Prediction and real-time simulation of vibratory loads applied to the AH-64 helicopter
|Lead Researcher:||ir. Ivan Miletović|
In helicopter flight, vibrations arising at the pilot station from loads generated by the main rotor constitute an important cue to pilots. As such, the inclusion of vibrations in real-time, pilot-in-the-loop helicopter flight simulation is of great interest. Physics-based modelling and simulation of vibratory loads, however, is a notoriously complex problem in the field of rotorcraft dynamics. Results obtained from even the most sophisticated analyses often exhibit poor correlation with flight test data across the operational flight envelope. A project is therefore organised in cooperation with Desdemona B.V. to develop a more pragmatic approach for the prediction of vibratory loads, applied specifically to the AH-64 helicopter.
The goal of this project is to develop a method, based on regression analysis performed on flight test data and using pilot-in-the-loop-experiments, for the prediction and real-time simulation of vibratory loads applied to the AH-64 helicopter. The project is conducted at Desdemona B.V in Soesterberg, the Netherlands and is to be completed in a nominal time of 9 months.
The following activities are envisioned:
- Perform literature study on vibratory loads in rotorcraft and characterise loads as a function of forward flight speed.
- Collect flight test data available in open literature (e.g., from UH-60/SH-60 research) and identify, using multiple regression or similar techniques, a model of vibratory loads.
- Adapt the model for application to the AH-64 helicopter by appropriate “tuning” of model parameters. This process is to be supported using pilot-in-the-loop experiments performed in the Desdemona simulator.
- Write a scientific paper about the outcomes of the project.