• Title/Summary/Keyword: system uncertainty

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Development of 6-component Force/Moment Calibration Machine (6분력 힘/모멘트 교정기의 개발)

  • 김갑순;강대임
    • Journal of the Korean Society for Precision Engineering
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    • v.15 no.9
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    • pp.127-134
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    • 1998
  • This paper describes the design of a 6-component force/moment calibration machine with having the maximum capacities of 500 N in forces and 50 Nm in moments. To be used for the characteristic of a multi-component load cell. this machine consists of a body, a fixture, a force generating system, a moment generating system and weights. We have also evaluated the accuracy of the calibration machine. Test results show that the expanded relative uncertainty for force components $\pmFx,\;\pmFy\;and\;moment\;components\;\pmMx,\;\pmMy\;are\;less\; than\;8.6\times10^{-4}$, and force components +Fz, -Fz and moment components $\pmMz\;is\;less\;than\;1.6\times10^{-3},\;2.0\times10^{-5},\;1.7\times10^{-3}$ respectively.

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Study on the Precision Method of Measuring angular displacement for the Angular Vibration Calibration System (회전 진동 교정 장치 구현을 위한 고정밀 측정기법에 대한 연구)

  • Cheung, Wan-Sup;Lee, Yong-Bong;Lee, Doo-Hee
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2004.11a
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    • pp.685-688
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    • 2004
  • This paper addresses the study on developing the angular vibration calibration system which requires the highly accurate measurement technique of the amplitude and period of an oscillating angular motion. Two developed models for the low and high frequency ranges are introduced and their main features are also compared. In addition to the angular vibration exciters, a new measurement method, referred to the 'equi-angle sampling method', is proposed and its theoretical backgrounds are introduced. The proposed method is shown to provide much less measurement uncertainty, compared the fringe counting method. Experimental results demonstrate what amount of angular vibration amplitude measurement uncertainty is improved by suing the proposed equi-angle sampling method.

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Hybrid sliding mode control for bilinear system with uncertainty

  • Jeon, Hae-Jin;Lee, Sung-Young;Park, Bong-Yeol
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.60.5-60
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    • 2002
  • $\textbullet$ Introduction $\textbullet$ Bilinear system model $\textbullet$ Design of sliding control and stability analysis $\textbullet$ Design of proposed controller $\textbullet$ Simulations $\textbullet$ Conclusions $\textbullet$ References

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Adaptive Fuzzy Sliding Mode Controller for Nonaffine Nonlinear Systems

  • Park, Jang-Hyun;Kim, Dong-Won;Huh, Sung-Hoe;Park, Gwi-Tae
    • 제어로봇시스템학회:학술대회논문집
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    • 2002.10a
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    • pp.62.6-62
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    • 2002
  • $\textbullet$ Introduction $\textbullet$ Problem Formulation $\textbullet$ Feedback Linearizing Controller Design $\textbullet$ Fuzzy System to Cancel System Uncertainty $\textbullet$ Adatptive Fuzzy Sliding Mode Controller Design $\textbullet$ Simulations $\textbullet$ Conclusions

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On the suboptimal $H_{2}$ Design for Improved Stability Margin (안정도 여유를 고려한 준최적 $H_{2}$ 설계 기법)

  • 박기헌
    • 제어로봇시스템학회:학술대회논문집
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    • 1991.10a
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    • pp.66-70
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    • 1991
  • A mixed $H_{2}$ / H.inf. design methodology is suggested for a single-input-single-output system. Suboptimal $H_{2 }$ controllers stabilizing the closed loop system under the additive uncertainty are obtained. An extended Nevanlinna-Pick algorithm is used to obtain the suboptimal. controllers.s.

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A Study on the new adaptive sliding mode control (새로운 적응 슬라이딩 모드제어에 관한 연구)

  • 박승규;김민찬;정은태;곽군평
    • 제어로봇시스템학회:학술대회논문집
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    • 2000.10a
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    • pp.325-325
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    • 2000
  • This paper proposes a modified adaptive sliding mode control which improve the performance by making the system follow the nominal trajectories controlled by nominal controller. This method is used for the system with unknown parameter uncertainty and bounded uncertainties.

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