Systems engineering is an organized way to design and develop systems, but the initial system design concepts are usually seen as the products of unexplained but highly creative intuition. Axiomatic design is a mathematical approach to produce and compare system architectures. The two axioms are:- Maintain the independence of the functional requirements.- Minimize the information content (or complexity) of the design. The first axiom generates good system design structures and the second axiom ranks them. The closed system human life support architecture now implemented in the International Space Station has been essentially unchanged for fifty years. In contrast, brief missions such as Apollo and Shuttle have used open loop life support. As mission length increases, greater system closure and increased recycling become more cost-effective.Closure can be gradually increased, first recycling humidity condensate, then hygiene wastewater, urine, carbon dioxide, and water recovery brine. A long term space station or planetary base could implement nearly full closure, including food production. Dynamic systems theory supports the axioms by showing that fewer requirements, fewer subsystems, and fewer interconnections all increase system stability. If systems are too complex and interconnected, reliability is reduced and operations and maintenance become more difficult. Using axiomatic design shows how the mission duration and other requirements determine the best life support system design including the degree of closure.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Axiomatic Design of Space Life Support Systems


    Contributors:

    Conference:

    International Conference on Environmental Systems ; 2017 ; Charleston, SC, United States


    Publication date :

    2017-07-16


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Axiomatic Design of Mechanical Systems

    Suh, N.P. | Online Contents | 1995


    Axiomatic design of automotive suspension systems

    Bae, S. / Lee, J.M. / Chu, C.N. | Tema Archive | 2002


    Axiomatic Design Quality

    Haik, Basem | SAE Technical Papers | 2006


    Axiomatic design quality

    Haik,B. / Six Sigma Professionals,US | Automotive engineering | 2006


    Axiomatic design for reliability

    Arcidiacono,C. / Univ.di Firenze,IT | Automotive engineering | 2000