摘要 :
The aerospace industry has set ambitious targets to meet environmental goals while under pressure to develop novel and optimized aircraft configurations effectively. Multidisciplinary Design Analysis and Optimization (MDAO) are in...
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The aerospace industry has set ambitious targets to meet environmental goals while under pressure to develop novel and optimized aircraft configurations effectively. Multidisciplinary Design Analysis and Optimization (MDAO) are increasingly used to optimize aircraft and their systems. Model-Based System Engineering (MBSE) methods show the potential to make the design process more effective, integrate new disciplines, and capture complex certification constraints. Today, MBSE and MDAO are not connected; different methods and tools are used, not harvesting the full potential of both approaches. This paper discusses the need for improved system architecting in the aircraft conceptual design process and introduces a framework to use MBSE in connection to MDAO. In this framework, the MBSE environment compiles system information within a system architecture specification, acting as the backbone and visual support for each stage in the systems architecting process. MDAO is used for the evaluation of system architectures. This paper presents a case study as part of the Ell-funded AGILE4.0, in which the specific link between model specification in the MBSE tool Capella and a system-level MDAO workflow is explored. Overall, this paper presents a practical contribution to linking MBSE and MDAO and paves the way for better integration of MBSE into the aircraft design process, thereby enabling MBSE implementation from conceptual design onwards. Furthermore, this will enable more detailed system analysis, such as safety analysis, starting in conceptual design, based on architecture models.
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摘要 :
The aviation industry is turning to novel aircraft concepts and systems to meet challenging environmental targets. New concepts such as hybrid and distributed electric propulsion add increasing complexity to aircraft system archit...
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The aviation industry is turning to novel aircraft concepts and systems to meet challenging environmental targets. New concepts such as hybrid and distributed electric propulsion add increasing complexity to aircraft system architectures. The systems architecting process must thus be modified to identify promising architectures early in the design process. Safety assessment plays a major role in the certification of aircraft systems and thus must be adapted to evaluate novel architectures in early design stages. At the same time, model-based systems engineering (MBSE) is used increasingly for system specification. The safety assessment process is following a similar trend, the so-called Model-Based Safety Assessment (MBSA), which is promising for complex systems architectures. This paper presents how a model-based specification can be used to conduct a Functional Hazard Analysis (FHA), a first step to integrating MBSE with the safety assessment process. A practical framework using the Capella tool is presented. An aircraft brake system example illustrates the effectiveness of the presented methodology using a variety of models and diagrams. Overall, the presented paper improves current MBSE and safety assessment practices for more effective development of future aircraft.
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