• Title/Summary/Keyword: Command Guidance

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Implementation of Airborne Multi-Function Radar Including Attitude Maneuvering (자세 기동을 고려한 항공기 탑재 다기능 레이다 통합 시뮬레이터 구현)

  • Ko, Jae-Youl;Park, Soon-Seo;Choi, Han-Lim;Ahn, Jae-Myung;Lee, Sung-Won;Lee, Dong-Hui;Yoon, Jung-Suk
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.28 no.3
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    • pp.225-236
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    • 2017
  • In this paper, a simulation test bed is presented which operates to provide full-scale simulation of airborne multi-function phased array radars. This simulation test bed provides a capability to evaluate the target tracking performance. To realize aircraft operation scenario, we developed 6DOF aircraft dynamics model which can generate trajectories and attitude of an aircraft. This procedure includes steady state flight trim search, autopilot design, and aircraft guidance command design. Also, the radar-environment integrated simulator includes target detection/measurement model and tracking filter. Developed simulator is validated by creating an air-to-air scenario.

A Study on the Quadcopters Formation Flight Guidance Law Design in Wireless Sensor Network (무선 센서 네트워크를 통한 쿼드콥터들의 편대 비행 기법 설계에 관한 연구)

  • Kim, Eui-hwan;Lee, Hak-soo;Ji, Seong-in;Oh, Young-jun;Lee, Kang-hwan
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2015.05a
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    • pp.101-104
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    • 2015
  • In this paper, a flight techniques many quadcopters which can be configured flexibly squadron according to the situation in wireless sensor networks is suggested. In previous studies, aircrafts fly only as part of a prescribed form and know the distance between the aircraft by sensor was able to maintain the fleet. Also, the problem occurs that between the aircraft distance is not constant. In this paper, proposes an algorithm that the context of the formation fly using the current position of the quadcopter through a virtual map is based on the relative coordinates without being affected by Indoor, outdoor and obstacles. Proposed algorithm is Leader-Follower Technique that the method of determinin the shape of the squadron to the down command to the sub-quadcopter using the wireless network by the main quadcopter to determine a given situation. As simulation result, the proposed algorithm was confirmed that formation flight efficient in sensing the all conditions as compared to the conventional method.

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Range Estimation Algorithm Based on Triangulation Using Angle Measurements (각도 측정치를 이용한 삼각 측량법 기반 거리 추정 알고리즘)

  • Kang, Tae Young;Moon, Kyujin;Lee, Yong-Seon;Choi, Sung-Ho;Ryoo, Chang-Kyung
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.48 no.4
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    • pp.277-284
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    • 2020
  • The remaining range between missile and target can be used to calculate the guidance command as well as to determine the explosion time of the warhead. Since the range, however, is not directly measured by on-board sensors of the missile, it is usually estimated by filter-based techniques using angle-only measurements. Conventional filter-based techniques are complex and require huge computation. In this paper, we propose a range estimation algorithm based on the geometrical triangulation principle for two points of missiles and a target. The proposed algorithm has a simple structure but the accuracy is largely dependent on the measurement errors. To improve the accuracy of estimation, Digital Fading Memory Filter (DFMF) is applied. The performance of the proposed algorithm is analyzed through numerical simulations.

Mission Management Technique for Multi-sensor-based AUV Docking

  • Kang, Hyungjoo;Cho, Gun Rae;Kim, Min-Gyu;Lee, Mun-Jik;Li, Ji-Hong;Kim, Ho Sung;Lee, Hansol;Lee, Gwonsoo
    • Journal of Ocean Engineering and Technology
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    • v.36 no.3
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    • pp.181-193
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    • 2022
  • This study presents a mission management technique that is a key component of underwater docking system used to expand the operating range of autonomous underwater vehicle (AUV). We analyzed the docking scenario and AUV operating environment, defining the feasible initial area (FIA) level, event level, and global path (GP) command to improve the rate of docking success and AUV safety. Non-holonomic constraints, mounted sensor characteristic, AUV and mission state, and AUV behavior were considered. Using AUV and docking station, we conducted experiments on land and at sea. The first test was conducted on land to prevent loss and damage of the AUV and verify stability and interconnection with other algorithms; it performed well in normal and abnormal situations. Subsequently, we attempted to dock under the sea and verified its performance; it also worked well in a sea environment. In this study, we presented the mission management technique and showed its performance. We demonstrated AUV docking with this algorithm and verified that the rate of docking success was higher compared to those obtained in other studies.