and tire pressure to improve of steering characteristic and compensate for defect of MDPS system.
연규봉(Kyubong Yeon),이두호(Duho Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
This paper proposes a possible automotive test environment for the verification of the in-vehicle network. The goal of the described test was to verify the reliability and efficiency of the in-vehicle network communication for a given system topology by injecting reproducible disturbances or diagnosis. Fault Injection is a fundamental step for testing network behavior and shall be done prior to the application development. First diagnostics information is an essential element for characteristic evaluation and fault determination of automotive ECU. Therefore, system verification can analyze by diagnostics signal and network disturbance of local interconnection network conformance test method. Therefore, the testing of the local interconnection network communication stability is vital for reliability and Fault Tolerance technique of high quality in Intelligent Vehicle.