GYROSCOPE STANDARD GYROCOMPASSING ACCURACY TEST
Abstract
The Central Inertial Guidance Test Facility (CIGTF) standard gyrocompassing accuracy test and associated data analysis procedures for single- degree-of-freedom gyros are presented. The gyrocompassing error, the error in the north direction as determined by the gyroscope, is obtained by orienting the gyro in four specific orientations and measuring the output of the gyro while in the torque-to-balance mode. This procedure is repeated 24 times for a total of 25 north determinations during which the gyro is not shut down. From these data a determination is made of the average gyrocompassing error and of the operating instability of the gyrocompassing error. This 'operating' phase is followed by a 'shutdown' phase consisting of 10 north determinations, each separated by a two- hour gyro shutdown and two-hour warmup. From these data the shutdown instability of the gyrocompassing error is determined. Although the test and data analysis procedures described in this report are written specifically for single-degree- of-freedom gyros, the theory can easily be applied to two-degree-of-freedom gyros. This report also contains a description of the CIGTF gyroscope laboratory's two axis automated gyrocompassing test station and a test error analysis.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1967
- Accession Number
- AD0670523
Entities
People
- Hayne A. Thompson Jr.
- Judith Koestler