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GNSS/INS 통합항법 시스템을 위한 범용 PC와 Off-The-Shelf 인터페이스 보드를 이용한 시뮬레이터 설계
손재훈,오상헌,황동환 사단법인 항법시스템학회 2024 Journal of Positioning, Navigation, and Timing Vol.13 No.1
Global Navigation Satellite System (GNSS)/Inertial Navigation System (INS) integrated navigation systems provide highly accurate and reliable navigation solutions and are widely used as civil and military navigation systems. In order to facilitate the GNSS/INS integrated navigation system development task, a simulator can be used to provide inputs for the GNSS/INS integrated navigation system. In this paper, a simulator design using general-purpose Personal Computer (PC) and Off-The-Shelf (OTS) interface boards for a GNSS/INS integrated navigation system is proposed and implementation results are presented. Requirements of the GNSS/INS integrated navigation system simulator are presented and a design method that satisfies the requirements is described. In order to show the usefulness of the proposed design method, a simulator using a general-purpose PC and OTS interface boards for the GPS/INS integrated navigation system are implemented and verified. The implementation results show that the simulator designed by the proposed method generates the GPS L1 C/A signal and IMU data without any problems.
다중 통합항법 시스템을 위한 랩뷰 기반의 사용자 인터페이스 설계
손재훈,정준우,오상헌,박준민,황동환 사단법인 항법시스템학회 2024 Journal of Positioning, Navigation, and Timing Vol.13 No.1
In order to reduce the time and cost of developing a navigation system, a performance evaluation platform can be used. A User Interface (UI) is required to effectively evaluate the performance, which sets parameters and gives navigation sensor signals and data display, and also displays navigation results. In this paper, a LabVIEW-based UI design method for multi-integrated navigation systems is proposed and implementation results are presented. The UI consists of a signal and data generation part and a signal and data processing part. The signal and data generation part sets parameters for the signal and data generation and displays the navigation sensor signal and data generation results. The signal and data processing part sets parameters for the signal and data processing and displays the navigation results. The signal and data generation part and signal and data processing part are designed to satisfy the requirements of the UI for a performance evaluation of the navigation system. In order to show the usefulness of the proposed UI design method, parameters of the signal and data generation and the signal and data processing are set through the LabVIEW-based UI, and the Global Positioning System (GPS) signal and inertial measurement unit data generation results and the navigation results of a GPS Software Defined Receiver (SDR) and inertial navigation system are confirmed. The implementation results show that the proposed UI design method helps users conduct an effective performance evaluation of navigation systems.
손재훈,신윤섭,김진영,우한영 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Perovskite has attracted attention in the LED field due to its excellent optical properties such as fine color purity and high photoluminescence quantum yield. However, blue PeLED has a lower device efficiency than red and green PeLED. Since blue PeLED generally exhibits a wide energy band gap and a deep HOMO energy level, it is essential to develop an electron transport material having an appropriate energy level to improve device performance. In this study, new electron transport materials, TPBi-A, TPBi-B, and TPBi-C, were developed by introducing an electron-withdrawing group to 2,2",2""-(1,3,5-Benzinetriyl)-Tris(1-phenyl-1-H-benzimidazole), TPBi, which is widely used as an electron transport layer due to its superior electron transport properties. In addition, we intend to investigate the correlation between the changes in the performance of the PeLED device by the introduction of the electron pulling group and the changes in the electrochemical and morphological characteristics.
운동 분류기를 이용한 지상 항체의 상황 적응 관성 항법 시스템 설계
손재훈,김효석,오상헌,황동환 제어·로봇·시스템학회 2020 제어·로봇·시스템학회 논문지 Vol.26 No.8
A context-adaptive inertial navigation system for ground vehicles using a motion classifier is proposed. The proposed navigation system consists of an inertial measurement unit, strap-down inertial navigation system algorithm, motion classifier, pseudo-measurement generator, and Kalman filter. The motion types selected for the ground vehicle motion classifier are stationary state, straight motion, constant roll motion, and constant pitch motion. Test statistics of the motion classifier using outputs from the inertial measurement unit were derived for the motion types. A method to determine thresholds for the motion classifier from reference navigation results is presented. In order to validate the proposed navigation system, two van tests were performed for a commercial micro-electro mechanical system (MEMS) inertial measurement unit. The van test results show that better performance can be achieved when the motion classifier uses all of the motion types. .