• Title/Summary/Keyword: 조종응답

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Aeroservoelastic Modeling and Gust Response Analysis of Flexible Wing for Gust Response Alleviation (유연날개 돌풍응답경감제어를 위한 서보공탄성 모델링 및 돌풍응답해석)

  • Kim, Sung-Chan;Hong, Chang-Ho
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2010.04a
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    • pp.488-491
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    • 2010
  • 본 논문에서는 돌풍응답경감제어 효과 검증을 위한 풍동시험에 사용될 유연날개에 대해 공탄성 모델, 조종면 작동기 모델, 돌풍 모델 등으로 구성되는 서보공탄성 모델링을 수행하였으며, 이에 대한 연속돌풍 응답해석을 수행하여 상용 Solver를 이용한 해석결과와 비교하여 구성된 서보공탄성 모델을 검증하였다. 또한, 유연날개의 돌풍응답을 경감하는 조종면 제어기를 설계하고, 이에 대한 수치 시뮬레이션을 수행하여 돌풍응답 경감효과를 검증하였다.

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Mathematical Model for Dynamics of Manta-type Unmanned Undersea Vehicle with Six Degrees of Freedom and Characteristics of Manoeuvrability Response (Manta형 무인잠수정의 6자유도 운동 수학모델 및 조종응답 특성)

  • Sohn, Kyoung-Ho;Lee, Seung-Keon;Ha, Seung-Pil
    • Journal of the Society of Naval Architects of Korea
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    • v.43 no.4 s.148
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    • pp.399-413
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    • 2006
  • Mathematical model for coupled motions of Manta-type Unmanned Undersea Vehicle(UUV) moving with six degrees of freedom, is formulated. Furthermore, a calculation method for estimating the linear hydrodynamic derivatives acting on UUV, is proposed, and some of the estimated linear hydrodynamic derivatives are compared with results of captive model experiment. Based on linear dynamic model of UUV, a study was made to examine dynamic stability and turning ability in horizontal plane. And directional stability and required elevation rudder angles for neutrally operating in vertical plane, are also discussed.

실습선 아라호(A-RA)의 조종성능에 관한 연구

  • 안영화;박명호;최찬문;정용진
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2001.10a
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    • pp.73-74
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    • 2001
  • 선박의 조종성능은 풍조나 파랑등 외력에 의한 영향이나 그 선박의 홀수, 속력등 항행환경에 따라서 조종성능이 달라 질 뿐만 아니라 조타에 대한 선체의 응답운동이 달라지게 된다. 따라서, 조선자는 선박이 항행중 다른 선박이나 위험물에 접근 했을 때 안전하게 피항하기 위해서는 그 선박에 대한 선회성과 추종성 등 조타에 의한 조종 성능을 잘파악하고 있어야 하며, 이러한 조종 성능은 일반적으로 선회시 선회권에 의한 종거 및 횡거와 선회경의 크기로 결정되는 선회성과 조타에 의한 선체운동등 추종성을 나타내는 조종성 지수로써 그 선박에 대한 조종성능의 양부를 판별하게 되는 것이다. (중략)

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A Study on the Memory Effect of the Radiation Forces in the Maneuvering Motion of a Ship (선박(船舶)의 파랑중(波浪中) 조종운동(操縱運動)에 있어서 동유체력(動流體力)에 의한 메모리 효과(效果))

  • Seung-Keon Lee
    • Journal of the Society of Naval Architects of Korea
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    • v.29 no.3
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    • pp.53-58
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    • 1992
  • The memory effect in maneuvering motion is very small and usually neglected. But, considering the maneuvering motion in waves, we need to calculate the memory effect strictly. Meanwhile. it is popular to treat the wave exciting forces as the steady sinusoidal forces and simply add to the right-hand side of the equation of the motion. This paper treats the memory effect in maneuvering motion when we take the wave exciting forces as the simple external forces and discuss the validity of such treatments.

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Design of Control System for Gust Load Alleviation using Control Surface (조종면을 이용한 돌풍하중완화 제어시스템 설계)

  • Lee, Sang-Wook;Kim, Tae-Uk;Hwang, In-Hee;Ha, Chul-Keun
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.32 no.8
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    • pp.109-117
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    • 2004
  • A study on gust load alleviation using aircraft control surface was performed. Aeroservoelastic model including control surface controller was formulated and validated by comparing the results of continuous gust response analysis with those of MSC/NASTRAN. Optimal control with output feedback was adopted for designing the control surface controller, and the effects of gust load alleviation was validated by performing the numerical simulation for the controller designed.

