New approach to semi-active vibration isolation to improve the pointing performance of observation satellites

Kanjuro Makihara, Junjiro Onoda, Kenji Minesugi

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

A momentum-wheel installed to provide attitude-control torque actually produces undesirable force or torque disturbances owing to wheel imbalance and imperfection of the ball-bearings. To improve the pointing performance of observation satellites, a vibration isolator is used to isolate observation devices from these disturbances. This paper compares three types of semi-active isolators that consist of a piezoelectric material and a switch-controlled passive circuit. Since this isolation is implemented by controlling a circuit switch no external energy is supplied to the system, and so the system is stable even when a malfunction occurs in control. We propose a simple but effective isolation method that needs to know only one velocity value instead of the full state of the system. Numerical simulations with a simple model of an observation satellite demonstrated that the proposed isolator works well to isolate an observation device from disturbances caused by the momentum-wheel, without causing any degradation in the attitude control of satellites.

Original languageEnglish
Pages (from-to)342-350
Number of pages9
JournalSmart Materials and Structures
Volume15
Issue number2
DOIs
Publication statusPublished - 2006 Apr 1
Externally publishedYes

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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