Laser gyro dither strippr gain correction method and apparatus
US5486920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 1993 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Oct 1, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/664
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sampling method and apparatus for sampling a dither signal includes the step of sensing a number of peak amplitudes P.sub.1, P.sub.2, P.sub.3 . . . P.sub.n each of the number of peak amplitudes having a corresponding times t.sub.1, t.sub.2, t.sub.3 . . . t.sub.n while simultaneously sensing a number of ring laser gyro output angles at each of the corresponding times t.sub.1, t.sub.2, t.sub.3 . . . t.sub.n. A value of the gyro net output, .DELTA..phi., is calculated as .DELTA..phi.=(.phi..sub.n -.phi..sub.n-1)-(.alpha..sub.n -.alpha..sub.n-1)K, where K is a correction factor. Alternatively, the stripped gyro angle output may be calculated as .phi..sub.g =.phi..sub.n -.alpha..sub.n K. Where .phi..sub.g is substantially equivalent to the sum of all of the changes in the stripped gyro angle, that is the sum of all .DELTA..phi.'s. The correction may include corrections for gain, phase angle, nonlinearity, temperature bias and scale factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.