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MIL-STD-1553B 통신에서 샘플링 기반 최적화 기법을 이용한 효율적 임무 자료 전송
이헌철,김기표,권용성,Lee, Heoncheol,Kim, Kipyo,Kwon, Yongsung 한국군사과학기술학회 2018 한국군사과학기술학회지 Vol.21 No.3
The mission data in missile systems should be quickly and reliably transmitted from a mission transmission device to a guidance control unit. The MIL-STD-1553B is one of the reliable communication standards, but its bit rate is generally limited to 1Mbps due to the intrinsic properties of its electrical design. Therefore, the bus controller needs to be optimized to efficiently transmit the mission data on the inevitably limited bit rate. This paper proposes an analytical approach based on sampling-based optimization methods to maximize the data throughput without data loss. The proposed approach was evaluated in the simulations with the data transmission model for the MIL-STD-1553B communication system. The results of the proposed methods were applied to a real-time system and showed that the proposed method was successfully performed.
완성 유도탄 탑재장비의 소프트웨어 업그레이드를 위한 MIL-STD-1553B 기반 간접적 데이터 전송 기술
김기표,유해성,이헌철,윤석재,안기현,우덕영,Kim, Kipyo,Yu, Haesung,Lee, Heoncheol,Yun, Seokjae,Ahn, Keehyun,Woo, Deogyoung 한국군사과학기술학회 2016 한국군사과학기술학회지 Vol.19 No.1
This paper addresses the problem of the software update or upgrade of embedded equipments on a missile assembly with booster. Because the embedded equipments are assembled delicately and closely one another with various communication and power cables, they should be very carefully disassembled to directly upgrade the software of a certain embedded equipment. This may cause not only the costs for disassembly and reassembly but also additional tests to verify the completeness of the reassembled missile as a missile assembly with booster. This paper presents an indirect data transfer technique based on MIL-STD-1553B through Guidance Control Unit to easily upgrade the software of other equipments without any additional costs caused by disassembly and reassembly. The presented technique was successfully applied to the software upgrade of various equipments on real missile assembly with booster.
동적 저궤도 위성 네트워크를 위한 Dueling DQN 기반 라우팅 기법
김도형,이상현,이헌철,원동식,Dohyung Kim,Sanghyeon Lee,Heoncheol Lee,Dongshik Won 대한임베디드공학회 2023 대한임베디드공학회논문지 Vol.18 No.4
This paper deals with a routing algorithm which can find the best communication route to a desired point considering disconnected links in the LEO (low earth orbit) satellite networks. If the LEO satellite networks are dynamic, the number and distribution of the disconnected links are varying, which makes the routing problem challenging. To solve the problem, in this paper, we propose a routing method based on Dueling DQN which is one of the reinforcement learning algorithms. The proposed method was successfully conducted and verified by showing improved performance by reducing convergence times and converging more stably compared to other existing reinforcement learning-based routing algorithms.