• Title/Summary/Keyword: unmanned system

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Collision Avoidance Algorithm and System Development for Unmanned Driving Safety of All Terrain Vehicle (무인 운항 시스템의 주행안전을 위한 충돌회피 시스템과 알고리즘 개발)

  • Yun, Duk-Sun;Lim, Ha-Young;Yu, Hwan-Sin;Kim, Jung-Ha
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.33 no.10
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    • pp.104-110
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    • 2005
  • In this paper, unmanned vehicle system and VFF algorithm development with vehicle dynamics is the main topic as a part of Intelligent Transportation System. Unmanned vehicle system is classified by vehicle system and control system. Authors used RC servo motor for longitudinal control via throttle angle, shift lever control, and brake control. For lateral control, authors used step motor, equipped with reduction gear. Unmanned vehicle has nine ultrasonic sensors in front of the unmanned vehicle. After the microcontroller computes the distance between unmanned vehicle and obstacle, the control computer calculates the steering angle enough to avoid the obstacle.

Disign of Unmanned Vehicle Control System with LoRa Network (LoRa망을 활용한 무인이동체 관제 시스템 설계)

  • Lee, Jae-Ung;Jang, Jong-Wook
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2018.10a
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    • pp.44-46
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    • 2018
  • In this paper, we design a system that can control unmanned mobile objects through communication between unmanned mobile object and control server system using LoRa network which is a dedicated IoT network. It is more efficient when the unmanned mobile object performs the special work by installing the LoRa network applied to the unmanned mobile object control system from the small space house or office hospital to the factory. In this paper, we will discuss the design of a system that can improve the social utilization of unmanned mobile objects by making it possible to communicate the events that occur around other mobile objects from the simplification of the navigation path.

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A Method of System Effectiveness Analysis for Remote-Operated Unmanned Ground Vehicles Using OneSAF (OneSAF를 이용한 원격조종 지상무인차량 체계효과분석 방법)

  • Han, Sang Woo;Pyun, Jai Jeong;Cho, Hyunsik
    • Journal of Korean Institute of Industrial Engineers
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    • v.40 no.4
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    • pp.388-395
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    • 2014
  • Nowadays unmanned ground systems are used in supporting of surveillance and explosive ordnance disposal. Also, we expect that will be used to remarkably enhance combat capability through network-based cooperative operations with other combat systems. In order to effectively develop those unmanned systems, we needs a systematic method to analyze combat effectiveness and validate required operation capabilities. In this paper, we propose a practical approach to simulate remote-operated unmanned ground systems by using OneSAF, an US-Army simulation framework. First of all, we design a simulation model of unmanned system by integrating with core components for wireless communications and remote control of mobility and fire. Next, we extend OneSAF functionality to create communication links that connects a remote controller with an unmanned vehicle and define a simulated behavior to operate unmanned vehicles via the communication links. Finally, we demonstrate the feasibility of the proposed model within OneSAF and summarize system effectiveness analysis results.

Study on Unmanned Hybrid Unmanned Surface Vehicle and Unmanned Underwater Vehicle System

  • Jin, Han-Sol;Cho, Hyunjoon;Lee, Ji-Hyeong;Jiafeng, Huang;Kim, Myung-Jun;Oh, Ji-Youn;Choi, Hyeung-Sik
    • Journal of Ocean Engineering and Technology
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    • v.34 no.6
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    • pp.475-480
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    • 2020
  • Underwater operating platforms face difficulties regarding power supply and communications. To overcome these difficulties, this study proposes a hybrid surface and underwater vehicle (HSUV) and presents the development of the platform, control algorithms, and results of field tests. The HSUV is capable of supplying reliable power to the unmanned underwater vehicle (UUV) and obtaining data in real time by using a tether cable between the UUV and the unmanned surface vehicle (USV). The HSUV uses global positioning system (GPS) and ultra-short base line sensors to determine the relative location of the UUV. Way point (WP) and dynamic positioning (DP) algorithms were developed to enable the HSUV to perform unmanned exploration. After reaching the target point using the WP algorithm, the DP algorithm enables USV to maintain position while withstanding environmental disturbances. To ensure the navigation performance at sea, performance tests of GPS, attitude/heading reference system, and side scan sonar were conducted. Based on these results, manual operation, WP, and DP tests were conducted at sea. WP and DP test results and side scan sonar images during the sea trials are presented.

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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Automatic Train Operation System Requirements Examination for Driverless Operation and Application Case of Urban Maglev Train (무인운전을 위한 자동열차운전장치 시스템 요구조건 검토 및 도시형 자기부상열차 적용사례)

  • Kang, Kyeong-Yong;Cho, Young-Wan;Park, Hee-Jun;Park, Chae-Young
    • Proceedings of the KSR Conference
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    • 2011.10a
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    • pp.1100-1107
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    • 2011
  • The light-rail system which is recently being built in Korea is a train control system based on driverless operation, and the train control system for urban maglev train under construction at the moment in Youngjong-Do, Incheon is pushed ahead based on driverless operation. In this paper, it compares train operation cases with manned operation and unmanned operation to examine system requirements for unmanned driving on train and detects system requirements of automatic train operation device for unmanned operation by analyzing unmanned operation cases which are currently operating or planed project and also introduces automatic train operation of urban maglev train and verifies whether the system for unmanned driving meets the requirements.

