Abstract
An aircraft design and its flight trajectory problem should be formulated simultaneously when an exact flight mission is determined or an extremely high-performance level is required. This article presents a block diagonal sequential quadratic programming approach by introducing interface variables between the two problems to efficiently solve simultaneous optimization problems. As numerical examples, the design of a sailplane for a flight distance competition is studied. The need of simultaneous optimization will be demonstrated by comparing a conventional design process; i.e., a lift-drag ratio maximization approach.
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