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무인 자율 주행 지게차를 위한 네트워크 기반 분산 제어 시스템의 구조
이주경(Jukyung Lee),이상협(Sanghyob Lee),이경창(Kyungchang Lee),이석(Suk Lee) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
To enhance the productivity of material handling system in an automated warehouse, an unmanned autonomous forklift will necessitate more elementary functions and systemic integration. However, it is very difficult tasks to integrate various functions for autonomous driving and fork handling. That is because a wiring will rapidly increase when electronic devices such as sensors, actuators, and controllers are increased and the computing capacity of processors will rapidly increase when additional functions are implemented. To reduce these problems, this paper presents an unmanned autonomous forklift with the network-based distributed control system scheme. In the network-based distributed control system scheme, one or two functions are implemented at one microcontroller with a restricted computing capacity and modules are connected with CAN network.
샤시 네트워크 시스템을 위한 FlexRay 스케줄링 알고리즘
이종갑(JongGap Lee),이경창(Kyungchang Lee),이석(Suk Lee) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
In the future, an intelligent car requires high level applications such as fault tolerance and high data rate. Existing CAN which is the most popular In-Vehicle Network protocol until now cannot support these applications. So FlexRay appeared for complement to CAN. FlexRay is time-triggered protocol and I has deterministic characteristics. But scheduling algorithm for support FlexRay is very complicated and there is no standard scheduling algorithm. In this paper, therefore, we propose two FlexRay scheduling algorithm using CAN database. One is called 'Message-based scheduling algorithm', another is 'Communication node-based scheduling algorithm'. 'Message-based scheduling algorithm' use messages, ' Communication node-based scheduling algorithm' use communication nodes in a cluster for scheduling. This paper suggests these two scheduling algorithm going one step forward valuates them.
라즈베리파이를 활용한 IoT 환경에서 다중 인증 시스템 구현
이성목(Seongmok Lee),정경창(Kyungchang Jung),오홍석(Hongseok Oh),이의종(Euijong Lee) 한국정보기술학회 2021 Proceedings of KIIT Conference Vol.2021 No.11
다중 인증 시스템은 사용자 인증 시 두 개 이상의 인증 수단을 사용하도록 하여 보안성을 높인 인증방식이다. 본 논문은 사용자 인증 시 최소 두 개 이상의 생체 인증을 사용하도록 하여 보안성을 높였다. 또한 각 인증방식 별로 보안 수준에 따라 점수를 부여하였으며, 특정 점수 이상이 되어야 인증이 가능하도록 하였다. 본 논문은 홍채인식, 지문인식, 얼굴인식, RFID, QR-code, 패스워드의 기능을 라즈베리파이를 통해 구현하고 IoT 환경에서 동작하도록 하는 것을 목표로 하였다.
샤시 네트워크 시스템을 위한 FlexRay 스케줄링 알고리즘
이주경(Jukyung Lee),이종갑(JongGap Lee),이경창(Kyungchang Lee) 제어로봇시스템학회 2009 제어로봇시스템학회 합동학술대회 논문집 Vol.2009 No.12
In the future, an intelligent car requires high level applications such as fault tolerance and high data rate. Existing CAN which is the most popular In-Vehicle Network protocol until now cannot support these applications So FlexRay appeared for complement to CAN. FlexRay is time-triggered protocol and I has deterministic characteristics. But scheduling algorithm for support FlexRay is very complicated and there is no standard scheduling algorithm. In this paper, therefore, we propose two FlexRay scheduling algorithm using CAN database. One is called ‘Message-based scheduling algorithm’, another is ‘Communication node-based scheduling algorithm’. ‘Message-based scheduling algorithm’ use messages, ‘Communication node-based scheduling algorithm’ use communication nodes in a cluster for scheduling. This paper suggests these two scheduling algorithm going one stop forward valuates them.
Dual CAN 시스템을 위한 Kalman 기반 Traffic balancing 알고리즘 개발
이종갑(JongGap Lee),이석(Suk Lee),이경창(Kyungchang Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The controller area network (CAN) is the dominant protocol for in-vehicle networking systems because it provides bounded transmission delay among electronic control units (ECUs) at data rates between 12Kbps and 1Mbps. And, many automotive companies have chosen the CAN protocol for their chassis network system of intelligent vehicles. However, the increasing number of ECUs in the intelligent vehicle and the need for more intelligent functions require a network system with more network capacity and real-time capability. As one approach to enhance the network capacity of a CAN system, this paper introduces a CAN system with dual communication channels. And, this paper presents Kalman based traffic-balancing algorithm that predicts the traffic of each channel using Kalman filter and allocates frames to the more appropriate channel. An experimental test bed using commercial off-the-shelf microcontroller with two CAN controllers was used to demonstrate the feasibility of the Kalman based traffic-balancing algorithm.
트리 구조로 구현한 수도권 전철 다중 경로 탐색 알고리즘
이성목(SeongMok Lee),정경창(KyungChang Jeong),오홍석(HongSeok OH),정재민(JaeMin Jeong),이의종(Euijong Lee) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.6
그래프 기반 경로 검색 알고리즘은 실제 세계에서 정류장이나 노선이 추가되면 그래프의 노드 및 링크 정보를 업데이트해야 하는 번거로움이 있었다. 본 논문에서는 이러한 변화에 신속하게 대처하기 위해 정류장 간 연결 정보와 운행 시간표 데이터를 이용한 트리 구조 다중 경로 검색 모델을 제안한다.