• Title/Summary/Keyword: Unmanned Systems

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A Study on Fault History Management Equipment of Unmanned Aerial Systems (무인항공기 체계의 고장이력관리장비에 관한 연구)

  • Soh, Nahyun
    • Journal of Aerospace System Engineering
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    • v.13 no.3
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    • pp.48-55
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    • 2019
  • This paper presents a study on Fault History Management Equipment (FHME) of Unmanned Aerial Systems (UAS). UAS comprise of various types of electronic equipment for high reliability design for flight safety. Consequently, it is mandatory for each on-board equipment to have its own Built-In-Test (BIT) function, because rapid fault-detections for UAS are necessary. FHME is developed for the purposes of display, storage and management of such BIT results on ground. This paper describes the outline, development requirements, design and verification process of FHME.

Development of Muscle-Strength-Assistant Device and Military Suitability for High-Weight Carrying (고중량물 운반을 위한 근력보조장치 개발 및 군 적합성 연구)

  • Kim, Hyeong-Rae;Park, Jang-Sik;Lee, Kyeong-Ha;Ryu, Jae-Kwan
    • The Journal of Korea Robotics Society
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    • v.17 no.2
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    • pp.191-197
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    • 2022
  • In this research, we developed the muscle-strength-assistant device, named as LEXO-W, and conducted suitability test for army when transporting high weights. LEXO-W relieves the burden when carrying heavy weights by distributing the load concentrated on the arms throughout the body. LEXO-W weighs 4 kg and is designed to handle objects weighing up to 55 kg. To verify the effectiveness of the device, object handling tests (high explosive shell, simple assembly bridges, and ammunition boxes) were conducted. Working time, metabolic rate, and electromyogram (EMG) signals were measured in each test. As a result, it was confirmed that the working time, metabolic rate and EMG signal before and after wearing LEXO-W were decreased. This research has great significance in that it verified the performance of the wearable device from the perspective of military operation.

A Study on the Site Selection of Unmanned Post Office Considering the Operation Cost by the Mail Volume (우편물량 규모에 따른 운영비용 기준의 무인화 대상우체국 선정에 관한 연구)

  • Choi, Jiyoung;Lee, Jeong-hun
    • Korean Management Science Review
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    • v.33 no.3
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    • pp.1-18
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    • 2016
  • Recently, ordinary mail is decreasing continuously by the development of ICT (Information and Communications Technology) including E-mail, messenger service, and etc. On the contrary, parcel post is increasing by the increase of online shopping, home shopping, and etc. Aside from these changes, the demand for various mail acceptance and delivery means is increasing with the increase of single households and dual-income couples. To overcome these environmental changes, Korea Post installs unmanned post offices which are composed of various unmanned mail acceptance and delivery postal systems. In this paper, we propose the methodological approach for the site selection of unmanned post office among the existing post offices and the installation standard of unmanned postal system considering the operation cost by the mail volume.

Adaptive Fuzzy Controller Design for Altitude Control of an Unmanned Helicopter

  • Kim, Jong-Kwon;Park, Soo-Hong;Cho, Kyeum-Rae;Jang, Cheol-Soon
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.590-593
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    • 2005
  • Unmanned Helicopter has several abilities such as vertical Take off, hovering, low speed flight at low altitude. Such vehicles are becoming popular in actual applications such as search and rescue, aerial reconnaissance and surveillance. These vehicles also used under risky environments without threatening the life of a pilot. Since a small unmanned helicopter is very sensitive to environmental conditions, it is generally known that the flight control is very difficult problems. The nonlinear adaptive fuzzy controller design procedure and its applications for altitude control of unmanned helicopter were described in the paper. This research was concentrated on describing the design methodologies of altitude controller design for small unmanned helicopter acquiring autonomous take off and vertical movement. The design methodologies and performance of the altitude controller were simulated and verified with an adaptive fuzzy controller. Throughout simulation results, I showed that the proposed adaptive controllers have enhanced control performance such as robustness, effectiveness and safety, in the altitude control of the unmanned helicopter.

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THE BASIC DESIGN AND ANALYSIS OF UNMANNED VEHICLE FOR TH TELE-OPERATION CONTROL (원격주행을 위한 무인 자동차에 관한 기본설계와 성능분석에 관한 연구)

  • 심재흥;윤득선;김민석;김정하
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.139-139
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    • 2000
  • The subject of this paper is the tole operation for unmanned vehicle. The aim is studied in context of motor control system and algorithms for the mid to low level control of tele operation unmanned vehicle described. Modern, vehicle related researches have been implemented about control, chassis, body and safe쇼 but now is to driving comfort, I.T.S. and human factor, etc. As a result of this fact, unmanned vehicle is main research topic over the world but it is still very expensive and unreasonable. A hierarchical approach is studied in context of motor control system and algorithms for the mid to low level control of tele operation unmanned vehicle described. The real time control and monitoring of longitudinal, lateral, Pitching motion is to be solved by system integration and optimization technique. We show the experimental result about fixed brake range test and acceleration test. And all system is to integrated for driving simulator and unmanned vehicle.

