Application of pilot models to study trajectory based manoeuvres

A simulation environment that combines a trajectory generation scheme, an aeroelastic aircraft model and a pilot model is used to develop a methodology to study airframe loadings during trajectory-based manoeuvres. The manoeuvres are defined as resolutions with specified three dimensional position and time characterised by simultaneous changes in altitude, heading and speed. These are obtained by imposing different dynamic constraints within the generation scheme. Pilot models representative of pilot control behaviour are derived through a series of manual control experiments. Variations in pilot model parameters are then used to derive a pilot model with structured uncertainty. This was coupled with a flexible aircraft model to demonstrate the affects on pilot-vehicle-system frequency response due to changes in task and inter-subject differences. Aircraft accelerations during these manoeuvres are then compared with a stochastically derived loads envelope to assess effects of manual control on accelerations during the manoeuvres. It is envisioned that such a simulation framework and analysis can be fed back to the design process of the trajectory generation scheme to assure and enhance the operational safety for trajectory-based manoeuvres.

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