Conceptual Design of an Aerospace Vehicle Controller Using Axiomatic Theory

摘要

AEROSPACE systems are extremely involved with complexninterdependencies between the attendant subsystems, makingntheir design and engineering quite challenging. Requirements onnperformance, efficiency, economy, environmental effects, and issuesnof safety, reliability, ease of maintenance, and other factors, arenusually interlinked and may often be in mutual conflict. This has lednto the adoption of a systems engineering perspective to many aero-nspace design problems [1,2], and the development of processes,ntools, and methods broadly classed as system of systems engineeringn[3]. Yet, the design and development of aerospace systems, like anynother system design, must follow the natural course of ideate,nanalyze, check, and revise. The ideation phase is a creative processnwhere the designer must make a coherent problem statement thatnclearly captures the design requirements, and then come up with onenor more concepts that appear to meet the stated requirements. Eachnconceptmust be realized by one ormore designs (for example, vortexnlift conceptmay be realized by a canard or a strakeor a crankeddelta ornany other design), each of which must then be analyzed andnquantitative measures obtained that enable one to judge whether thendesign solves thegivenproblemand, if so,which among the designs isnthe best.Almost every device available to the designermay be seen tonbe a realization (inverse problem), analysis (modeling & simulation)nor a comparison (optimization) tool, with hardly any tool, if at all, tonhelp the designer in the conception phase. This is of concern,nespecially when the concept is innovative, not merely an improve-nment, but a radical departure from existing conceptual approaches tonthe problem.Admittedly, the conception process is highly subjective,ndepending on the creative powers of the designer and his/her ability tonintegrate knowledge in diverse disciplines. Yet, a systematic basis tonhelp the designer eliminate faulty concepts and narrowdown the fieldnto good designs will be of immense value in curtailing developmentntime and cost, and in yielding a superior product.