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The Control System Modeling and Experiment for the Tele-operated Unmanned Vehicle

  • Duk sun Yun;Lee, Woon-Sung;Kim, Jung-Ha
    • Journal of Mechanical Science and Technology
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    • v.16 no.10
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    • pp.1253-1263
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    • 2002
  • The control system design and modeling of an unmanned vehicle by means of a new concept for better performance through a tole-operation system is suggested by sensor fusion. But, the control of a real vehicle is very difficult, because the system identification of the vehicle is hard to find the unknown factors and the disturbances of the experimental environment. For the longitudinal and lateral controls, the traction system and steering system models are set up and a tuning method to find the gain of the controller by experiments is presented. In this research, mechanical and electronic parts are implemented to operate the unmanned vehicle and data reconstruction method of information about the environment data coming from several sensors is presented by data plot for the vehicle navigation. This paper focuses on the integration of tole-operated unmanned vehicle. This vehicle mainly controlled lateral and longitudinal directions with actuators for controlling vehicle movement and sensors for the closed-loop controlled system.

Implementation of an Obstacle Avoidance System Based on a Low-cost LiDAR Sensor for Autonomous Navigation of an Unmanned Ship (무인선박의 자율운항을 위한 저가형 LiDAR센서 기반의 장애물 회피 시스템 구현)

  • Song, HyunWoo;Lee, Kwangkook;Kim, Dong Hun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.68 no.3
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    • pp.480-488
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    • 2019
  • In this paper, we propose an obstacle avoidance system for an unmanned ship to navigate safely in dynamic environments. Also, in this paper, one-dimensional low-cost lidar sensor is used, and a servo motor is used to implement the lidar sensor in a two-dimensional space. The distance and direction of an obstacle are measured through the two-dimensional lidar sensor. The unmanned ship is controlled by the application at a Tablet PC. The user inputs the coordinates of the destination in Google maps. Then the position of the unmanned ship is compared with the position of the destination through GPS and a geomagnetic sensor. If the unmanned ship finds obstacles while moving to its destination, it avoids obstacles through a fuzzy control-based algorithm. The paper shows that the experimental results can effectively construct an obstacle avoidance system for an unmanned ship with a low-cost LiDAR sensor using fuzzy control.

On the Derivation of Safety Requirements and Specifications based Integrated System Operation Scenario for the Development of Unmanned Courier Storage Device Platform in Urban Areas

  • Lee, Sang Min;Park, Jae Min;Kim, Joo Uk;Kim, Young Min
    • International Journal of Internet, Broadcasting and Communication
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    • v.13 no.4
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    • pp.103-111
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    • 2021
  • In modern society, digital lifestyles are spreading to minimize contact with people and to receive contactless information. The spread trend has established an unmanned distribution system in which transactions through contactless technologies such as kiosks and chatbots are activated in face-to-face transactions with sellers and consumers. In order to streamline logistics supply worldwide, digital new deal based joint logistics hubs, unmanned courier storage platforms, and fresh logistics based last mile services have been developed into unmanned logistics systems, focusing on the intelligent logistics system automation process. Unmanned courier storage system installed in urban areas and home to daily logistics where volume is concentrated are provided with fresh logistics services through cold chain and receiving freights in contactless environments. Development is also underway to minimize safety accidents caused by courier services, such as managing various information based on the integrated control system. This paper defines the concept of integrated operation for the development of a platform for contactless unmanned courier storage device developed into next-generation logistics system. In addition, we intend to develop systems engineering-based output for deriving safety requirements and specifications by identifying risk sources that may occur in the operational scenario. Therefore, the goal is to establish a foundation for safety and reliability between interfaces of logistics systems to be installed in apartment and subway station environments that want to provide unmanned logistics services to various consumers.

Applying Cybersecurity and Anti-Tamper Methods for Secure Operating of Unmanned Weapon Systems (무인화 무기체계의 안정적인 운용을 위한 Cybersecurity 및 Anti-Tamper의 적용)

  • Lee, Min Woo
    • Journal of the Korean Society of Systems Engineering
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    • v.16 no.1
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    • pp.36-42
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    • 2020
  • Due to the population of the Republic of Korea is getting less, the shortage of available troops has become a big issue. In response to this, the need for Unmanned weapon systems is rising. To operate an Unmanned weapon system near borderlines or low altitude, it is necessary to protect not only the system itself but also operational information communicated between the Unmanned system and control station, so that they should be safe using Cybersecurity measures. Besides, it is critical to protect a few core technologies applied to Unmanned weapon systems throughout the Anti-Tamper measures. As the precedent studies only focus partially, Cybersecurity or Anti-Tamper, it is acknowledged that comprehensive studies are needed to be conducted. This study is to incorporate both concepts into Korea's defense acquisition process. Specifically, we will outline the concepts and needs of Cybersecurity and Anti-Tamper, and briefly present ways to apply them simultaneously.