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손민혁(Minhyuk Son),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This paper describes the method of control allocation for chassis stability control system and study of stability region of driving vehicle. As the vehicle stability enhancement, unified chassis control system is developed by integration of a individual controller. Moreover original ability, these systems are used for vehicle behavior control by brake pressure control, superimposed steering, active damping control. Most of these systems composes that choice the reference parameter and control that minimize the error between reference and actual parameter, but effects of control input to vehicle stability is still unclear. In this paper will present control allocation contributions to vehicle stability. Consequently, these control input guarantee the stability region, while satisfying all actuator constraints.
윤민섭(Minseob Yoon),김현수(Hyunsoo Kim),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 한국자동차공학회 2011 한국자동차공학회 학술대회 및 전시회 Vol.2011 No.11
Recently the automotive industry to predict the risk factors with the sensor to the driver in an accident be avoided by delivering systems that are now underway to study through a combination of various sensors and car, and that during the course of study as part of the study vehicle"s blind-spot detection system is actively underway. Intelligent sensors developed in this study of 15˚ ~ 45˚ vehicle blind spot region is recognized by the infrared sensor. In order to increase the sensitivity of the sensor to receive infrared signals mixed with the carrier frequency and the center frequency of the signal consists of a mixed-frequency sensitivity and improved features. SILS environment was built according to international ISO standards based on specifications and configuration of presented BSDS. The environment of the road was built using PreScan and Matlab / simulink was configured using the control logic. In order to verify the applicability of the developed BSDS system, BSDS systems receive information of vehicle distance, steering angle, speed such as actual driving conditions. The applicability of the system presented safe conditions and accident situations by a visual representation and data.
차량 안정성 제어 시스템을 위한 차량 모델의 안정성 영역 해석
손민혁(Minhyuk Son),윤득선(Duksun Yun),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This paper describes the design of a unified chassis control system and study of control input affects the vehicle dynamic stability. As the vehicle stability enhancement, unified chassis control system is developed by integration of a individual controller. Moreover original ability, these systems are used for vehicle behavior control by brake pressure control, superimposed steering, active damping control. Most of these systems composes that choice the reference parameter and control that minimize the error between reference and actual parameter, but effects of control input to vehicle stability is still unclear. This paper examine the parameter affects the vehicle stability with Lyapunov’s direct method and Topological method under several driving condition. Consequently, these control input guarantee the stability region, while satisfying all actuator constraints.
윤민섭(Minseob Yoon),김현수(Hyunsoo Kim),제우성(Wooseong Che),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The latest vehicle yields a superior safety and reduction of driving burden by monitoring the driving state of vehicle and its environment with various sensors. To detect other vehicles and objects of the rear left and right-side blind spot area of driver, provide the information about a existence of objects inside the blind spot, and give a signal to avoid collision, this study proposes the intelligent outside rear-view mirror system. This task has substantially complicated several factors. For example, the size, geometry and features of the various vehicles which might enter the monitored zone is varied widely and therefore present various reflective characteristics. This study proposes the optimal specification and configuration of optical system and IR array sensor of blind spot detection system, and shows the results of the performance evaluation of developed system.
〈학술논문〉브레이크 스퀼 해석에서 패드 마모의 영향에 관한 연구
이호건(Hogun Lee),김종환(Jonghwan Kim),손민혁(Minhyuk Son),서영욱(Youngwook Seo),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5
This paper studies the effect of pad at initial stage and wear during braking on the dynamic contact pressure distribution. Wear is influenced by variable factor (Contact pressure, sliding speed, radius, temperature) during dynamic braking and variation in contact pressure distribution. Many researchers have conducted complex eigenvalue analysis considering wear characteristic with Lim and Ashby wear map. The conventional analysis method is assumed the pad has smooth and flat surfaces. The purpose of this paper is to validate that wear rate induced by braking is considered for the precise squeal prediction. After obtaining pad wear from experiment, it is incorporated with FE model of brake system. Finally, the comparisons in fugitive nature of squeal will be carried out between the complex eigenvalue analysis and noise dynamometer experiment.
박장수(Jangsoo Park),윤민섭(Minseob Yoon),김현수(Hyunsoo Kim),제우성(Wooseong Che),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
The purpose of this paper is to compare with estimation of equivalent fatigue load in time domain and frequency domain. The fatigue analysis for random loads is discussed in several papers. In general, Equivalent fatigue load in time-domain is estimated by rainflow cycle counting. In case of frequency domain, it can estimate through probability density function of Dirlik’s method that directly use power spectrum density of stress. Probability density function of Dirlik’s method is function of spectral moment only. For verification of performance with two methods, simulations is performed with general random signal and FEM analysis.
최정광(Jungkwang Choi),윤문영(Moonyoung Yoon),정재업(Jaeeop Jung),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
Recently the automotive industry to predict the risk factors with the sensor to the driver in an accident be avoided by delivering systems that are now underway to study through a combination of various sensors and car, and that during the course of study as part of the study vehicle’s blind-spot detection system is actively underway. Intelligent sensors developed in this study of 15°~45° vehicle blind spot region is recognized by the infrared sensor. In order to increase the sensitivity of the sensor to receive infrared signals mixed with the carrier frequency and the center frequency of the signal consists of a mixed-frequency sensitivity and improved features. SILS environment was built according to international ISO standards based on specifications and configuration of presented BSDS. The environment of the road was built using PreScan and Matlab / simulink was configured using the control logic. In order to verify the applicability of the developed BSDS system, BSDS systems receive information of vehicle distance, steering angle, speed such as actual driving conditions. The applicability of the system presented safe conditions and accident situations by a visual representation and data.
이호건(Hogun Lee),손민혁(Minhyuk Son),서영욱(Youngwook Seo),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 대한기계학회 2008 大韓機械學會論文集A Vol.32 No.11
This paper studies the effect of pad at initial stage and wear during braking on the dynamic contact pressure distribution. Wear is influenced by variable factor (contact pressure, sliding speed, radius, temperature) during dynamic braking and variation in contact pressure distribution. Many researchers have conducted complex eigenvalue analysis considering wear characteristic with Lim and Ashby wear map. The conventional analysis method is assumed the pad has smooth and flat surfaces. The purpose of this paper is to validate that wear rate induced by braking is considered for the precise squeal prediction. After obtaining pad wear from experiment, it is incorporated with FE model of brake system. Finally, the comparisons in fugitive nature of squeal will be carried out between the complex eigenvalue analysis and noise dynamometer experiment.