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1995 Fiscal Year Final Research Report Summary

ACTIVE SHARE AND VIBRATION CONTROL OF FLEXIBLE SPACE STRUCTURES

Research Project

Project/Area Number 06651071
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Aerospace engineering
Research InstitutionOSAKA PREFECTURE UNIVERSITY

Principal Investigator

OKUBO Hiroshi  UNIV.OF OSAKA PREFECTURE,DEPT.OF AEROSPACE ENG., ASSOCIATE PROFESSOR, 工学部, 助教授 (40094502)

Co-Investigator(Kenkyū-buntansha) TSUMURA Toshihiro  OSAKA INSTITUTE OF TECHNOLOGY PROFESSOR, 教授 (90081265)
KOMATSU Nobuo  RESEARCH ASSOCIATE, 工学部, 助手 (80215392)
Project Period (FY) 1994 – 1995
KeywordsFLEXIBLE SPACE STRUCTURES / SHAPE CONTROL / VIBRATION CONTROL / LASER MEASUREMENT SYSTEMS / VIBRATION SUPPRESSION / CONTROL SYSTEM DESIGN
Research Abstract

1. Fundamental studies have been done for developing methods of shape measurement, estimation and control for active shape control of flexible structure. The major subjects of the active shape control consists of estimating the deformed shape of a flexible structure from multi-point spatially distributed measurement of the structural deflections and determining the optimal static control force that yields the minimum integrated restoration errors. The estimation and control designs are based on an infinite-dimensional approach that introduces the necessary finite element truncation and approximation after solving the estimation problem. The proposed estimation and control design methods have been applied to a tendon shape control system for a cantilevered beam. The results of numerical simulation show that the magnitude of the restoration errors largely depends on the number of available actuators and their locations.
2. A prototype remote optical sensing device has been developed for the static shape measurement. The main component of the optical sensing system consists of a laser scanner and retro-reflectors (corner cubes) mounted to the experiment structure. The measurement system determines the line of sight vector pointing the target corner cube. Since the laser beams scan all the corner cubes sequentially in each rotation cycle, the proposed method is fitted to the multi-point measurement in short time. The prototype laser scanner has been built in the laboratory and tested for measuring the position translation of the target corner cubes that simulates the structural deflections.
3. A method of robust eigenstructure assignment has been developed for the vibration control of flexible space structures. The proposed method generates attractive gain matrices which reduce the H^* norm to achieve the robust stability for plant perturbations and residual modes. The usefulness of the proposed design approach was validated through numerical simulations.

  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 大久保博志: "柔軟構造物のテンドン制御における構造/制御の統一的設計法" 日本機械学会誌. C60-574. 2009-2016 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Okubo: "Active Shape Control of Flexible Space Structures" Proc.2nd Int.Conf.on Motion and Vibration Control. 533-538 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 室津義定: "知的適応宇宙構造物-その概念と制御" システム制御情報学会誌. 39-3. 142-147 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Okubo: "Tendon Control System for Active Shape Control of Flexible Space Structures" J.Intelligent Material Systems and Structures. 7. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Okubo: "Tendon Control System for Active Shape Control of Flexibl Space Structures" Proc.5th Int.Conf.on Adaptire Structures. 419-428 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 大久保博志: "柔軟宇宙構造物の形状推定と制御" 日本機械学会誌. C62. (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Okubo and G.Schmidt: "Integrated Structural and Control Design for Tendon Control of Flexible Structures (in Japanese)" Trans.JSME. Vol, C60, No.574. 2009-2016 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Okubo, N.Komatsu, T.Tsumura and O.Fukudomi: "Active Shape Control of Flexible Space Structures" Proceedings of the 2nd International Conference on Motion and Vibration Control, JSME. 533-538 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Murotsu and H.Okubo: "Intelligent Adaptive Structures for Space Applications - Concept and Control (in Japanese)" Systems, Control and Information. Vol, 39, No.3. 142-147 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Okubo, N.Komatsu and T.Tsumura: "Tendon Control System for Active Shape Control of Flexible Space Structures" Proc.of the Fifth International Conference on Adaptive Structures, 419-428, Sendai, Dec.1995.also Journal of Intelligent Material Systems and Structures. Vol.7, (to appear). (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Okubo, O.Fukudomi, N.Komatsu and T.Tsumura: "Shape Estimation and Control of Flexible Space structures (in Japanese)" Proceedings of the Dynamics and Design Conference, 45-48, Akita, July. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Okubo, N.Komatsu and S.Zeniya: "Robust Eigenstructure Assignment for Flexible Space Structure (in Japanese)" Preprints of the 39th Space Science and Technology Conference, 603-604, Osaka, Oct.(1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Okubo, N.Komatsu and S.Zeniya: "Robust Pole Assignment for Active Control of Adaptive Space Structures (in Japanese)" Preprints of the 72nd JSME Annual Conference, Narashino, April. (1996)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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