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DYNAMIC BEHAVIOR OF NONLINEAR DYNAMICAL SYSTEMS UNDER DEGRADATION OF CONTROL SIGNALS

Research Project

Project/Area Number 07650292
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Dynamics/Control
Research InstitutionMEIJI UNIVERSITY

Principal Investigator

EHARA Noburo  MEIJI UNIVERSITY SCHOOL OF SCIENCE & TECHNOLOGY PROFESSOR, 理工学部, 教授 (00185133)

Co-Investigator(Kenkyū-buntansha) SHIMOSAKA Haruo  MEIJI UNIVERSITY SCHOOL OF SCIENCE & TECHNOLOGY PROFESSOR, 理工学部, 教授 (10139462)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥600,000 (Direct Cost: ¥600,000)
KeywordsDEGRADATION OF CONTROL SIGNALS / NONLINEAR DYNAMICS / MODEL REFERENCE CONTROL / ACCURACY OF TRAJECTORY CONTROL / MOTION OF HUMAN ARMS / STATIC WALKING / STABILITY OF HUMAN WALKING
Research Abstract

In this research, dynamical behavior of nonlinear mechanical system under the change of control information such as degradation or time-lag is investigated.
First, model reference tracking control of simple mass-spring-damping system is considered. Dynamic behavior of the system under the degradation of the control signal is discribed. Convergence of the system response is getting worth when the feedback signal degenerates. If the feedback signal has the time lag, the response depends on the damping coefficient of the real system. The output becomes extremely large at the case that the lag is a half of the natural period of the real system.
Then, dynamic behavior of two link robot manipulator with signal degradation or time delay is discussed. This is one of the modeling of human dynamics of upper limb. Effects of the change in the control signal is analyzed when trajectory of the arm is a circle, S-shape and crank pattern. Dynamics of the trajectory control of the arm are evaluated by using error factor of the end point and accuracy of the trajectory of the arm. An evaluating method is introduced. Simulation results show that accuracy of the trajectory control become change over 40% under 10% degradation of the control signal and over 6% even under 1% change.
Finally, dynamic behavior of human static walking with signal degradation is discussed.
The control signal is the time pattern of each joint angle. Effects of the changes of the control signals to the stability of static walking are analyzed using 10-links dynamical model.
Simulation results show that stability of static walking change drematically under small variation of control signal degradation and time delay.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 江原 信郎・下坂 陽男: "制御情報の劣化・遅延による機械システムの動特性" 明治大学理工学部研究報告. 第15号. 17-28 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] NOBURO,EHARA HARUO,SHIMOSAKA: "DYNAMIC BEHAVIOR OF MECHANICAL SYSTEMS UNDER DEGRADATION OF CONTROL SIGNALS" RESEARCH REPORTS,SCHOOL OF SCIENCE AND TECHNOLOGY,MEIJI UNIVERSITY. No.15 (71). 17-28 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 江原信郎,下坂陽男: "制御情報の劣化・遅延による機械システムの動特性" 明治大学理工学部研究報告. 第15号. 17-28 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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