Acoustic and vibration isolation for a gravity gradiometer

A. Sunderland, Y. Naveh, L. Ju, D. G. Blair, R. Lockwood, B. Anderson, M. Dransfield

Research output: Contribution to journalArticlepeer-review

Abstract

Vibration in the audio frequency band affects the performance of rotating gravity gradiometers used for airborne mineral exploration. This is probably due to translation to rotation coupling inside the gradiometer platform. It was found that the DC gravity gradient signal was proportional to the square of the third time derivative of position, or jerk squared. The demanding airborne environment for such instrumentation demands a light weight broadband acoustic shield and vibration isolator. This paper presents the design principles for such an isolator, based on vibration isolated spherical shell structures. Performance data are presented as well as flight test data that demonstrated a 14% gravity gradient noise reduction compared with an unshielded instrument.

Original languageEnglish
Article number064502
JournalReview of Scientific Instruments
Volume93
Issue number6
DOIs
Publication statusPublished - 1 Jun 2022

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