• Title/Summary/Keyword: 자세제어장비

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Modeling and Simulation of a Ship with Anti-Rolling Devices in Waves (자세제어장비를 장착한 선박의 파랑중 운동 모델링 및 시뮬레이션)

  • 윤현규;이경중;이창민
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2004.04a
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    • pp.285-290
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    • 2004
  • Wave exciting force and moment generate the motions of a ship in waves. Since ship motion exerts the negative influences on a crew's operability, the safety of cargos, passenger's comfort, etc, the anti-rolling devices may be required to reduce such motion. In this paper, the dynamics of the anti-rolling devices such as passive and active moving weight stabilizer and anti-rolling tank, and fin stabilizer are mathematically modeled. While the effect of the motion of the anti-rolling device on a ship was taken into consideration in roll mode only in the past, the 6 DOF coupled equations of motion between a ship and the anti-rolling devices are constituted. Finally the motion of a ship with anti-rolling devices in waves is simulated through the developed simulation program.

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Modeling and Simulation of a Ship with Anti-Rolling Devices in Waves (자세제어장비를 장착한 선박의 파랑중 운동 모델링 및 시뮬레이션)

  • Yoon, Hyeon-Kyu;Lee, Gyeong-Joong;Lee, Chang-Min
    • Journal of Navigation and Port Research
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    • v.28 no.5
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    • pp.347-352
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    • 2004
  • Wave exciting force and moment generate the motions of a ship in waves. Since ship motion exerts the negative influences on a crew's operability, the safety of cargos, passenger's comfort, etc, the anti-rolling devices may be required to reduce such motion In this paper, the dynamics of the anti-rolling devices such as passive and active moving weight stabilizer and anti-rolling tank, and fin stabilizer are mathematically modeled While the effect of the motion of the anti-rolling device on a ship was taken into consideration in roll mode only in the past, the 6 DOF coupled equations of motion between a ship and the anti-rolling devices are constituted Finally the motion of a ship with anti-rolling devices in waves is simulated through the developed simulation program.

Attitude Control Tests for a High Speed Catamaran in Regular Head Waves (고속 카타마란선의 규칙 정면파중 운항자세 제어 시험)

  • C.G. Kang;S.Y. Hong;S.H. Suh;C.M. Lee;Y.G. Kim;I.Y. Gong
    • Journal of the Society of Naval Architects of Korea
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    • v.33 no.2
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    • pp.36-43
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    • 1996
  • An Attitude Control System for a high speed catamaran with contorl fins in waves is designed and investigated by the experimental methods. An optimal control theory is applied to design the automatic attitude control system of the high speed catamaran for its good seaworthiness. The experimental results performed in KRISO model basin for the displacements and accelerations for the model ship are measured in regular hear waves. Form the epxerimental results the effect of control planes is thought to be incroeasing with speed.

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Application of SIMC Based Quad-rotor Cascade Control by Using 1-axis Attitude Control Test-bench (1축 자세제어실험 장비를 이용한 SIMC 기반 쿼드로터 Cascade 제어기 적용에 관한 연구)

  • Choi, Yun-sung;You, Young-jin;Jeong, Jin-seok;Kang, Beom-soo
    • Journal of Advanced Navigation Technology
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    • v.19 no.6
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    • pp.473-483
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    • 2015
  • This paper reports the single-input-single-output cascade control by using 1-axis attitude control test-bench for quad-rotor UAV. The test-bench was designed as a see-saw shape using 2 motors and propellers, and to enable changing the center of gravity with the center of gyration using ballast. The experiment was carried out by constructing a PID-PID controller having a cascade structure with the test-bench. The SIMC based PID gain tuning process, which makes PID gain tuning easy, was grafted to cascade control. To graft SIMC method, the system parameter estimation result was conducted with second order time delay model by using Matlab-Simulink. Gain tuning was conducted by simulating with estimated system parameter. In this paper, the conventional application of SIMC was conducted and improved application was proposed for improving stability at tuning process.

Development of Free Running Model Ship for Evaluation of the Performance of Anti-Rolling Devices (자세제어장비 성능시험을 위한 자유항주 모형선 개발)

  • Yoon Hyeon-Kyu;Lee Gyeong-Joong;Son Nam-Sun;Yang Young-Hoon
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2004.11a
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    • pp.33-39
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    • 2004
  • A ship runs with various modes of motion due to waves. Among the modes, roll mainly influences on the safety of cargos and crew's fatigue. Therefore a ship equipped with anti-rolling devices are on an increasing trend. In this research, we developed a free running model ship to evaluate the performances of fin stabilizer and moving weight stabilizer. Also those performance tests were carried out through the proposed test procedure.