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Spatial database architecture for organizing a unified information space for manned and unmanned aviation

  • Maksim Kalyagin;Yuri Bukharev
    • Advances in aircraft and spacecraft science
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    • v.10 no.6
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    • pp.545-554
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    • 2023
  • The widespread introduction of unmanned aircrafts has led to the understanding of the need to organize a common information space for manned and unmanned aircrafts, which is reflected in the Russian Unmanned aircraft system Traffic Management (RUTM) project. The present article deals with the issues of spatial information database (DB) organization, which is the core of RUTM and provides storage of various data types (spatial, aeronautical, topographical, meteorological, vector, etc.) required for flight safety management. Based on the analysis of functional capabilities and types of work which it needs to ensure, the architecture of spatial information DB, including the base of source information, base of display settings, base of vector objects, base of tile packages and also a number of special software packages was proposed. The issues of organization of these DB, types and formats of data and ways of their display are considered in detail. Based on the analysis it was concluded that the optimal construction of the spatial DB for RUTM system requires a combination of different model variants and ways of organizing data structures.

H$\infty$ Steering Control of an Unmanned Vehicle Driving System by the MR sensors (MR 센서를 이용한 무인 자동 시스템의 H$\infty$ 조향 제어)

  • 박기선;김창섭;이영진;윤강섭;배종일;이만형
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.6-6
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    • 2000
  • By using the information obtained from the outputs of MR(MagnetoResistive) sensors for an Unmanned Vehicle Driving System, we develop an algorithm that decides the distance and direction between vehicle and the guideline which is made by the magnet. To improve the robust tracking properties of the closed loop system, we introduce H$\infty$ controller and its application for the Unmanned Vehicle Driving System.

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A Comparative Study on Assessment of Speed Enforcement by Unmanned Camera and Policeman (기계적 단속 및 인력단속에 의한 과속단속 효과 분석)

  • Gang, Su-Cheol;Kim, Man-Bae;Gang, Dong-Geun;Jang, Sun-Hui
    • Journal of Korean Society of Transportation
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    • v.28 no.6
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    • pp.17-24
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    • 2010
  • As various social problems occur due to increasing traffic accidents, the government has setup and executed strong safety policies. As a result, the number of traffic accidents and the death toll have been decreasing in recent years. However, the setup and execution of the various policies for reducing traffic accidents cost much, so it is necessary to evaluate the cost-effectiveness of each policy. In the present study, enforcement by means of an unmanned over-speed enforcement system, the enforcement effect of which was proven good compared to the cost required for traffic enforcement, is compared with enforcement by policemen. As a result of the comparison, the average speed was 82.66 km/h before the use of unmanned systems and policemen; the average speed with manned enforcement was 70.57 km/h; and the average speed with unmanned systems was 67.85 km/h. The speed limit violation rate was 65% before the use of unmanned systems and policemen; 32% with manned enforcement; and 15% with unmanned systems. Considering the kinds of vehicles, the average speed and violation rate were highest among private cars, then vans, and then trucks.. Considering lanes. The accident rate was estimated based on the above results, and the input cost-to-advantage was estimated. The annual cost-to-advantage was estimated by comparing the above estimated values with the conditions before the unmanned over-speed enforcement system. Subsequently, the enforcement by policemen showed a negative advantage of 76,130,590 won, and the enforcement by the unmanned system showed a positive advantage of 38,577,670 won.

Development of Automatic flight Control System for Low Cost Unmanned Aerial Vehicle (저가형 무인 항공기의 자동비행시스템 개발)

  • Yoo, Hyuk;Lee, Jang-Ho;Kim, Jae-Eun;An, Yi-Ki
    • Journal of Institute of Control, Robotics and Systems
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    • v.10 no.2
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    • pp.131-138
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    • 2004
  • Automatic flight control system (AFCS) for a low-cost unmanned aerial vehicle is described in this paper. Development process and block diagram of the AFCS are introduced. The flight control law for longitudinal and lateral channel autopilot is designed using optimization process. In this procedure, the performance index is composed of desired location of closed loop system poles and H$_2$norm of the resultant flight control system. This procedure is applied to the autopilot design of an unmanned target vehicle. Performance of the AFCS is evaluated by processor-in-the-loop simulation test and flight test. These results show that the AFCS has acceptable performance fur low cost UAV.

Unmanned Forklift Docking Using Two Cameras (상하 카메라를 이용한 무인 지게차의 도킹)

  • Yi, Sang-Jin;Song, Jae-Bok
    • Journal of Institute of Control, Robotics and Systems
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    • v.21 no.10
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    • pp.930-935
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    • 2015
  • An unmanned forklift requires precise positioning and pallet detection. Therefore, conventional unmanned forklifts use high-cost sensors to find the exact position of the pallet. In this study, a docking algorithm with two cameras is proposed. The proposed method uses vision data to extract the angle difference between the pallet and the forklift. Then the control law is derived from the extracted angle for successful docking. The extracted angle is compared with the actual angle in the real environment. The control law is tested with the Lyapunov stability test and Routh-Hurwitz stability criterion. Through various experiments, the proposed docking algorithm showed the success rate high enough for real-life applications.