Integrated Navigation Satellite/Inertial System Flight Test Analysis
Abstract
A simulation of an integrated airborne 621B Satellite/Inertial navigation system is planned in which a ground-based beacon configuration will be used in place of the satellites. The TRW Systems Group has designed and built an Integrated Navigation Satellite/Inertial (INI) system and will participate in a test of this equipment for the Air Force Avionics Laboratory at the White Sands Missile Range test center. This study represents a continuation of an earlier INI flight test support study conducted by TASC. In this study the INI reference system error model is first revised to include the most current data on inertial system and beacon errors. Then an 18-state INI Kalman filter for integrating beacon receiver and inertial data is described. The filter is evaluated in a performance study which includes a comparison against an optimally integrated system using a complete 33-state reference error model. Special attention is focused on the conventional baroaltimeter damped vertical channel mechanization proposed by TRW and the problem of filter initialization. A component error budget is generated for the 18-state Kalman filter to identify major sources of system error and filter sensitivity to those errors. A brief review of the TRW flight test program is then presented. An 18-state INI Kalman filter is recommended for initial use in the flight tests and certain additions to the real time flight test data display and diagnostics are suggested.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 05, 1973
- Accession Number
- AD0913687
Entities
People
- Joseph A. D'appolito
- Kenneth J. Roy
Organizations
- TASC, Inc