Abstract
This paper aims at presenting an integrated navigation algorithm designed for estimating the navigation state of the STRATOFLY vehicle (LAPCAT–MR3). STRATOFLY project has been funded by the European Commission, under the framework of Horizon 2020 plan, with the aim of assessing the potential of high–speed transport vehicle. The complex interaction between elements of an air-breathing hypersonic vehicle represents a new paradigm in aircraft design. In particular, one of the needs for early GNC analysis in the case of LAPCAT–MR3 vehicle is the assessment of navigation performance over the reference trajectory. The navigation algorithm presented in this paper is based on an augmented state EKF data fusion algorithm exploiting inertial measurements provided by gyroscopes and accelerometers, heading estimates provided by a magnetometer and satellite-based measurements provided by a spaceborne GNSS receiver, considering GPS, GLONASS and GALILEO constellations.
Highlights
This paper aims at introducing a state estimator for the STRATOFLY vehicle
This work was aimed at investigating the performance of an INS/GNSS integrated navigation algorithm for a hypersonic aircraft flying in the stratosphere
Main issues were related to the absence of ground navigation aids in the stratosphere, the nearly polar trajectory and COCOM limits for GNSS receivers
Summary
Resulted from multiple optimization iterations of the previous LAPCAT–MR1 [1,2,3,4,5], this vehicle is a hypersonic cruiser concept for civil passenger transports flying at Mach 8 and 30 km altitude. Preliminary route planning for the LAPCAT–MR2.4 assumes that supersonic flight is only possible over regions of very low population density (oceans and Earth poles). The trajectory, depicted, is divided into four different parts, i.e. flight phases that are: Initial state: the flight plan assumes Brussels airport as departure point, at 0 km altitude with a departure velocity of 150 m/s to ensure lift off. The initial flight path angle is zero and the heading is -15deg, i.e. heading slightly west to pass in between the British Islands and Scandinavia
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