Avionics-based GNSS integrity augmentation for uas mission planning and real-time trajectory optimisation

Roberto Sabatini, Terry Moore, Chris Hill

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

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.

Original languageBritish English
Title of host publication29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016
Pages1415-1431
Number of pages17
ISBN (Electronic)9781510834101
DOIs
StatePublished - 2016
Event29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016 - Portland, United States
Duration: 12 Sep 201616 Sep 2016

Publication series

Name29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016
Volume2

Conference

Conference29th International Technical Meeting of the Satellite Division of the Institute of Navigation, ION GNSS 2016
Country/TerritoryUnited States
CityPortland
Period12/09/1616/09/16

Keywords

  • Avionics based integrity augmentation
  • Caution and warning
  • Flight planning
  • GNSS augmentation
  • GNSS integrity
  • Trajectory optimisation
  • Unmanned aircraft systems

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