Abstract: A device for maintaining reliability of positioning of a vehicle irrespective of vulnerability of satellite data, including an inertial measurement unit, a satellite data receiver, a main Kalman filter configured to calculate navigation data corrections by continuous hybridization of satellite data and of non-satellite data, and, additionally, a bank of Kalman sub-filters in parallel, each Kalman sub-filter being configured to calculate navigation data corrections by intermittent hybridization, according to a predetermined recalibration frequency, and, outside the implementation of the intermittent hybridization, to calculate navigation data corrections based solely on the non-satellite data.

Abstract: A navigation and positioning device including an inertial measurement unit, a receiver for receiving GNSS satellite positioning measurements, a closed-loop primary Kalman filter configured to compute navigation data corrections by hybridizing satellite data and non-satellite data, as well as a bank of N closed-loop secondary Kalman filters, each configured to compute navigation data corrections based solely on the non-satellite positioning data delivered at least by the inertial measurement unit, each secondary Kalman filter of index i, where 1?i?N, being able to reconfigure itself to the primary Kalman filter at a time (i?1)T from the start of navigation of the vehicle, and then periodically at a period N×T, T being a predetermined duration.

Abstract: The invention pertains to an inertial platform comprising a housing and a suspended inertial sensor assembly (ECIS) furnished with rigidly inter-linked motion sensors, characterized in that it comprises: a first internal suspension assembly inside the said sensor assembly, between a rigid mechanical support on which are mounted the said sensors and an intermediate mechanical piece, having small swing comprising a first number N1, at least equal to four, of suspension pads mounted fixedly on the said suspended sensor assembly; and a second external suspension assembly outside the said sensor assembly, between the said intermediate piece, forming part of the suspended assembly and the said housing, the said second external suspension assembly having large swing, comprising a second number N2, at least equal to four, of suspension pads linked rigidly to the said housing, and not forming part of the suspended sensor assembly.