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http://dx.doi.org/10.7735/ksmte.2013.22.1.107

Mechanical Design of Ring Laser Gyroscope Using Finite Element Method  

Lee, Jeong Ick (인하공업전문대학 기계공학부 기계설계과)
Publication Information
Journal of the Korean Society of Manufacturing Technology Engineers / v.22, no.1, 2013 , pp. 107-111 More about this Journal
Abstract
The gyroscopes have been used as a suitable inertial instrument for the navigation guidance and attitude controls. The accuracy as very sensitive sensor is limited by the lock-in region (dead band) due to the frequency coupling between two counter-propagating waves at low rotation rates. This frequency coupling gives no phase difference, and an angular increment is not detected. This problem can be overcome by mechanically dithering the gyroscope. This paper presents the design method of mechanical dither by the theoretical considerations and the verification of the theoretical equations through FEM applications. As a result, comparing to the past result, the maximum prediction error of resonant frequency was within 3 percent and peak dither rate was within 5 percent. It was found that the theoretical equations can be feasible for the mechanical performance of dither.
Keywords
Ring laser gyroscope; Lock-in region; Dead band; Mechanical dither; Resonant frequency; Torsional stiffness; Peak angular amplitude; Peak dither rate; Finite element method(FEM);
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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