Abrasive seminar WPI tutorial 06 part2

Torbjorn

Informations

• Publié par: Iddo
• Nombre de lectures: 28
• Langue: English

Extrait

Basic Elements of Axiomatic
Design of Abrasive Processes
and Systems
Abrasive Process
Tutorial 9-12 Tuesday 7 November 2006
Prof. Christopher A. Brown
WPISyllabus
• Basics of Axiomatic Design
– Objectives and Rationale
– Independence and Information - Two axioms
– The domains and hierarchy of design
– The design matrix and axiom one
– Tolerances and axiom two
• Applications to abrasive processes
– Examples of couplingAxiomatic Design
Nam P. Suh Principles of Design 1990 and
Axiomatic Design 2001
• Formulated in the late 70s at MIT
• The practice of design based on axioms
became a scientific discipline in the sense
that there is a self-consistent, axiom-based
logic that leads to good solutions for design
problems. What are the Design Axioms?
• Something all good designs have in
common
• Cannot be proven – no exceptions have
been observedWhat is Engineering Design?
• the process of dreaming of things that never
were and asking - why not?
• conceiving, planning, analyzing, comparing, and
selecting components and systems that fulfill
some desired function.
• Functionally based and objective oriented.
Tasks:
Figure out what the functions are, then
figure out the best way to satisfy themEngineering Design is not all
about drawing or drafting.
• Engineering design includes the process
of developing concepts from general to
specific.
• This includes the origin and development
of the substantive content of design.
• Engineering design is a process of
creating value by thinkingWhat is thought?
…thought is all about semantics
Semantics is equivalent to capturing and exploiting
the compact structure of the world.
Eric Baum 2004 MIT press
Physics has a short list of laws that predicts many
phenomena
Axiomatic design has a short list of rules for
telling good designs from bad in the concept
phaseSemantics
…meanings, relationships, argument
structure, linking to syntax (integration of
elements into a meaningful entity)
• Develop an appropriate symbolic
representation of the design
• Manipulate the symbols according to the
rules to achieve the best designImportance of Axioms
• The discovery of the axioms created a
scientific discipline for design in the same
way that mechanics and thermodynamics
are scientific disciplines.
• This means that design can be taught as a
scientific discipline based on the axioms,
moving design beyond a field of study that
relies too heavily on experience.What is a good design?
• Fulfills functions, satisfying customer
needs reliably in the simplest, most
efficient way