Abstract
The current challenges facing the aerospace domain require unconventional solutions, which could be sought in new configurations of future aircraft and spacecraft. The choice of optimal concepts requires the consideration of a significant amount of competing engineering solutions and takes place under conditions of uncertainty. Such a problem can be addressed by enhancing existing methods for analysis and synthesis solutions, such as the Advanced Morphological Approach (AMA). It uses morphological analysis to provide a more exhaustive overview of possible problem solutions, relies on expert evaluations of alternative technological options and applies clustering to the solution space. Although an intuitive method for structured concept generation, the AMA exposes the need for more robust problem structuring, improved objectivity of options evaluation and accounting for uncertainties. The current article suggests ways to overcome these challenges and their possible integration in the process. In particular, the integration of fuzzy sets is proposed to model uncertainties during the evaluation of technological options by the experts. The Fuzzy Analytical Hierarchy Process is adapted for integration into the AMA and for the conceptual design of aerospace vehicles.
Highlights
The most important stage in the design of innovative aircraft systems is the concept design phase [1]
Since the current paper aims to outline the global methodology of the Fuzzy AHP (FAHP) integration into the Advanced Morphological Approach (AMA), the rest of the parameters will be left to be set in a further, more detailed definition of the method
The (a, b, c) format denotes the significant points of a triangular fuzzy number, where b is the peak with full membership of 1 and a and c are the limits of the number with membership 0 and are connected linearly to b
Summary
The most important stage in the design of innovative aircraft systems is the concept design phase [1]. Mistakes at this stage might lead to significant increases in cost and lead time and could have a fatal impact on the project. Preliminary design approaches are based on development trends derived from databases and statistics [2]. This is not the case when aiming to develop innovative aircraft configurations, since breakthrough technologies lack experimental and statistical data.
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