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1999 Fiscal Year Final Research Report Summary

CONTROL METHOD FOR NONILEAR VIBRATION OF ON-ROAD TRAVELING TRACTOR BASED ON CHAOS THEORY

Research Project

Project/Area Number 09660269
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 農業機械学
Research InstitutionTokyo University of Agriculture & Technology

Principal Investigator

SAKAI Kenshi  TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, DEPARTMENT OF ECOLEGION SCIENCE, ASSOCIATE PROFESSOR, 農学部, 助教授 (40192083)

Co-Investigator(Kenkyū-buntansha) SHIBUSAWA Sakae  TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, DIVISION OF BIO-APPLICATIONS AND SYSTEMS ENGINEERING, ASSOCIATE PROFESSOR, 大学院・生物システム応用科学研究科, 助教授 (50149465)
SASAO Akira  TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY, DEPARTMENT OF ECOREGION SCIENCE, PROFESSOR, 農学部, 教授 (70032993)
Project Period (FY) 1997 – 1999
KeywordsNONLIENARDYNAMICS / CHAOS / TRACTOR / VIBRATIONS
Research Abstract

Violent bouncing phenomena arise when a tractor runs on a road under certain conditions and such a violent vibration may lead to fatal accidents. In this report, the bouncing phenomena of tractors were investigated theoretically. A mathematical model was developed to describe tractor bouncing phenomena as a forced nonlinear oscillator. Frequency response analysis was conducted to identify the nonlinearity of developed model. Periodic, period-doubling quasi-periodic and chaotic vibrations were observed by numerical experiments. The results suggested that the developed model can describe unexpected violent vibrations that may cause fatal accidents in a tractor's operations.
Bouncing tractors have been shown to be a potentially chaotic system by the author's previous theoretical study. The conducted numerical experiments predicted nonlinear vibrations such as periodic, period-doubling, quasi-periodic and chaotic vibrations. In this paper, the dynamics of a bouncing tractor were investigated experimentally and the results predicted in the previous study were validated. In addition, a bifurcation structure of the dynamical system of the bouncing tractor were clarified experimentally, and nonlinear resonance was observed in this experiment.

  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Kenshi Sakai: "Theoretical Analysis of Nonlinear dynamics ad*****"農学機械学会誌. 61(6). 63-72 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 酒井憲司: "小型トラクタの高速化と安定性"農学機械学会誌. 62(1). 8-12 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Sakai K, et al: "Nonlinear Resonance of an Rad Traveling S*** Tra***l"ASAE-Paper. 99/066. 10 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] KENSHI SAKI: "THEORETICAL ANALYSIS OF NONLINEAR DYNAMICS AND CHAOS IN BOUNCING TRACTOR"JSAM. 61(6). 65-71 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] KENSHI SAKAI: "STABILITY OF SMALL TRACTOR ON-ROAD HOGH SPEED"JSAM. 62(1). 8-12 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] KENSHI SAKAI, et al.: "nomlimear resonance of on road traveling"asae-paper. 91066. 10 (1999)

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

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Published: 2001-10-23  

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