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Proposals for Improvement of AFS System Using HIL & SIL Simulation
Seungkyu Oh,Hyoungsoo Kin,Jinhee Jang 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper presents proposals of performance improvement of AFS(Active Front Steer) system. AFS system is a subsystem of UCC(Unified Chassis Control) system which is composed of AFS, ESC(Electronic Stability Control), EAS(Electronic Air Suspension) systems. In this paper, AFS system is focused and proposals for AFS system performance improvement are introduced. First, configurations, functionalities and control algorithms of AFS system are introduced by literature survey & benchmarking test results. Through these results AFS system control algorithm is proposed. And this algorithm is developed and validated using SIL(Software in the loop) simulation. Finally, this AFS control algorithm is validated using HIL(Hardware in the loop) simulator. And concept and configuration of this HIL Simulator is introduced. With this HIL simulator not only AFS system performance but also UCC system performance is evaluated.
Development of HIL Simulator for UCC System
SeungKyu Oh,Kangwon Lee,Jihoon Roh,Myungchul Jung,Youngwoo Kim,Jinhyun Ahn,Hyoungsoo Kim,Jinhee Jang 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In these days, most of all motor companies are trying to reduce development time and cost. They use a lot of ways to solve these problems. One of the solutions is a HIL (Hardware-In-the Loop) Simulator. In this paper, HIL Simulator which is consistent with GMDAT RLM (Road to Lab to Math) Strategy is proposed. And this HIL Simulator is developed to be suitable for UCC (Unified Chassis Control) system development. The important advantages of HIL Simulator are that it can be possible to substitute road tests by virtual tests and to modify the control algorithm easily. In this UCC system, AFS (Active Front Steering) system and Air Suspension system is integrated in ESC (Electronic Stability Control) system. It is revealed that UCC system which includes AFS system, ESC system and Air suspension system has quite obviously a lot of synergy among the chassis control subsystems by previous studies. To develop UCC HIL Simulator, there are several steps. There are target vehicle modeling. vehicle model verification, configuration of S/W & H/W and application. Using this HIL Simulator, it can be easily develop, evaluate and validate control algorithm and H/W performance. And subjective and objective tests can be possible using steering system and brake system H/W, additional equipments and CarSim & MATLAB/Simulink® S/W. Finally, using this HIL Simulator, it can be achieved UCC system efficiently.
어드밴스드 에어백에 있어서 패턴인식 승원분류시스템의 개발
오승규(SeungKyu Oh),김도윤(DoYun Kim),황재호(JaeHo Hwang) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.5_2
As injuries induced by airbag deployment had become a critical issue, revisions to FMVSS 208 were made to mandate the introduction of advanced airbag which can protect occupants of varying statures. In this paper, To achieve this goal was introduced OCS(occupant classification system) to specification and system structure. Therefore, This paper presents an overview of current OCS technologies and pattern recognition type OCS.
오승규(SeungKyu Oh),김도윤(DoYun Kim),금명훈(MyoungHun Keum),황재호(JaeHo Hwang) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
As injuries induced by airbag deployment had become a critical issue, revisions to FMVSS 208 were made to mandate the adoption of advanced airbag which can protect occupants of varying statures. As a result, OCS(occupant classification system) has become a crucial factor in advanced airbag technologies. This paper presents an overview of current OCS technologies and a license trend of occupant sensing.
오승규(Seungkyu Oh),이강원(Kangwon Lee),이종일(Jongil Lee),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
This paper presents results of performance evaluation of UCC(Unified Chassis Control) system and subsystems. UCC system is composed of ESC(Electronic Stability Control), AFS(Active Front Steer) and EAS(Electronic Air Suspension) system. Each subsystem functionality is presented by literature survey and benchmarking. And each subsystem and UCC functions are evaluated. Vehicle tests are performed with high/low friction surface and various vehicle speed. And vehicle model is developed for SIL(Software in the Loop) simulation. Vehicle parameters are measured with specific facilities and realized with vehicle dynamics analysis software. HIL(Hardware in the Loop) simulator is developed with realtime HIL simulator, UCC subsystem hardware and software model including vehicle model. In this paper, not only vehicle performance evaluation results but also vehicle modeling process and HIL simulator development process. SIL and HIL simulation is also used for UCC and subsystem performance evaluation. At last, UCC control strategies and future work for mass production are presented.
HIL & SIL Simulation을 이용한 AFS System의 성능 향상을 위한 제안
오승규(Seungkyu Oh),노지훈(Jihoon Roh),이강원(Kangwon Lee),이종일(Jongil Lee),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
This paper presents proposals of performance improvement of AFS(Active Front Steer) system. AFS system is a subsystem of UCC(Unified Chassis Control) system which is composed of AFS, ESC(Electronic Stability Control), EAS(Electronic Air Suspension) systems. In this paper, AFS system is focused and proposals for AFS system performance improvement are introduced. First, configurations, functionalities and control algorithms of AFS system are introduced by literature survey results. Through these results AFS system control algorithm is proposed. And this algorithm is developed and validated using SIL(Software in the Loop) simulation. Finally, this AFS control algorithm is validated using HIL (Hardware in the loop) simulator. And concept and configuration of this HIL Simulator is introduced. With this HIL simulator not olny AFS system performance but also UCC system performance is evaluated.
