Method and apparatus for determining the operational state of a navigation system
US7840381B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2008 |
| Grant date | Nov 23, 2010 |
| Priority date | — |
| Expiry date | Jun 6, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of determining an operational state of a navigation system of a platform is provided. The method comprises testing at least a portion of hardware in the navigation system. Additionally, a measurement of at least one navigation variable from an inertial sensor is combined with a measurement of another navigation variable. A plurality of residuals for the measurement of at least one navigation variable and the measurement of another navigation variable are determined with a blending filter. An error for the measurement of at least one navigation variable is estimated based on the plurality of residuals. The method also predicts an error for the measurement of at least one navigation variable while the navigation system is in route. A determination is made as to whether the navigation system meets operational standards based on testing at least a portion of hardware, estimating an error for the measurement of at least one navigation variable, and predicting an error for the measurement of at least one navigation variable. Finally, one of a first state and a second state of the navigation system is output, the first state indicating that the navigation system does meet operati…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.