ADAVES

Advanced avionics equipment simulation

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 Obiettivo del progetto (Objective)

'The objective of the project is to develop a high fidelity and accuracy GPS system simulation, capable of being seemly integrated in Green Regional Aircraft (GRA) flight simulator.

The development of a green FMS is an essential factor for integrating green technologies in GRA simulator and for achieving the following Clean Sky environmental goals. • 50% reduction of CO2 emissions • 80% reduction of NOx (nitrogen oxide) emissions • 50% reduction of external noise

To support the green FMS system development, a GPS simulator shall be developed taking into consideration that navigation scenarios presented by both NextGen (EUA) and SESAR (UE) Master Plans.

These Roadmaps present the FMS increasingly relying on GNSS systems, in particular the current SESAR 2020 Navigation roadmap considers the following scenario: • Primary aircraft positioning means will be satellite based for all flight phases; • Positioning is expected to rely on a minimum of two dual frequency satellite constellations (Galileo, GPS L1/L5 and potentially other constellations, assuming interoperability) and augmentation as required: • Aircraft based augmentation (ABAS) such as INS and multiple GNSS processing receiver; • Satellite based augmentation (SBAS) such as EGNOS and WAAS.

And Beyond 2020 : • The availability of other constellations enables increased accuracy and availability. Multi constellation receivers are able to exploit available constellations/satellites (e.g. China, Russia), • Ground based augmentation (GBAS) for Cat II/III approach and landing with backup provided by ILS/MLS

As part of this project a simulator infrastructure shall be implemented with a modular architecture that can be further extended to cope environment presented above and that shall provide a realistic GPS simulation infrastructure. Being this high level of realism achieved through the use of EGNOS data for the validation and fine tuning of the several GNSS signals errors sources contributions.'

Introduzione (Teaser)

To cope with the continuous increase in the number of flights, satellite navigation receivers are installed in aircraft to assist pilots from taking off to landing. An EU-funded project provided new technology for the adoption of satellite navigation in regional flights as well.ADAVES provides an end-to-end realistic simulation infrastructure, makes available simulation scenarios with large number of aircrafts (different GPS Receivers) all within the same consistent GNSS environment, however considering different local effects in each Receiver.

Descrizione progetto (Article)

The development of the Global Navigation Satellite System (GNSS) has allowed the automation of in-flight tasks as well as the improvement of methodologies for determining the optimal flight path. Even when weather conditions change, pilots can determine their position reliably and select alternatives paths for accessing busy airports to make substantial savings in time and fuel.

The objective of the 'Advanced avionics equipment simulation' (ADAVES) project was to develop a high fidelity and accuracy GPS system simulation, capable of being seemly integrated in Green Regional Aircraft (GRA) flight simulator. ADAVES project main goal is to support the green FMS (Flying Model Simulator) system development, through the development of a GNSS Receiver Simulator and related GNSS Constellation Simulator.

The interactive Green Regional Aircraft (GRA) flight simulator has been developed to assess the benefits in terms of environmental impact of a new flight management system. The researchers' part of the work covered the design of a simulated satellite system, which will broadcast a signal used to pinpoint the aircraft position.

Both ADAVES Receiver and Constellation simulators will enable to infer the available GNSS (even considering the set of error introduced by the different local effects and associated mitigations) will be an added value in the green FMS goal.

The Constellation Simulator is responsible for simulating the GPS constellation accurately. It produces navigation messages for each satellite in the constellation and broadcast them to the running Receiver Simulators.

The Receiver Simulator(s) performs a realistic simulation of multiple GPS receivers while considering sources of errors (such as, signal obstruction due to terrain geography, scintillation effects, noise power, antenna pattern, relativistic, satellite clock, Doppler shift, troposphere and ionosphere delay, multipath effect) and also performing error attenuation, as a real GPS receiver would. The user can also trigger the simulation of failures and malfunctions.

The Receiver Simulator computes its navigation solution containing the GPS time, position, velocity, track angle, integrity limit, figure of merit, dilution of precision, RAIM and PRAIM data, providing it to the FMS.

By the end of the project, the positioning system simulator was created and successfully tested. Finally, the ADAVES simulator was integrated into the final configuration of the GRA flight simulator for testing, which was scheduled to begin in autumn 2013. Flight simulations will focus on meeting the Clean Sky target of reducing carbon dioxide (CO2) emissions as well as noise.