HYBRID MODELLING FOR FULL MISSION SIMULATION

Resumo

© 2021 32nd Congress of the International Council of the Aeronautical Sciences, ICAS 2021. All rights reserved.Aircraft conceptual design has mostly been characterized by sizing by the use of rather simple analytical models. Such models serve a purpose since they can be easily be manipulated for e.g. trade studies to see the effect of requirements on the design parameters and general performance of the aircraft. However, there is a trend to involve more advanced calculations, e.g. more advanced aerodynamics calculations and flight dynamics analysis, already at the conceptual design, in order to further reduce uncertainty. In the same way, it could be argued that more detailed analysis of behaviour of the aircraft in a mission should be useful. We propose the simulation of hybrid systems in the framework of transmission line modelling, TLM. We extend an existing continuous time methodology, and adopt UML Activity Diagram and Petri nets for the discrete event dynamics, to describe complex behaviour. This allows for full system simulation of a mission where a more accurate evaluation of mission performance can be obtained. In this paper the methodology is outlined and demonstrated on a UAV mission application.

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