• Title, Summary, Keyword: ground control system

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DEVELOPMENT OF THE KOMPSAT-2 SATELLITE MISSION CONTROL SYSTEM

  • Lee Byoung-Sun;Lee Sanguk;Mo Hee-Sook;Cho Sungki;Jung Won Chan;Kim Myungja;Kim In-Jun;Kim Tae-Hee;Joo Inone;Hwang Yoola;Kim Jaehoon
    • Bulletin of the Korean Space Science Society
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    • pp.300-303
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    • 2004
  • KOMPSAT-2 satellite mission operations and control system has been developed by ETRI. The system functional architecture, analysis and design, implementation, and tests are presented in this paper.

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CONCEPTUAL DESIGN OF MONITORING AND CONTROL SUBSYSTEM FOR GNSS GROUND STATION

  • Jeong, Seong-Kyun;Kim, In-Jun;Lee, Jae-Eun;Lee, Sang-Uk;Kim, Jae-Hoon
    • Journal of Astronomy and Space Sciences
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    • v.24 no.4
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    • pp.389-396
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    • 2007
  • The Global Navigation Satellite System (GNSS) becomes more important and is applied to various systems. Recently, the Galileo navigation system is being developed in Europe. Also, other countries like China, Japan and India are developing the global/regional navigation satellite system. As various global/regional navigation satellite systems are used, the navigation ground system gets more important for using the navigation system reasonably and efficiently. According to this trend, the technology of GNSS Ground Station (GGS) is developing in many fields. The one of purposes for this study is to develop the high precision receiver for GNSS sensor station and to provide ground infrastructure for better performance services on navigation system. In this study, we consider the configuration of GNSS Ground Station and analyze function of Monitoring and Control subsystem which is a part of GNSS Ground Station. We propose Monitoring and Control subsystem which contains the navigation software for GNSS Ground System to monitor and control equipments in GNSS Ground Station, to spread the applied field of navigation system, and to provide improved navigation information to user.

Development of Operation Network System and Processor in the Loop Simulation for Swarm Flight of Small UAVs (소형 무인기들의 군집비행을 위한 운영 네트워크 시스템과 PILS 개발)

  • Kim, Sung-Hwan;Cho, Sang-Ook;Cho, Seong-Beom;Park, Choon-Bae
    • Journal of Institute of Control, Robotics and Systems
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    • v.18 no.5
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    • pp.433-438
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    • 2012
  • In this paper, a operation network system equipped with onboard wireless communication systems and ground-based mission control systems is proposed for swarm flight of small UAVs. This operating system can be divided into two networks, UAV communication network and ground control system. The UAV communication network is intend to exchange the informations of navigation, mission and flight status with minimum time delay. The ground control system consisted of mission control systems and UDP network. Proposed operation network system can make a swarm flight of various UAVs, execute complex missions decentralizing mission to several UAVs and cooperte several missions. Finally, PILS environments are developed based on the total operating system.

The development of ground and airborne control system for remotely piloted vehicle (무인항공기의 지상 및 기상 제어 시스템 개발)

  • 김영철;이윤생;김승주
    • 제어로봇시스템학회:학술대회논문집
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    • pp.361-366
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    • 1991
  • A ground and airborne control system for remotely piloted vehicle (RPV) is described. 1) Ground control system 2) airborne control system 3) the method of measuring aircraft attitude and heading 4) autopilot 5) the method of treating emergency status 6) the method of transmitting and receiving communication data 7) the method of displaying aircraft status 8) the characteristics of the aircraft control system are discussed in some detail.

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An Experimental Study on Variable-Speed Control of an Ground-Water Circulation Pump for a Ground Source Multi-Heat Pump System (주거용 건물 지열원 멀티 히트펌프시스템의 지열순환펌프 가변유량제어에 관한 실증연구)

  • Song, Suwon
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.25 no.8
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    • pp.443-449
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    • 2013
  • The purpose of this study is to propose an enhanced variable-speed control method of ground-water circulation pumps using inlet and outlet ground-water temperature difference and analyze its effect for the ground source multi-heat pump system installed in a single-family house. As a result, it has shown to significantly reduce the electricity use of ground-water circulation pump and improve overall system Coefficient of Performance (COP) due to the proposed variable-speed control under partial load conditions after oversized and inefficient single-speed pump retrofit.

