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Analytical Target Cascading (ATC) is a product development tool that computes component design specifications such that the final system design is consistent and meets design targets. ATC is useful for complex product design that must be approached by decomposition, and facilitates concurrent design activities. While ATC has been applied successfully to automotive design, this article introduces the application of ATC to aircraft design, and discusses how it can be congruent with current design practice. Analytical Target Cascading (ATC) is a multi-level optimization methodology for coordinating the design and development of complex systems.1, 2 ATC was developed to assist in early product development stages, and is intended for design problems with a hierarchical structure. An ATC approach to aircraft design is presented in this article, and a detailed example for aircraft design over multiple regimes is put forward. In this example (and other complex system design problems), difficulties are encountered when attempting to solve with an all-in-one (AiO) approach. This example considers the design of an aircraft for multiple flight regimes. A Boeing 747-400 design was optimized over three mission segments—take-off, cruise, and second segment climb (SSC)—in order to assure satisfactory performance under typical B747 operating conditions. This approach can be viewed as designing a separate aircraft that is ideal for each regime, and then coordinating these designs toward a single aircraft design that performs well in all regimes. This is similar to a product family design approach, except that complete commonality is enforced. Future work will involve the design of separate aircraft for distinct missions using ATC. The aircraft analysis model used for this design problem employs purely algebraic relations, yet captures important relations and interactions.
Tags : boeing 747 400, flight regimes, distinct missions, level optimization, algebraic relations, concurrent design, aircraft design, analysis model, component design, target, b747, automotive design, design approach, satisfactory performance, current design
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