Fixed-Wing Aeroplane (Sub)System Design Method: From Abstract to Material Architectures

Abstract

This paper presents development of an innovative method for aeroplane system architecture design, based on the principles of causal networks. In light of the environmental crisis that the world faces, it is argued that the new design method should be motivated by sustainability values in the first place. This implies the necessity for a method that is evolvable, as well as for the design artefact to include an awareness of its contribution to dynamics of the higher-level systems within which it is embedded. To that end, the method is based on gradual and iterative development of an initial abstract object which represents relevant system functions over a designated life cycle. The architecture design procedure consists in evolving this abstract object by means of the pre-defined design rules towards a material architectures that satisfies multiple requirements and constraints for multiple actors. The design rules at hand represent a combination of quantitative methods such as first principles of physics and qualitative principles of systems engineering. In complement to system characteristics, rigorous book-keeping of matter and energy interfaces with the object’s surroundings is at the core of the method. To test the developed principles with the elementary method development at hand, a propulsive system architecture case study is elaborated. The case study represents a simple case of a short-medium range engine architecture designed to respond to operating requirements, whose resulting performance is book-kept and evaluated in a much broader context than the operation (in-flight performance), for which engines are commonly preliminary-designed.