Compensation to imperfect fabrication and asymmetry of micro-gyroscopes by using disturbance estimator

Nan-Chyuan Tsai, Chung Yang Sue

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Owing to the imposed coupling accelerations such as quadrature error and cross-axis perturbation, the micro-machined gyroscope could not be unconditionally retained at resonant mode. Once the preset resonance is not sustained, the performance of the micro-gyroscope is accordingly degraded. In this paper, a direct model reference adaptive control loop which is integrated with a modified disturbance estimating observer (MDEO) is proposed to guarantee the resonant oscillations at drive mode and counterbalance the undesired disturbance caused by quadrature error and cross-axis perturbation. The parameters of controller are on-line innovated by the dynamic error between the MDEO output and expected response. In addition, Lyapunov stability theory is employed to examine the stability of the closed-loop control system. At last, the efficacy of evaluation of the exerted time-varying angular rate, which is to be detected and measured by the gyroscope, is verified by intensive simulations.

Original languageEnglish
Pages (from-to)1803-1814
Number of pages12
JournalMicrosystem Technologies
Volume15
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

Fingerprint

Gyroscopes
gyroscopes
estimators
disturbances
asymmetry
quadratures
Fabrication
fabrication
estimating
model reference adaptive control
counterbalances
Model reference adaptive control
perturbation
Closed loop control systems
controllers
Controllers
oscillations
evaluation
output
Compensation and Redress

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering

Cite this

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abstract = "Owing to the imposed coupling accelerations such as quadrature error and cross-axis perturbation, the micro-machined gyroscope could not be unconditionally retained at resonant mode. Once the preset resonance is not sustained, the performance of the micro-gyroscope is accordingly degraded. In this paper, a direct model reference adaptive control loop which is integrated with a modified disturbance estimating observer (MDEO) is proposed to guarantee the resonant oscillations at drive mode and counterbalance the undesired disturbance caused by quadrature error and cross-axis perturbation. The parameters of controller are on-line innovated by the dynamic error between the MDEO output and expected response. In addition, Lyapunov stability theory is employed to examine the stability of the closed-loop control system. At last, the efficacy of evaluation of the exerted time-varying angular rate, which is to be detected and measured by the gyroscope, is verified by intensive simulations.",
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Compensation to imperfect fabrication and asymmetry of micro-gyroscopes by using disturbance estimator. / Tsai, Nan-Chyuan; Sue, Chung Yang.

In: Microsystem Technologies, Vol. 15, No. 12, 01.12.2009, p. 1803-1814.

Research output: Contribution to journalArticle

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