Mini-Spare 타이어를 고려한 ESC 성능변화에 관한 연구-1
오승규(Seungkyu Oh),이종일(Jongil Lee),이강원(Kangwon Lee),노지훈(Jihoon Roh),김영우(Youngwoo Kim),김형수(Hyoungsoo Kim),김인동(Indong Kim),장진희(Jinhee Jang) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
Temporary mini-spare tires are common standard equipment on motor vehicles while run-flat tires and tire repair kit are offered as standard equipment on some motor vehicles. This paper describes ESC (Electronic Stability Control) system performance with mini spare tire equipment in winter test site. ESC system should recognize mini spare tire equipment location within specific time and control brake pressure properly to control vehicle understeer and oversteer. ESC performance changes due to mini spare tire location. In this paper, worst case for mini spare tire location is found with subjective and objective evaluation. The principle conclusion of this paper is ESC system should have characteristics that do not degrade low coefficient handling and stability even if mini spare tire location affects vehicle performance.
오승규(SeungKyu Oh),황재호(Jaeho Hwang) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
최근의 시트의 개발은 승객의 안전과 편의성의 증대에 많은 기술이 발전되고 있다. 특히, 승객의 착좌 거동자세를 판별하여 에어백을 제어하는 승객식별장치, 액티브 헤드레스트와 같은 안전시스템과 시트히터 및 파워시트 등 다양한 옵션의 편리성을 갖는 시트의 안전화 및 전자화가 빠르게 진전되고 있다. 본 논문에서는 이러한 시트의 최근의 동향을 논하고자 한다. Recently, due to technological evolutions and social demands, automotive seats are much enhanced in terms of occupants safety and convenience. As a result, the option rates are rapidly growing especially for occupants protection systems and electronics systems. This paper presents an overview of current evolution on seat technologies covering the safety devices as OCS(occupant classification system) and active head restraint system.
옥승규(Seungkyu Ock),양오(Oh Yang) 大韓電子工學會 2010 電子工學會論文誌-SD (Semiconductor and devices) Vol.47 No.1
본 논문에서는 FPGA와 VHDL을 이용하여 다채널 비동기 통신용 IC를 설계하였다. 기존에 상용되고 있는 대부분의 비동기 통신용 IC들은 최대 1~2채널(Channel)로 구성되어 있다. 따라서 2채널 이상의 통신 시스템을 구성할 때 원가가 높아지고 구현하기도 복잡해진다. 그리고 매우 적은 송수신 버퍼(Buffer)를 가지고 있으므로 고속으로 대용량의 데이터를 전송할 경우 마이크로프로세서에 걸리는 부하가 많아지게 된다. 이러한 문제를 해결하기 위해 본 논문에서는 비동기 통신 채널 8개를 단 한개의 IC로 설계하여 원가 절감 및 기능과 성능을 향상 시키도록 설계하였으며, 송수신 버퍼의 크기를 각각 256 바이트로 설계함으로써 고속의 통신을 가능하게 하였다. 또한 통신시 오동작을 방지하기 위해 디지털(Digital) 필터 및 첵섬(Check-sum) 로직을 설계하여 신뢰성을 향상시켰으며, 채널 먹스 로직을 설계하여 각 채널별 입/출력을 자유롭게 선택하도록 하여 통신 채널에 대한 입/출력 포트를 유연하게 사용할 수 있도록 설계하였다. 이와 같이 설계된 다채널 비동기 통신 IC를 ALTERA사의 Cyclone Ⅱ Series EP2C35F672C8과 QuartusⅡ V8.1을 이용하여 로직을 합성 및 시뮬레이션 하였다. QuartusⅡ 시뮬레이션과 실험에서 성공적으로 수행되었으며, 설계된 IC의 우수성을 보이기 위해 비동기 통신 칩으로 많이 사용되고 있는 TI(Texas Instruments)사의 TL16C550A, ATMEL사의 ATmega128 범용 마이크로 콘트롤러와 수행시간 및 성능을 비교하여 본 논문에서 설계된 다채널 비동기 통신용 IC의 우수함을 확인하였다. In this paper, the IC (Integrated Circuit) for multi-channel asynchronous communication was designed by using FPGA and VHDL language. The existing chips for asynchronous communication that has been used commercially are composed of one to two channels. Therefore, when communication system with two channels or more is made, the cost becomes high and it becomes complicated for communication system to be realized and also has very little buffer, load that is placed into Microprocessor increases heavily in case of high speed communication or transmission of high-capacity data. The designed IC was improved the function and performance of communication system and reduced costs by designing 8 asynchronous communication channels with only one IC, and it has the size of transmitter/receiver buffer with 256 bytes respectively and consequently high speed communication became possible. To detect errors between communications, it was designed with digital filter and check-sum logic and channel MUX logic so that the malfunction can be prevented and errors can be detected more easily and input/output port regarding each communication channel can be used flexibly and consequently the reliability of system was improved. It was composed and simulated logic of VHDL described by using Cyclone Ⅱ Series EP2C35F672C8 and QuartusⅡ V8.1 of ALTERA company. In order to show the performance of designed IC, the test was conducted successfully in QuartusⅡ simulation and experiment and the excellency was compared with TL16C550A of TI (Texas Instrument) company and ATmegal28 general-purpose micro controller of ATMEL company that are used widely as chips for asynchronous communication.