A Working Group consisting of NLR, QinetiQ and ONERA constructed the ASTERA taxonomy for aeronautical R&T. This is a hierarchical taxonomy that builds upon existing European structuring efforts, such as the GARTEUR taxonomy and EUROCONTROL's ARDEP taxonomy.
The ASTERA taxonomy has been defined, reviewed and agreed upon by a considerable group of experts from different fields within the European aeronautics community. This has given the taxonomy a strong foundation. Therefore EASN uses and if necessary modifies this taxonomy in order to approach a classification of university activities in the field of aeronautics.
Open-loop Aircraft Stability Analysis
1. System identification - from empirical / analytical model parameter estimation, wind tunnel tests and flight tests.
2. Mathematical modelling - equations of motion, aerodynamics, mass properties and geometry, taking into account modelling errors and uncertainties).
3. Analytical analysis of stability and stability margins - including a sensitivity analysis to determine the most influential physical parameters.
4. Flight Tests - experimental analysis of stability and natural motion of the aircraft, including model validation, definition of suitable test manoeuvres, instrumentation.
Flight control system
1. System Identification (see 501).
2. Mathematical modelling (see 501, adding sensors and FSC systems models).
3. Definition of controller requirements and desired handling criteria.
4. Controller design - control theory (architecture, algorithms, robustness).
5. Thrust vectoring and integrated flight- and propulsion control.
6. Analytical controller analysis (stability and robustness, using linear models).
7. Controller analysis using desktop simulation.
8. Controller analysis using a flight simulator (pilot-in-the-loop, handling qualities).
9. Flight test analysis (see 501, including handling qualities).
10. Development of a more efficient, integrated design and analysis process for robust controllers.
Aircraft Performance Analysis
1. Mathematical modelling (3 DOF point mass model, equations of motion, environment, aerodynamics, engine and systems).
2. Analytical performance calculations.
3. Performance Analysis of complex and/or dangerous manoeuvres via non-linear desktop simulation.
4. Flight Tests - experimental performance (definition of suitable test manoeuvres, instrumentation and validation of model and analytical analysis results).
Optimisation of Aircraft Performance
1. Mathematical modelling (see 503).
2. Selection of optimisation method and strategy.
3. Mathematical Definition of performance objectives.
4. Implementation and application of efficient optimisation routines.
5. Verification of optimisation results in simulation and flight tests.
System Failure and Damage Analysis
1. Analysis of engine failure.
2. Design of fault-tolerant/ adaptive control systems (redundancy, fault detection and reconfiguration).
3. Analysis of FCS hardware failure (sensors, hydraulic systems, control surfaces).
4. Damage to the aircraft structure, resulting in altered aerodynamic properties.
Environmental Hazard Analysis
1. Take-off and landing in severe crosswind.
2. Windshear and microbursts (usually in combination with turbulence).
3. Turbulence/ gusts.
4. Terrain and airport conditions (terrain profile effects on radar altimeter, wind interference from buildings).
5. Wake vortex effects from other aircraft.
6. Icing conditions / heavy precipitation.