http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Levenberg-Marquardt Algorithm을 이용한 공압식 능동형 엔진 마운트 시스템의 제어성능 맵
김일조(Il-Jo Kim),이재천(Jae-Cheon Lee),이우현(Woo-Hyun Lee),김정훈(Jeong-Hoon Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
Low-cost active control engine mount has been developed and used for cars by Japanese automotive companies, such as Toyota and Honda Motor Corporation, since the late of 1990's, but active engine mount (ACM) is not commercialized in Korea. This paper studied on map of control performance of feedforward type for a pneumatic active engine mount(PAEM) using pneumatic solenoid valve. The experiment was fulfilled in the idle state of an variable geometry turbocharger(VGT) diesel. It is difficult to construct accurate model of the vibration transmission system due to its high level of non-linearity and time variable. In this study, the system identification is performed to find accurate optimal control parameters by using multi-layer neural network based on the experimental data. The leaning method for neural network parameters is adopted Levenber-Marquardt Algorithm(LMA). The real vehicle which is installed ECU for PAEM control was tested on the condition of various idle control modes. The model of rapidly calculating the optimal two parameters, the time delay and duty ratio of pulse width modulation(PWM) signal, was developed.
다층 신경망 회로를 이용한 공압식 능동형 엔진마운트의 최적제어인자 확인
김일조(Il-Jo Kim),이재천(Jae-Cheon Lee),이우현(Woo-Hyun Lee),김정훈(Jeong-Hoon Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Engine vibrations spread in all directions of vehicle through the engine mount which locates between engine and the vehicle body. Therefore, the vibration isolation performance of the engine mount is quite important to increase the comport of a vehicle. This paper proposed the pneumatic active engine mount(PAEM) and its control algorithm to reduce the transmission of the vibration induced by an engine. A scanning algorithm of control parameters of time delay and duty ratio of PWM signal into the solenoid valve of PAEM was applied in vehicle test. Then the system identification is fulfilled to find accurate optimal control parameters by using multi-layer neural network based on the experimental data.
정희식(HS Chung),김영수(YS Kim),정원태(WT Chung),김일조(LJ Kim) 대한산부인과학회 1969 Obstetrics & Gynecology Science Vol.12 No.1
A case of dysterminoma of the ovary in a 24-year old woman is reported. And the literatures on dysterminoma of the ovary are reviewed briefly.