In order to fulfil all the MANOEUVRES goals, research and development activities are concerned with:
- Acoustic prediction
- Innovative measurement system development
- In-flight monitoring tool development
These activities are articulated into 5 technical work packages:
Acoustic prediction assesses the need of considering unsteady predictions methods for the evaluation of noise during manoeuvring flight. It examines the improvement of acoustic predictions derived by the availability of in-flight measurement of rotor AOA; it examines the sensitivity of noise predicted for given trajectories to trajectory data perturbations; it provides correlation between numerical predictions and experimental data provided by the GRC5 consortium, for given departure and approach flight trajectories.
Flapping measurement system preliminary studies provides the preliminary analysis, design and testing of selected solutions for in-flight rotor flapping measurements. Candidate technologies will be evaluated first on the basis of available literature and data, leading to the selection of two promising solutions. These two solutions will be implemented to assess their potential on a limited scale, undergoing a testing phase on suitable simplified laboratory rigs. The main result of this body of activities is the final selection of the solution that will be developed in the subsequent WP3. At the same time, this work package includes the initial activities in view of innovative developments in helicopter control laws exploiting the availability of in-flight rotor flapping measurements.
Flapping measurement system development. The system emerged as the fittest in the previous work package will be developed in detail and in full scale. First, in order to be extensively tested on a special laboratory rigs capable of replicating several aspects of the real operating conditions (a A109MKII helicopter iron-bird at DAER-PoliMI premises), and finally undergoing integration on board the helicopter manufacturer’s GTV to allow for verification, validation and final demonstration. Symmetrically, this work package includes the final body of activities in control law development, based on the results of the previous work package.
In-flight noise monitoring provides the development of suitable algorithmic tools for online noise estimation based on acoustic databases and in-flight flapping measures. It develops a convenient graphical interface (the PAI) in view of a possible integration on the helicopter cockpit, which will enable the pilot to assess the actual noise emitted; it integrates the PAI in the helicopter manufacturer’s flight simulator to allow testing and evaluation.
Management will take care of project management and coordination, administrative management, dissemination and exploitation, along the whole time span of the MANOEUVRES project