Avionics-Based GNSS Integrity Augmentation for UAS mission planning and real-time trajectory optimisation

Sabatini, Roberto and Moore, Terry and Hill, Chris (2016) Avionics-Based GNSS Integrity Augmentation for UAS mission planning and real-time trajectory optimisation. In: 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2016), 12-16 Sep 2016, Portland, Oregon, USA.

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Abstract

This paper explores the potential of integrating Global Navigation Satellite System (GNSS) Avionics Based Integrity Augmentation (ABIA) functionalities in Unmanned Aerial Systems (UAS) to perform mission planning and real-time trajectory optimisation tasks. In case of mission planning, a pseudo-spectral optimization technique is adopted. For real-time trajectory optimisation a Direct Constrained Optimisation (DCO) method is employed. In this method the aircraft dynamics model is used to generate a number of feasible flight trajectories that also satisfy the GNSS integrity constraints. The feasible trajectories are calculated by initialising the aircraft dynamics model with a manoeuvre identification algorithm. The performance of the proposed GNSS integrity augmentation and trajectory optimisation algorithms was evaluated in representative simulation case studies. Additionally, the ABIA performance was compared with Space-Based and Ground-Based Augmentation Systems (SBAS/GBAS). Simulation results show that the proposed integration scheme is capable of performing safety-critical UAS tasks (CAT III precision approach, UAS Detect-and-Avoid, etc.) when GNSS is used as the primary source of navigation data. There is a synergy with SBAS/GBAS in providing suitable (predictive and reactive) integrity flags in all flight phases. Therefore, the integration of ABIA with SBAS/GBAS is a clear opportunity for future research towards the development of a Space-Ground-Avionics Augmentation Network (SGAAN) for UAS SAA and other safety-critical aviation applications.

Item Type: Conference or Workshop Item (Paper)
Additional Information: Published in: Proceedings of the 29th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2016)
Keywords: GNSS Integrity, GNSS Augmentation, Avionics Based Integrity Augmentation, Unmanned Aircraft Systems, Trajectory Optimisation, Flight Planning, Caution and Warning
Schools/Departments: University of Nottingham, UK > Faculty of Engineering
Depositing User: Eprints, Support
Date Deposited: 04 Jan 2017 11:56
Last Modified: 18 Mar 2017 16:39
URI: http://eprints.nottingham.ac.uk/id/eprint/39575

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