Fault detection and isolation (FDI) algorithms are required to achieve a sole-means navigation system using GPS and Loran-C. In order to provide a better understanding of the Fault Detection and Isolation algorithm, a simplified example is presented using three voltmeters to measure a single voltage. The two redundant measurements allow for the full characterization of the FDI algorithm.
Because navigation systems will depend on FDI for integrity assurance, the availability of a navigation system will depend on the availability of at least two redundant measurements. A Markov analysis, combined with a GPS coverage program, is presented to show that GPS by itself could meet supplemental availability requirements for fault detection, but not for isolation. An example of an integrated navigation system, GPS/Loran-C, is presented and actual flight data is used to demonstrate the FDI algorithm in the presence of signal failures. Computer simulations are performed to inject artificial failures into GPS and Loran-C signals, and the results of the FDI algorithm are displayed pictorially.
The report summarizes the results of static and navigation tests conducted in the Boston, Massachusetts area during the period of January through Apri...
This study describes the development of a Receiver Autonomous Integrity Monitoring (RAIM) algorithm to meet the requirements for sole means navigation...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.
United States Department of Transportation
[PDF-3.72 MB]