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An Experimental Study of a Single Axis Seesaw Attitude Control Consisting of Motor and Propeller (모터와 프로펠러로 구성된 시소형 1축 자세 제어 실험에 관한 연구)

  • Kim, Jae-Nam;Roh, Min-Shik;Song, Jun-Beom;Song, Woo-Jin;Kang, Beom-Soo;Kim, Jeong
    • Journal of Advanced Navigation Technology
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    • v.16 no.1
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    • pp.1-7
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    • 2012
  • In this research, a single-axis attitude control test bed is developed, and simulation and tests experiments are performed, as a preliminary research of a quad-rotor aerial vehicle development. A single-axis test bed with seesaw configuration is manufactured using two motors and propellers, and the aerodynamic parameters are derived by thrust tests. The response of the system is estimated with Matlab/Simulink, and experiments are performed with attitude control computer and an attitude sensor onboard the test bed. Comparing the results of simulated and tested data, factors of steady-state errors during experiments are found, and performances of used attitude control algorithm and the control computer were verified. In these process, essential preliminary data for attitude control of a quad-rotor unmanned aerial vehicle were acquired.

Application and Validation of Delay Dependent Parallel Distributed Compensation Controller for Rotary Wing System (회전익 시스템의 시간지연 종속 병렬분산보상제어기 적용과 검증)

  • You, Young-Jin;Choi, Yun-Sung;Jeong, Jin-Seok;Song, Woo-Jin;Kang, Beom-Soo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.44 no.12
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    • pp.1043-1053
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    • 2016
  • In this paper, the application of Parallel Distributed Compensation (PDC) controller for fixed pitch rotary wing system was studied. For nonlinear modeling, T-S fuzzy model was utilized to advance system control including the tilt type UAV. PDC controller was designed through the Linear Matrix Inequality (LMI). Experiments for determining the applicability and feasibility of PDC were performed using the 1 axis attitude control equipment and simulation. To verify the performance and characteristics of the controller, Mathworks Co. Simulink was used. After then, the PDC controller performance was verified and the results with developed controller using a 1 axis attitude control equipment were compared. Verification of the feasibility of PDC controller for the fixed pitch rotary wing system and identification of the overall performance and improvement analysis was conducted based on the experimental results.

A Study on the Ballast Control System for Offshore Plant (Offshore Plant용 발라스트 제어 시스템에 관한 연구)

  • Oh, Jin Seok
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.17 no.12
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    • pp.2944-2951
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    • 2013
  • Recently, the offshore plant has been revived by rise in oil prices and energy consumption. Due to the external environmental impact, the ballast system is essential for an offshore plant. The ballast system for the existing offshore plant, consist of pump 6EA and Ballast tank 4EA, is performed by the tilt control. However, this system is vulnerable to a failure due to the fact that a lot of equipment needs to be installed within the system. In this paper, a new concept of ballast system and the control algorithm based on IT is proposed. Simulator has been created to test the proposed system and algorithm, and as a result, it has proven that it is controlled stably.

Study on Design of Advanced Smart Postural Change Device for Supine Posture Control (와상체위제어를 위한 스마트 고기능 자세변환기의 설계에 관한 연구)

  • Park, Seung Hwan;Jung, Jin Taek;Sim, Woo Jung;Kim, Yung Sear
    • 재활복지
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    • v.18 no.4
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    • pp.221-235
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    • 2014
  • Recently, the frequency of stroke disease is increased due to the rapid aging population, and is contributed to the major occurrence factors of the posteriori acquired disability. This study is about an postural change device for the control of supine posture which is an assisted equipment using in daily rehabilitation process for overcoming the disability by the aftereffects of the stoke disease. In this paper, the existing domestic and Japan postural appliances is examined and its comparison and categorization is performed according to its functions and purposes. Here, in order to control the supine posture state, the design method for advanced multi functional system is proposed, which is devised to have an unified mattress control operations of combining the bedsore prevention tube with the supine posture tilting tube. And also, in addition of an smart function, it is designed to enable to perform an RF functions such as the monitoring of the present device state, the alteration of the basic position and the control of alternative floating and supine posture. This system control hardware consists of three main parts : the sensor detection part, the motor driving /control part, and the system control part for bluetooth communication. In results, we confirmed that the system designed by this research is possible to make it practical as an advanced smart postural change device combined by IoT technology in the application field of the recent IT technology.