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BULETINUL INSTITUTULUI POLITEHNIC DIN IAŞI
Publicat de
Universitatea Tehnică „Gheorghe Asachi” din Iaşi
Tomul LVI (LX), Fasc. 2, 2010
Secţia
CONSTRUCŢII DE MAŞINI
ON THE PATTERN OF THE DESIGN MATRIX IN
REDUNDANT DESIGN SOLUTIONS
BY
ANTÓNIO M. GONÇALVES-COELHO 1 , GABRIELA NEŞTIAN 2 ,
and ANTÓNIO MOURÃO 1
Abstract. Axiomatic Design was created with the aim of building a
systematic model for engineering education and practice, taking into
account the initial hypothesis that there are fundamental principles that
govern good design practice. According to this design theory, the design
solutions can be classified as uncoupled, decoupled or coupled, depending
on the way their design matrices are populated. Uncoupled solutions are the
best, decoupled solutions are acceptable, and coupled solutions are poor
design and should be avoided. Redundant designs make up a specific class
of design solutions, in which the number of functional requirements is
lesser than the number of design parameters. This paper discusses how the
design matrix could be populated, so that a redundant design could be either
uncoupled or decoupled.
Keywords: Axiomatic Design, Design Matrix, Redundant Design, Ideal
Design.
1. Introduction
Axiomatic Design (AD) was created in the late 1970’s by Nam P. Suh with
the aim of building a systematic model for engineering education and practice
under the initial hypothesis that there are fundamental principles that govern
good design practice [1].
According to AD, any “design object” — being it a product, a process or any
other technical system — can be described by a vector in each one of four
design domains (see Fig. 1). The design process starts at the customer domain
with the definition of the customer needs (CNs). Mapping between the customer