In this work the observability of an Inertial Navigation System (INS) during In-Flight Alignment (IFA) is investigated. A systematic approach to the observability analysis of a piece-wise constant system is presented and its use is justified mathematically. As a tool for the investigation a Stepped Observability Matrix (SOM) is constructed and a corresponding Stepped Space is defined. The INS error model is transformed into the Stepped Space during a specially chosen IFA trajectory and a full observability is carried out. The results of the mathematical analysis are checked against the results of covariance simulation and a full agreement is found between the two. Finally, the practical implications of this analysis are outlined.
Observability analysis of inertial navigation systems during in-flight alignment
AIAA Guidance, Navigation and Control Conference ; 1988 ; Minneapolis, MN, United States
1988-01-01
Conference paper
No indication
English
Observability studies of inertial navigation systems
AIAA | 1989
|Observability studies of inertial navigation systems
NTRS | 1989
|