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[차량운동성능부문] 전기 조향 장치를 위한 조향휠 개발
정인용(Inyong Jung),박영진(Youngjin Park) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Conventional steering system has a mechanical connection between the driver and the front tires of the vehicle. but in steer by wire system, there is no such a connection. Instead, actuators, positioned in the vehicle's from comers receive input from the control module and turn the front wheels accordingly. In steer by wire system, steering wheel is an important pan that not only transfer driver's steering input to the controller but also provide road feedback to the driver's hand. Thus reactive torque actuator, providing road feedback, plays an important role in steer by wire system. In conventional steer by wire system a motor was used for reactive torque actuator. But using motor has some dis.1dvanlages such as oscillatory response, and inadequate acceleration of the steering wheel by the motor when driver's hands are released from steering wheel abruptly.<br/> In this study, we developed a semi-active steering wheel with two magneto-rheological brakes used for reactive torque generation to eliminate inherent safety problem of the motor based active steering wheel
드라이빙 시뮬레이터를 이용한 헤드램프 선행 평가 방안 연구
정인용(InYong Jung),전권수(KweonSoo Jeon),전재환(JaeHwan Jeon) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This paper presents the construction of virtual head lamp test using driving simulator. With this test, the photometric performance of the head lamp can be evaluated in the early stage of the vehicle development. In this paper, a method to predict the photometric performance of the head lamp using design specifications is developed and applied to visual program of driving simulator in order to construct virtual head lamp test system. This test system enables nighttime driving test without the influences of the noises from environment such as moonlight, streetlight, and road surface condition. At present, the head lamp development process using the proposed test system is established and applied to the development of vehicles.
전재환(Jaehwan Jeon),정인용(Inyong Jung),김봉수(Bongsoo Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, pre-collision safety technologies to enhance the vehicle stability and driver's safety have been developed in the automotive industry. This paper deals with the active brake control algorithm for collision warning and collision avoidance system. The control variables such as collision probability and required acceleration to avoid the collision can be calculated using the radar sensor and ESP sensors, and the entire driving conditions can be classified to several categories. According to this classification, the ABC(Active Brake Control) algorithm gives warning signals to driver, and if the situation goes to worse it automatically intervenes into the brake system to enhance the brake performance and prevent the accident. Furthermore, a new method to change the brake characteristics was introduced with the consideration of the driver's braking feeling. The performance and efficiency of the proposed ABC algorithm were proved using the Hyundai Sonata equipped with RCP(Rapid Control Prototype) environments.
차량 자세제어 장치를 위한 ECU in the Loop System 개발
백승환(Seunghwan Baek),박용섭(Yongsub Park),조봉근(Bonggun Cho),전재환(Jaehwan Jeon),정인용(Inyong Jung),김흥섭(Heungsub Kim),송정훈(Jeonghoon Song),부광석(Kwangsuck Boo) 한국자동차공학회 2007 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-
In this research, we have developed a system for ECU in the loop simulation to evaluate the performance of a vehicle dynamics controller which is a kind of active stability control units to control wheel slip and to improve steering stability of a vehicle on the road under rainy and snow conditions by controlling brake pressure and engine torque. To operate the VDC module, wheel speeds, a steering angle, master cylinder pressures, a yaw rate and a lateral acceleration of the vehicle and engine operation conditions are necessary as input information, then the brake pressures of each wheels could be calculated for keeping the vehicle stability in the module. The performance test of the developed system has been done according to JASO rules. We can get satisfied results of the developed ECU HILS through a series of experiments.
드라이빙 시뮬레이터를 활용한 차량속도에 따른 차간거리 허용한계치 원리연구
임성현(Sung-Hyun Lim),임형욱(Hyoung-Uk Lim),정인용(Inyong Jung),전권수(Kweons Jeon) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The purpose of the study is to investigate the minimal acceptable distance between two adjacent vehicles using a driving simulator. One factor within subject design was adopted for the experiment. As independent variable, the relative velocity between two adjacent vehicles was selected. The relative velocity had 5 levels: 0, 20, 40, 60, 80㎞/h. For the statistical analyses, the minimal acceptable distance between two adjacent vehicles and time-to-collision (TTC) were selected as dependent variables. The TTC means the value that the minimal acceptable distance divided by the relative velocity at the time that the driver started to press the brake pedal. Thirteen drivers participated in the experiment. The subjects were asked to drive at 100㎞/h and to press the brake pedal at the moment when he felt that the vehicle could collide with a preceding vehicle. The velocity of the preceding vehicle was randomly selected among 0, 20, 40, 60, 80㎞/h. The each treatment was repeated 3 times. The subjects drove a simulated track course for 15 minutes. The results showed that 1) the minimal value of the TTC at the moment when the subjects pressed the brake pedal was about 2 seconds, regardless of the relative velocities of two adjacent vehicles 2) as the relative velocity of two adjacent vehicles increased, the average value of the TTC decreased. The differences among driver’s braking behavior patterns were discussed
최종훈(Jonghoon Choi),김병주(Byungjoo Kim),김영재(Youngjae Kim),김형진(Hyungjin Kim),노윤갑(Yoonkab Noh),임동훈(Donghun Lim),정인용(Inyong Jung),정성기(Sungki Jung) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
The electronically controlled suspension with road preview is a system that recognizes a road shape in advance by using a front camera and navigation information. This system performs appropriate suspension control according to a type of road in front. When passing through the speed bump, the suspension control output is calculated according to the vehicle speed and the vehicle motion estimated by the acceleration sensor, and the same control performance is always achieved under the same driving conditions. However, riding comfort cannot be defined as one thing because there is a difference in what people feel. This study began with the consideration of how to reflect individual driver tendencies in suspension control in order to achieve better ride comfort.