• Title/Summary/Keyword: 3-자유도 헬리콥터 시스템

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A Study on Identification using Particle Swarm Optimization for 3-DOF Helicopter System (3-자유도 헬리콥터 시스템의 입자군집최적화 기법을 이용한 시스템 식별)

  • Lee, Ho-Woon;Kim, Tae-Woo;Kim, Tae-Hyoung
    • Journal of the Korean Institute of Intelligent Systems
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    • v.25 no.2
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    • pp.105-110
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    • 2015
  • This study proposes the more improved mathematical model than conventional that for the 3-DOF Helicopter System in Quanser Inc., and checks the validity about the proposed model by performance comparison between the controller based on the conventional model and that based on the proposed model. Research process is next : First, analyze the dynamics for the 3-DOF helicopter system and establish the linear mathematical model. Second, check the eliminated nonlinear-elements in linearization process for establishing the linear mathematical model. And establish the improved mathematical model including the parameters corresponding to the eliminated nonlinear-elements. At that time, it is used for modeling that Particle Swarm Optimization algorithm the meta-heuristic global optimization method. Finally, design the controller based on the proposed model, and verify the validity of the proposed model by comparison about the experimental results between the designed controller and the controller based on the conventional model.

자유곡면 형상 제품을 위한 CAD 지향의 자동 검사 시스템 개발에 대한 연구

  • 김영호;정무영;박희재
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1992.10a
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    • pp.330-334
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    • 1992
  • 현재 제품의 보다 향상된 의장성과 기능성을 위해서 정밀한 자유곡면 형상의 제품에 대한 수요가 증가함에 따라 자유곡면 형상 제품의 효율적이고 정밀한 설계 및 가공과 함께 제품에 대한 수치 검사가 더욱 중요해지고 있다. 이러한 자유곡면 형상 제품의 예로는 금형, 헬리콥터 프로펠러, 비행기 날개 등이 있다. 이러한 제품의 설계 및 가공을 위해서 많은 CAD/CAM 시스템이 개발되었다. 수치 검사 분야에서는 기하학적으로 복잡한 제품에 대한 정밀하고 효율적인 검사를 위해서, 3차원 좌표측정기을 포함한 컴퓨터의 구동의 수치 검사 장비가 개발되고, 그러한 장비를 이용한 CAI 시스템사용이 다양한 분야에서 점차 증가하고 있다.

헬리콥터 테일팬용 팬-덕트의 공력소음해석 및 소음저감연구

  • Chung, Ki-Hoon;Kang, Hee-Jung;Kim, Hae-Dong;Hwang, Chang-Jeon
    • Aerospace Engineering and Technology
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    • v.3 no.1
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    • pp.45-55
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    • 2004
  • In this study, a time marching free wake method was used for the aerodynamic analysis and the boundary element method was used for the aeroacoustic analysis of the Tail Fan, respectively. In addition, variations of blades position in duct were performed and the aeroacoustic analysis shows a marginal improvement in noise level.

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Observer-Based Output Feedback Stochastic Stabilization for T-S Fuzzy Systems with Input Delay (입력지연을 갖는 T-S 퍼지 시스템의 관측기기반 출력궤환 확률적 안정화)

  • Lee, Sang In;Park, Jin Bae;Joo, Young Hoon
    • Journal of the Korean Institute of Intelligent Systems
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    • v.14 no.3
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    • pp.298-303
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    • 2004
  • This paper deals with a stochastic stabilization of observer-based output-feedback control Takagi-Sugeno (T-S) fuzzy system with Markovian input delay. The finite Markovian process is adopted to model the input delay of the overall control system. It is assumed that the zero and hold devices are used for control input. The continuous-time T-S fuzzy system with the Markovian input delay is discretized for easy handling delay, accordingly, the discretized T-S fuzzy system is represented by a discrete-time T-S fuzzy system with jumping parameters. The stochastic stabilizability of the jump T-S fuzzy system is derived and formulated in terms of linear matrix inequalities (LMIs). The usefulness of the proposed algorithm is also certificated by simulation of 2 degree of freedom helicopter model.