Multidisciplinary design optimization - some formal methods, framework requirements, and application to vehicle design

A vehicle is an engineering system whose successful design requires harmoni zation of a number of objectives and constraints that, in principle, can be modelled as a constrained optimization in the space of design variables. H owever, dimensionality of such optimization and the complexity and expense of the underlying analysis suggest a decomposition approach to enable concu rrent execution of smaller and more manageable tasks. In order to preserve the couplings that naturally occur among the elements of the whole problem, such optimization by various types of decomposition must include a degree of coordination at the system level. Multidisciplinary Design Optimization (MDO) is a body of methods and techniques for performing the above optimiza tion so as to balance the design considerations at the system and detail le vels. The paper is an overview of a few MDO methods selected for their appl icability to vehicle systems.