G. Looye, S. Hecker, T. Kier, C. Reschke

In this paper a model component library for developing multi-disciplinary aircraft flight dynamics models is presented, named FlightDynLib. This library is based on the object-oriented modelling language Modelica that has been designed for modelling of large scale multi-physics systems. The flight dynamics library allows for graphical construction of complex rigid as well as flexible aircraft dynamics models and is fully compatible with other available libraries for electronics, thermodynamics, control systems, etc. Object-oriented modelling allows physical objects and phenomena to be implemented one-to-one into software objects, since interconnections may be defined freely to directly represent the physical interactions (e.g. kinematic constraints, energy flows). Once a model is finished, dedicated symbolic algorithms collect, sort, and solve all model equations according to the selected inputs and outputs. From the solved equations efficient runtime code for model simulation is generated. This procedure may be used to obtain regular as well as inverse models, e.g. for trim computation or inversion-based control laws. Also dedicated representations for use in design of flight control laws can be generated, like symbolic parametric models for robustness analysis. In the paper the structure of the flight dynamics library and an example model of a flexible transport aircraft will be presented. The development of model components, construction of a model, and generation of simulation code will be demonstrated. The efficiency of the code results in short simulation times and allows for real-time applications.

International Forum on Aeroelasticity and Structural Dynamics, 2005, München

Conference Paper

englisch

21,0 x 29,7 cm, 15 Seiten

DGLR-Bericht, 2005, 2005-04, International Forum on Aeroelasticity and Structural Dynamics 2005; S.1-15; 2005; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

in getr. Zählung;

simulation, aeroelasticity, flight mechanics, models, object oriented, inverse

Bibliothek

2005