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전차륜 독립휠 구동 및 조향 제어 기반 특수목적용 6WD/6WS 차량의 주행제어 알고리즘 연구
이대옥,여승태,Lee, Daeok,Yeo, Seungtai 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.3
This paper discusses the maneuvering control algorithm based on all-wheel independent driving and steering control techniques for special purpose 6WD/WS vehicles. The maneuvering control algorithms considering superior dynamic characteristics of high power in-wheel motors and independent steering system are designed to perform driving, steering, vehicle stability, and fault tolerant control. The maneuvering controller applies sliding and optimal control theories considering optimal torque distribution and friction circle related to the vertical tire force. The fault tolerant control algorithm is applied to obtain the similar maneuverability to that of the non-faulty vehicle. The simulations using the Matlab/Simulink dynamics model and experiments using HIL simulator mounting the real controllers with the designed control algorithms prove the improved performances in terms of vehicle stability and maneuverability.
4륜구동 직렬형 하이브리드 전기추진시스템의 구성품 용량 최적화 연구
장명언,정순규,한규홍,여승태,Jang, Myeong-Eon,Jeong, Soon-Kyu,Han, Kyu-Hong,Yeo, Seung-Tai 한국군사과학기술학회 2014 한국군사과학기술학회지 Vol.17 No.2
The study is conducted on the subject of optimization of components sizing for series hybrid electric propulsion systems. The components sizing of series type hybrid system is very important because each component of series type is larger than the corresponding component of the parallel type or series-parallel type. If the components sizing is greater or less than what is required to this system, the performance of the system is getting worse. The methodology for the sizing of a driving motor is introduced based on the foundation of determined system configuration and performance target. And the sizing of an engine/generator and a battery is achieved based on simulation results using Dynamic Programming. It is possible to find the optimal sizing of these components by comparing fuel efficiency of hybrid electric propulsion system for 8 driving cycles.
6륜 전기구동 차량의 구성품 최소 용량 선정과 주행 성능 분석
한규홍(Kyuhong Han),여승태(Seungtai Yeo) 한국자동차공학회 2018 한국자동차공학회 학술대회 및 전시회 Vol.2018 No.11
Based on critical factors related to requirements, a reasonable design procedure is proposed to determine the minimum power capability of the components of a hybrid electric driving vehicle such as a battery, an electric motor, and an engine/generator. In this study, the procedure to satisfy the essential target driving performance is adapted for a six-wheeled hybrid electric driving vehicle of military application. And with a longitudinal vehicle dynamics, vehicle performance is analyzed to judge whether the target vehicle composed of the components of the selected size satisfies the target driving performance.
임무장비를 고려한 직렬형 하이브리드 차량의 추진시스템 최적화 연구
장명언,김상만,한규홍,여승태,Jang, Myeong-Eon,Kim, Sang-Man,Han, Kyu-Hong,Yeo, Seung-Tai 한국군사과학기술학회 2013 한국군사과학기술학회지 Vol.16 No.2
In this paper, the study was conducted on the subject of the hybrid electric vehicles used by the military, and optimized the propulsion system for fuel economy considering energy supply to the mission equipments. For the analysis of the vehicles, a method based on the geometry and some assumptions was applied with basic vehicle dynamics. The sources of energy supply in the military hybrid electric vehicles are an engine, a battery and an ultra-capacitor. The optimal operation point among an engine, a battery and an ultra-capacitor can be found by minimizing energy consumption of driving power train and mission equipments. In the study, it was possible to find the optimal propulsion system by comparing fuel efficiency of the vehicles during the driving cycle.
Dynamic Programming 기반의 군용 하이브리드 추진시스템 특성 연구
장명언(Myeong-Eon Jang),김상만(Sang-Man Kim),한규홍(Kyu-Hong Han),여승태(Seung-Tai Yeo) 제어로봇시스템학회 2012 제어로봇시스템학회 합동학술대회 논문집 Vol.2012 No.7
In this paper, the study was conducted on the subject of the hybrid electric vehicles used by the military, and analyzed the energy sources for fuel economy considering energy supply to the mission equipments. For the analysis of the vehicles, a method based on the geometry and some assumptions was applied with basic vehicle dynamics. The sources of energy supply in the military hybrid electric vehicles are Engine, Battery and Ultra-capacitor. The optimal operation point between Engine, Battery and Ultra-capacitor can be found by minimizing energy consumption of driving powertrain and mission equipments. Using fuel efficiency of the vehicle during the driving cycle, it was possible to analyze the character of energy sources.
김원서(Won-Seo Kim),홍지태(Jitae Hong),이대옥(Daeok Lee),여승태(Seungtai Yeo) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
자동차 산업은 기존의 기계 또는 유압으로 제어하던 스티어링 휠이나 브레이크 등의 장치들을 네트워크 기술을 이용하여 전자적으로 제어하는 X-by-wire 시스템으로 진화하고 있다. 이 중, Steer-by-wire 시스템은 스티어링 컬럼 등을 제거하여 실내 공간 을 확보하였으며 차량의 주행제어와 연동하여 주행 안정성을 향상시킬 수 있는 장점을 가지고 있다. 또한, 특수 목적 차량의 경우 전(前)륜 뿐 아니라 모든 휠을 조향하는 전(全)륜 조향을 통해 기본 조향 이외에 여러 조향 모드를 구현할 수 있으며 각 휠의 독립적인 조향으로 다양한 효과를 기대할 수 있다. 특수 목적 차량은 더욱 다양한 운용환경이 발생하기 때문에 독립 조향 시스템과 인휠 구동장치를 사용하는 독립 구동 시스템을 동시에 적용하였을 때 제자리 조향과 같은 특수 조향이 가능하게 되어 그 효과를 극대화할 수 있으며 독립 구동과 조향의 통합 제어를 통하여 차량의 고속 주행 안정성 및 빠른 기동 성능을 확보하여 생존력을 향상시킬 수 있다. 본 논문에서는 6륜의 독립 조향이 가능한 Steer-by-wire 시스템과 6륜의 독립 구동이 가능한 인휠 구동장치를 사용한 시험차량을 시험하여 독립조향과 독립구동을 통해 얻어지는 다양한 조향모드를 시험하고 각 조향모드의 기본적인 조향성능을 비교하였다.