MONITORING AND MULTILEVEL PROTECTION OF THE INTEGRITY OF TIGHTLY-COUPLED NAVIGATION SYSTEMS FOR MANEUVERABLE AIRCRAFT
This paper is devoted to the problem of maintaining the integrity of navigation systems (NS’s) of maneuverable aircraft under real noise environment. The proposed solution of this problem relies on the potentialities of hardware and algorithmic redundancy when constructing the loops for primary and secondary signal processing. Such a redundancy permits one to improve the reliability of estimation of NS state parameters under uncertainty and also to ensure the mutual support of NS’s if critical situations occur. Hardware redundancy is assumed to be attained by the integration, into a unified navigation-time space, of air data, inertial, and satellite measuring channels. It is also assumed that algorithmic redundancy is achieved by the integration, into a single information space, of procedures for adaptive robust signal processing and combined procedures for detecting and counteracting outliers and failures, too. The results of experimental studies are given, which corroborate the effectiveness of applying the proposed approach in practice.