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SPMD장비를 활용한 초소형전기차 현가장치의 K&C 특성분석
김영렬(Youngryul Kim),김종수(Jongsu Kim),이준호(Junho Lee),이창노(Changro Lee) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
The ultra-small vehicle has a passenger-type and cargo-type depending on its use, and the width of the car is less than 1.5 meters, which is advantageous for driving on narrow roads in urban areas or rural areas. In particular, most ultra-small vehicles are electric vehicles driving by electric motors, and although regulations on vehicle certification have been in place for more than 30 years in Europe, laws were enacted in July 2018 and speed restrictions of less than 80 kph were imposed in Korea. Because of the size of the vehicle, the design freedom of the vehicle, such as the weight distribution of the vehicle related to the handling stability of the vehicle, the center of gravity of the vehicle and the inertial moment, and the type of suspension/steering system, is more disadvantageous than that of ordinary vehicles. In this study, various vehicle dynamics parameters produced by vehicle specifications, suspension and steering systems were measured through SPMD for the two types of ultra-small vehicles previously designed, and the values were compared with ordinary vehicles to identify inferior parameters and their degree of inferiority, and the selection of parameters to offset them and the design measures to implement them were established to contribute to the enhancement of handling stability of ultra-small cars.
김영렬(Youngryul Kim),김종수(Jongsu Kim),이준호(Junho Lee),이호영(Hoyoung Lee),권순오(Soono kwon) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11
When the in-wheel motor is applied to the vehicle, the differential gear and the drive shaft are removed, thereby increasing the spatial design freedom in the vehicle layout, and can also be used to control vehicle motion through independent torque control of the in-wheel motor. The point of design of the in-wheel motor is the harmonious and concise packaging of the surrounding components, such as suspension, brake, hub, and reduction gear, in a given space within the wheel. In particular, the inherent performance of the surrounding components shall not be reduced due to the mounting of the in-wheel motor. This study is about the design of the in-wheel motor for the rear wheels of a ultra-small electric truck, and the design of the in-wheel motor for vehicles with disc brake and torsion beam axle suspension. where the in-wheel motor was designed based on the excellent buried permanent magnetic motor motor in efficiency and size, and the reduction gear was applied with the planetary gear. In the primary design and manufacture of the motor, a motor with a small outer diameter and a long length in the axial direction of the motor was designed, but in the secondary design, the motor was able to increase the outer diameter of the motor and shorten the axial length of the motor by improving the packaging design with the brake caliper and packaging the reduction gear into the rotor of the motor.
[동력전달계부문] 하이브리드 연료전지 자동차의 HILS 응용
김영렬(Youngryul Kim),손영일(Young-il Sohn),송병석(Song Byung-Suk),하종배(Ha Jong-Bae),이각섭(Lee Gak-Sup) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper describes the real time simulation environment in order to develop and verify the power control algorithm for a hybrid fuel cell vehicle. All power systems involving VCU(vehicle control unit) are applied as a real hardware. On the other hand, the driver model and the longitudinal vehicle dynamics model are applied as a software. The driving load of vehicle obtained from the longitudinal dynamics is implemented by dynamometer.<br/> For carrying out Hardware-in-the-loop simulation test, the standard driving cycle applies FUDS(Federal Urban Driving Schedule) cycle and the power control algorithm of fuel cell system applies thermostat type and power follower type. From that, the fuel economy of both 10kw fuel cell and 25kw fuel cell is compared.
축소 모델 차량을 통한 자율 주행 차량의 경로 추종 및 장애물 회피 기법에 관한 연구
김동형(Donghyung Kim),김창준(Changjun Kim),김영렬(Youngryul Kim),한창수(Changsoo Han) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This paper presents a method that integrates the geometric path tracking and the obstacle avoidance for autonomous ground vehicle (AGV). AGV follows the path by moving through the turning radius given from the pure pursuit method which is the one of the geometric path tracking methods. As the AGV equipped with 2D laser scanner, the obstacle within the sensing range of 2D laser scanner, the virtual force is obtained. Therefore, the turning radius for avoiding the obstacle is calculated by inversely proportional to the virtual force. By integrating the turning radius for avoiding the obstacle and the turning radius for following the path, AGV follows the path and avoids the obstacle simultaneously. The effectiveness of the proposed method is verified through the real experiments using a scale-down vehicle.
차량 동역학을 고려한 무인 주행 차량의 경로 추종 및 장애물 회피 혼합 기법 개발
김동형(Donghyung Kim),김창준(Changjun Kim),미안 아쉬팍 알리(Mian Ashfaq Ali),김영렬(Youngryul Kim),한창수(Changsoo Han) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This paper presents a novel method that integrates the path tracking and the obstacle avoidance for UGV(Unmanned Ground Vehicle). Generally, for a safety and an ease control, UGV is used to runs slowly during the autonomous navigation. But if we want to run UGV fast, the vehicle dynamics should be considered. In this research, by using the bicycle model for the vehicle, the integrated method is applied to that model. For waypoints navigation, the pure pursuit path tracking is used. And this method is integrated with the obstacle avoidance method. The integrated method uses the obstacle potential that keeps UGV away from the obstacles while it follows the waypoints. The proposed method is tested on the simulation with several waypoints and obstacles showing that UGV is able to follow the path with obstacles.