Suppression of dynamic offset of electromagnetic drive module for micro-gyroscope

Nan-Chyuan Tsai, Jiun Sheng Liou, Chih Che Lin, Tuan Li

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

An innovative 3-phase alternative current (AC) drive circuit for the seismic disc in micro-gyroscopes is designed and verified by computer simulations and experiments. The in-plane dynamic model of the seismic disc with mass eccentricity and air gap against the centre bearing and the mathematic expression of two sinusoidal magnetic fields are developed respectively. In order to prevent the seismic disc from collision with the centre bearing and the electromagnetic (EM) poles, an anti-collision controller is established by employing two look-up tables which define the intensity of the applied current to the EM poles. Self-sensing technique is included to measure the real-time offset of the disc by two orthogonal pairs of EM poles, without any additional sensors. The drive circuit under sinusoidal pulse width modulation (SPWM) operation and the anti-collision strategy are verified by intensive computer simulations via commercial software, OrCAD 9, and experiments.

Original languageEnglish
Pages (from-to)680-693
Number of pages14
JournalMechanical Systems and Signal Processing
Volume25
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Signal Processing
  • Civil and Structural Engineering
  • Aerospace Engineering
  • Mechanical Engineering
  • Computer Science Applications

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