Extraction of Ground Control Point (GCP) from SAR Image

  • Hong, S.H.;Lee, S.K.;Won, J.S.;Jung, H.S.
    • Proceedings of the KSRS Conference
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    • pp.1058-1060
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    • 2003
  • A ground control point (GCP) is a point on the surface of Earth where image coord inates and map coordinates can be identified. The GCP is useful for the geometric correction of systematic and unsystematic errors usually contained in a remotely sensed data. Especially in case of synthetic aperture radar (SAR) data, it has serious geometric distortions caused by inherent side looking geometry. In addition, SAR images are usually severely corrupted by speckle noises so that it is difficult to identify ground control points. We developed a ground point extraction algorithm that has an improved capability. An application of radargrammetry to Daejon area in Korea was studied to acquire the geometric information. For the ground control point extraction algorithm, an ERS SAR data with precise Delft orbit information and rough digital elevation model (DEM) were used. We analyze the accuracy of the results from our algorithm by using digital map and GPS survey data.

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Performance Analysis of Navigation Algorithm for GNSS Ground Station

  • Jeong, Seong-Kyun;Park, Han-Earl;Lee, Jae-Eun;Lee, Sang-Uk;Kim, Jae-Hoon
    • Journal of Satellite, Information and Communications
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    • v.3 no.2
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    • pp.32-37
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    • 2008
  • Global Navigation Satellite System (GNSS) is been developing in many countries. The satellite navigation system has the importance in economic and military fields. For utilizing satellite navigation system properly, the technology of GNSS Ground Station is needed. GNSS Ground Station monitors the signal of navigation satellite and analyzes navigation solution. This study deals with the navigation software for GNSS Ground Station. This paper will introduce the navigation solution algorithm for GNSS Ground Station. The navigation solution can be calculated by the code-carrier smoothing method, the Kalman-filter method, the least-square method, and the weight least square method. The performance of each navigation algorithm in this paper is presented.

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Ground Test of the Flight Control System Using PC104 (PC104를 이용한 비행제어 시스템 개발을 위한 지상시험)

  • Heo, Chi-Hoon;Roh, Min-Shik;Cho, Kyeum-Rae;Lee, Dae-Woo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.35 no.5
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    • pp.452-459
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    • 2007
  • This paper presents the flight control system using a PC104 with GPS and IMU. This System includes an Auto/Manual conversion module by PIC16 for safety, and homing type guidance algorithm to flight toward a scheduled target. We verify the performance of the flight control system via ground test, and present the possibility of application into UAV control system via comparison with the commercial system.

Ground Test and Evaluation of a Flight Control Systemfor Unmanned Aerial Vehicles

  • Suk, Jin-Young
    • International Journal of Aeronautical and Space Sciences
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    • v.5 no.1
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    • pp.57-63
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    • 2004
  • UAV(Unmanned Aerial Vehicle) has become one of the most popularmilitary/commercial aerial robots in the new millennium. In spite of all theadvantages that UAVs inherently have, it is not an easv job to develop a UAVbecause it requires very systematic and complete approaches in full developmentenvelop. The ground test and evaluation phase has the utmost importance in thesense that a well-developed system can be best verified on the ground. In addition,many of the aircraft crashes in the flight tests were resulted from the incompletedevelopment procedure. In this research, a verification procedure of the wholeairbome integrated system was conducted including the flight management system.An airbome flight control computer(FCC) senses the extemal environment from thepehpheral devices and sends the control signal to the actuating system using theassigned control logic and flight test strategy. A ground test station controls themission during the test while the downlink data are transferred from the flightmanagement computer using the serial communication interface. The pilot controlbox also applies additional manual actuating commands. The whole system wastested/verified on the wind-tunnel system, which gave a good pitch controlperformance with a preUspecified flight test procedure. The ground test systemguarantees the performance of fundamental functions of airbome electronic systemfor the future flight tests.