Accession Number : ADD011819

Title :   Precise Bearing Support Ditherer with Piezoelectric Drive Means.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Assard,G L ; Moorcroft,A L

Report Date : 11 Jun 1985

Pagination or Media Count : 6

Abstract : A relatively solid mounting surface, which may be part of a leveling gimbal, supports a piezoelectric bearing mount which has the properties of an acoustic transducer. The transducer has electrodes thereon which are powered from multi-phase electrical sources causing the bearing mount, and a bearing jewel which is rigid therewith, to move so as to dither the jewel in a rotary or other preselected fashion, thereby reducing bearing friction. Bandwidth, level and phasing sequence of the power sources are adjustable permitting optimized average dynamic motion and corresponding increased readout accuracy. (Author)

Descriptors :   *PATENTS, *JEWEL BEARINGS, *PIEZOELECTRIC TRANSDUCERS, *VIBRATORS(MECHANICAL), *MEASURING INSTRUMENTS, *COMPASSES, ELECTROACOUSTIC TRANSDUCERS, MOUNTS, ELECTRODES, VIBRATION, PIEZOELECTRIC MATERIALS, PSEUDO RANDOM SYSTEMS, SOURCES, SURFACES, POWER SUPPLIES, SOLIDS, FRICTION, MOTION, GIMBALS, DRIVES, DYNAMICS, LEVELING, PRECISION, TRANSDUCERS

Subject Categories : Machinery and Tools
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE