Title :
Observability analysis of piece-wise constant systems. II. Application to inertial navigation in-flight alignment [military applications]
Author :
Goshen-Meskin, D. ; Bar-Itzhack, I.Y.
Author_Institution :
MALAT-Israel Aircraft Ind., Ben Gurion Int. Airport, Israel
fDate :
10/1/1992 12:00:00 AM
Abstract :
For pt.I see ibid., vol.28, no.4, p.1056-67, Oct. 1992. The method of analyzing the observability of time-varying linear systems as piecewise constant systems (PWCS) is applied to the analysis of in-flight alignment (IFA) of inertial navigation systems (INS) whose estimability is known to be enhanced by maneuvers. The validity of this approach to the analysis of IFA is proven. The analysis lays the theoretical background to, and clearly demonstrates the observability enhancement of, IFA. The analytic conclusions are confirmed by covariance simulations. Although INS IFA was handled to various degrees in the past, a comprehensive control theoretic approach to the problem is introduced. The analysis yields practical conclusions and a procedure previously unknown
Keywords :
aerospace control; control system analysis; inertial navigation; linear systems; military systems; observability; state estimation; time-varying systems; INS; Kalman filters; covariance simulations; dumping; error model; estimability; in-flight alignment; inertial navigation; observability; piece-wise constant systems; state estimation; time-varying linear systems; velocity error; weapons; Acceleration; Aerospace industry; Aircraft navigation; Analytical models; Inertial navigation; Linear systems; Observability; Time varying systems; Vehicles; Weapons;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
