Acoustic noise reduction in the MK 49 ship´s inertial navigation system (SINS)

Author

Lahham, J.I. ; Brazell, J.R.

Author_Institution

Sperry Marine Inc., Charlottesville, VA, USA

fYear

1992

fDate

23-27 Mar 1992

Firstpage

32

Lastpage

39

Abstract

Sperry Marine has devised a passive structure-borne noise isolation system that reduces the noise generated by dithered ring laser gyroscopes to levels below the requirements of MIL-STD-740-2. Descriptions of some of the analytical and experimental processes required to develop this system are presented, together with structure-borne noise test results. Results show that a 47-dB structure-borne noise reduction has been achieved with a noise isolation system that is compatible with the stability and repeatability required by navigation systems. The noise reduction techniques presented have enabled Sperry Marine to develop a dithered ring laser gyroscope navigator feasible for naval applications, the MK 49

Keywords

acoustic noise; gyroscopes; inertial navigation; military equipment; noise abatement; ships; MIL-STD-740-2; MK 49; Sperry Marine; acoustic noise; dithered ring laser gyroscopes; inertial navigation system; laser gyroscope navigator; naval applications; noise isolation system; noise reduction; noise test; passive structure-borne noise; repeatability; ships; stability; Acoustic noise; Gyroscopes; Inertial navigation; Laser noise; Noise generators; Noise level; Noise reduction; Ring lasers; Stability; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Position Location and Navigation Symposium, 1992. Record. 500 Years After Columbus - Navigation Challenges of Tomorrow. IEEE PLANS '92., IEEE

Conference_Location

Monterey, CA

Print_ISBN

0-7803-0468-3

Type

conf

DOI

10.1109/PLANS.1992.185816

Filename

185816