Variation of resonant frequency due to thermal and loading conditions on torsion bar dither mechanism in Ring laser gyroscope

  K.Venkata Rao,  K.Veladri,  C.Narashima Reddy

Ring laser gyro is used in inertial navigation system. It works on the principle of sagnac effect. It has the inherent property to go out of operation at low rotation rates as it goes into dead (lock-in) band. The performance of RLG can be enhanced by keeping it out of dead band. A peizo driven mechanical actuator commonly known as mechanical dither in RLG is engaged to avoid the dead band. This paper presents the selection of material, model and analysis of the mechanical dither in RLG. Structural, thermal analysis is analyzed in the range of -30 to 70 degree centigrade by using finite element analysis. Finite element analysis is also used to find the different resonant frequencies, stresses and strains.

Keywords- Navigation, Rlg, mechanical dither, lock-in, sagnac effect, beat frequency.

Unique Identification Number - IJEDR1702129
Page Number(s) - 775-778
Pubished in - Volume 5 | Issue 2 | April 2017
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  K.Venkata Rao,  K.Veladri,  C.Narashima Reddy,   "Variation of resonant frequency due to thermal and loading conditions on torsion bar dither mechanism in Ring laser gyroscope", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 2, pp.775-778, April 2017, Available at :http://www.ijedr.org/papers/IJEDR1702129.pdf