the simulation and integration of real-time wake vortex ... · need to explore ways and ideas for...

The Simulation and Integration of Real-Time Wake Vortex Turbulence in a Simulator Using Simulink Coder

RAeS Spring Flight Simulation Conference 2018Daniel Shinners, AXIS Flight Training Systems GmbH

AXIS

AXIS’ STANDPOINT

▸ New regulations present opportunities for new technology usage.

▸ Technology should not bring about negative training scenarios.

▸ Preparation for possible wake vortex training tasks in the future.

▸ Need to explore ways and ideas for repeatable and random UPRT training tasks.

▸ Realistic, ‘in-the-loop’ upset initiation that induces surprise and/or startle can add to robustness of pilot performance in upset recovery.

▸ Requirement: Proof of concept for flexible wake vortex turbulence module to be added to weather simulation processes.

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AXIS

OBJECTIVES

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Research

Modelling

Testing/Implementation

AXIS

WAKE VORTEX TURBULENCECONCEPTS

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Phases and their respective lengths of wake vortex turbulence

A pair of rolled-up trailing vortices of separation b0

Transport and decay outputs from analytical 2-phase decay calculation methods

AXIS

WAKE VORTEX SYSTEM APPROACH

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A set of computational gates used to calculate the wake transport and decay of an arriving aircraft. An individual gate has been enlarged to show the wake details.

AXIS

WAKE VORTEX SYSTEM APPROACH

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An example of a forced wake vortex encounter with accompanying pre-defined encounter geometries

AXIS

MATLAB SIMULINK MODELLINGSECONDARY MODULES

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Atmospheric module as well as the Follower/Leader modules

Auxiliary modules used for testing and visualisation purposes

AXIS

MATLAB SIMULINK MODELLINGPRIMARY MODULES

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AXIS

MODULE WAKE INITIATION

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Initial circulation strength and quasi-3D vortex/gate placement is calculated (left, blue). Discrete vortex particles are placed and calculated (left, red).

AXIS

MODULEWAKE VORTEX GATES

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An individual vortex gate (top), containing normalisation, time dependent and vortex module calculation blocks (middle). Vortex calculation modules accounting for decay and transport effects.

AXIS

SCENARIOOGE GATE

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SCENARIOOGE GATE (WIND GUSTS)

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SCENARIO NGE/IGE GATE

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MODULE ENCOUNTER

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Follower aircraft and wake tracking and positioning (red). Wake data acquisition (green). Wake data prepared for given encounter (blue).

AXIS

MODULEAIRCRAFT INTERACTION MODEL

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TESTING/RESULTS

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AXIS

INTEGRATION AND SIMULINK

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Integration:

▸ Converted and Integrated successfully into weather simulation process.

▸ Initial testing on an FTD completed.

Findings on Simulink:

▸ Strong development tool.

▸ Plugin structure streamlines testing and updates.

AXIS

USE CASES

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Now:

▸ Realistic ‘in-the-loop’ upset initiator.

Future:

▸ Traffic simulation add-on.

▸ Regulation-specific wake turbulence training tasks.

▸ Additional IOS tools for wake vortex severity criterion (Roll Control Ratio, Roll Moment Coefficient, etc).

AXIS

OUTLOOK

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Short Term:

▸ Pilot and simulator testing

▸ Upset initiations via wake vortex turbulence.

Longer Term:

▸ Enhanced IGE modelling

▸ 3D wake geometries.

▸ Multiple gate scenarios and 3D gate interpolation.

▸ Expansion of modelling for possible leader aircraft-based encounter scenarios.

▸ Increasing the realism of the traffic simulation with concurrent vortex generation of traffic aircraft.

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THANK YOU