Steady/Unsteady Cavitating Flow Analysis of Pilot Valve in Flight Actuator System Using Dynamic Moving Mesh (Dynamic Moving Mesh 기법을 이용한 비행조종작동기 제어용 파일럿 밸브 내부 정상/비정상 캐비테이션 유동 해석)

  • Son, Kap-Sik;Lee, Sea-Wook;Kim, Dae-Hyun;Kim, Sang-Beom;Park, Sang-Joon;Jang, Ki-Won;Cho, Jin-Soo
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.7
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    • pp.634-642
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    • 2011
  • A numerical analysis of steady/unsteady flow applying cavitation model and moving mesh method was carried out in order to analyze flow and response characteristics inside the pilot valve which controls the flight actuator system. The flow of the valve was assessed according to operation temperature and time. This research has found that valve characteristics became stable at above a specific temperature and the cavitation affected valve's performance. Internal pressure and response characteristics of the valve were analyzed and flow characteristics of steady and developed unsteady flow were confirmed to be matched each other.

Development of the Ship Manoeuvring PC Simulator Based on the Network (네트워크 기반의 간이 선박조종 시뮬레이터 개발)

  • Choi, Won-jin;Kim, Hyo-Il;Jun, Seung-Hwan
    • Journal of Navigation and Port Research
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    • v.43 no.6
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    • pp.403-412
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    • 2019
  • The characteristics of the manoeuvring motion of a ship are dependent on the ship type, as well as draft or speed in the same ship. In recent years, the number of extra-large vessels has increased significantly, which can cause enormous material and environmental damage in the event of a marine accident. Thus, the importance of ship maneuvering is increasing. The IMO has forced the officers to be trained in simulators through the STCW 95 amendment. However, FMSS is costly and difficult to access and the PC-based simulator has the disadvantage that only one person can engage in simulation. The purpose of this study was to solve the shortcomings of the FMSS and PC-based simulators by enabling multiple people to use their PCs to simulate based on a network. The simulator is implemented through the analysis and numerical calculation of the Nomoto model, Radar function mounting, data transfer protocol design, and GUI building. To verify the simulator, the simulation results were compared and analyzed with the test results of T.S. HANBADA according to the criteria of the Korean Register of Shipping(KR) and IMO standards for ship maneuverability. As a result, It showed a relative error of 0%~ 32.1% with an average of 13.7%, and it satisfied the IMO criteria for ship maneuverability.

Application of Sensitivity Analysis to Vehicle Handling with Equivalent Cornering Stiffness (등가 코너링강성을 사용한 차량의 조종안정성에 대한 민감도 해석)

  • Lee, Chang-Ro
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.13 no.4
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    • pp.1434-1439
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    • 2012
  • Vehicle is a dynamic system combined with various parameters. Dynamic characteristics of a vehicle can vary with the change of these parameters. To investigate the effect of the design parameter on vehicle handling performance the sensitivity analysis is carried out by the numerical method. The vehicle model is described by equivalent cornering stiffness that considers parameters of suspension and steering system. As the analysis results show the effect on the static and dynamic characteristics of the vehicle system, the sensitivity analysis can be used for synthesis of the design parameters to improve the vehicle handling characteristics at the design stage as well as during the vehicle test under development.

Study on Torque and Engaging time Analysis of Micro-Electromagnetic Clutch by Using FEM (FEM을 이용한 Micro-Electromagnetic Clutch 토크와 응답시간해석)

  • Park, Chang-Hao;Kim, Myoung-Gu;Lee, Heung-Shik;Cho, Chong-Du
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.18 no.1
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    • pp.21-28
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    • 2005
  • This study tries to analyzes the torque and engaging time generated in a micro-electromagnetic clutch by using FEM. For the purpose of design change and optimization of the micro-electromagnetic clutch, the torque prediction is very important. We employ a mathematical approach based on the electromagnetic principle. For torque prediction, real material properties are substituted to the constructed axi-symmetric FEM model to obtain the analytical torque and engaging time. The predicted torque and engaging time are compared with those obtained by experiments to discuss the validity of torque and engaging time analysis. The analytical results agrees well with experimental data, therefore explaining the validity of the torque and engaging time prediction method.