Using Design Equations for Design Analysis and Synthesis

Abstract

Design Equations were used for anthropometric design of a truck cab. Functional Requirements were first formulated. Design Parameters were then selected with the purpose of creating an uncoupled design. Design equations were formulated, where couplings between functional requirements and design parameters were investigated. Ideally there should be a one-to-one correspondence between functional requirements and design parameters. This can be achieved if the design parameters are selected in a strategic fashion so that couplings are minimized. The nature of the design equations will inform the designer of the type of coupling: coupled design, semi-coupled design or uncoupled design. Design parameters that lead to couplings are replaced by other design parameters that create an uncoupled design. The design equations therefore serve to analyze a design, and by understanding the couplings it is feasible to synthesize a better solution. We call this method DESA — Design Equations for Systems Design. It has broad implications for design.