ARISTOTEL - AIRCRAFT and ROTORCRAFT PILOT COUPLINGS TOOLS AND TECHNIQUES FOR ALLEVIATION and DETECTION
Overview
Background & policy context:
The ARISTOTEL project was challenged with ensuring aircraft safety and aimed to reduce the aircraft and rotorcraft accidents caused by a particularly unfavourable category of phenomena: aircraft-pilot-couplings and rotorcraft-pilot-couplings (A/RPCs).
Generally, A/RPCs are defined as inadvertent, sustained aircraft oscillations which are a consequence of an abnormal joint enterprise between the aircraft and the pilot. Experiences at the start of this project showed that modern designs were being increasingly confronted with dangerous A/RPCs. The reason for this was that modern aircraft feature a significant level of automation in their flight-control-systems (FCS). The FCS are generally intended to relieve pilot workloads and allow operations in degraded weather and visibility conditions. Especially in the modern rotorcraft, there seemed to be embedded tendencies predisposing the FCS system towards dangerous RPCs. As the level of automation was likely to increase in future designs, extending to smaller aircraft and to different kinds of operations, the consequences of the pilot fighting the FCS system and inducing A/RPCs needed to be eradicated.
Objectives:
It was the goal of this project to develop the design tools and techniques needed to detect and alleviate the A/RPC problems.
Methodology:
The end products of the project were to be:
- Advanced vehicle-pilot-FCS simulation models for rigid body and aero servo elastic A/RPC analysis;
- A/RPC design guidelines and criteria;
- protocols and guidelines for A/RPC flight simulator training.
All results were to be directly usable by the aerospace industry in the design process for improving flight safety. The project would contribute in this sense to:
- the minimization of the factors that lead to pilot loss of control resulting in increased enhancement of the European aircraft safety and;
- would strengthen the European Aeronautics Industry competitiveness in their time- and cost-effective design tools.
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