The Design Process 122808 L 1 Crs Ovrvw

Class 2 outline o Background The Design Process o Ref: Salt Ch 1 and

Background o “Throughout history, engineering has been an integral part of human activity” n

Background (2) o Today n n n o The transistor The IC Space exploration

Background (3) o Tomorrow? ? ? n n A colony on the Moon A

The Engineering Profession o Engineering – (Webster) n 1. a) the science concerned with

Engineering Definition (ABET) o ABET definition of enigneering n o Engineering is the profession

Engineering Definition (Wikipedia) o Engineering is the discipline, art, skill and profession of acquiring

The Design Engineer o In design there are 3 stakeholders n n n o

The General Engineering Process o o o The process has a structured flow. For

Example of the desing process o o Cars are hard to start in cold

A Problem to be solved o o Employer has posts in parking lot with

Problem statement o Formally state the problem to be solved n Design a device

Now synthesize a solution o o Textbook goes through 3 possible solutions Can you

Design Methodology o o Different approaches in applying the engineering process. Feedback vs. no

Example use of Method o Describe what occurs in each step for the following

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Background o “Throughout history, engineering has been an integral part of human activity” n n o Tools – knives, weapons Others – class input “Engineering is linked to technology” n n n Stone age – stone spearhead, … Bronze age – Bronze knives and tools Military technology has played a significant part in technology advances. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 3

Background (2) o Today n n n o The transistor The IC Space exploration The engineering profession was probably born of the industrial revolution in England. n n 1 st engineering school – Woolwich 1740 1 st professional organization – Institute of Civil Engineers – London 1818 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 4

Background (3) o Tomorrow? ? ? n n A colony on the Moon A colony on Mars (actually in the planning) o o n Habitation modules Working Modules Gardening Modules Plans to oxygenate the atmosphere What else? ? ? 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 5

The Engineering Profession o Engineering – (Webster) n 1. a) the science concerned with putting scientific knowledge to practical uses, divided into different branches, as civil, electrical, mechanical, or chemical engineering. b) the planning, design, construction, or management of machinery, roads, bridges, buildings, etc. 2) the art of maneuvering or managing. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 6

Engineering Definition (ABET) o ABET definition of enigneering n o Engineering is the profession in which knowledge of the mathematical and natural sciences gained by study, experience, and practice is applied with judgment to develop ways to utilize, economically, the materials and forces for the benefit of mankind. “It is the application of knowledge to solving problems that is at the heart of engineering. ” 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 7

Engineering Definition (Wikipedia) o Engineering is the discipline, art, skill and profession of acquiring and applying scientific, mathematical, economic, social, and practical knowledge, in order to design and build structures, machines, devices, systems, materials and processes that safely realize improvements to the lives of people. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 8

The Design Engineer o In design there are 3 stakeholders n n n o The person needing the design done, i. e. , the person who encounter a problem and needs a solution. The person who will work the problem to produce “a” solution. The person who takes the design and implements it. Customer – Engineer – Manufacturer 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 9

The General Engineering Process o o o The process has a structured flow. For complex problems the diagram has multiple instances of the process for each sub-problem. For each solution developed there is a cost of $xx. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 10

Example of the desing process o o Cars are hard to start in cold weather climates, for example, Alaska. Solution – Block heaters that keep the engine warm so it will start easily. Heater plugs into 110 V outlet. n n Done through heating the engine oil Done by heating the coolant and keeping the coolant warm and slowing moving. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 11

A Problem to be solved o o Employer has posts in parking lot with outlets so employees can plug in their car when they arrive at work. Problem – sometimes power goes out as the breaker for a pole gets tripped. You know the result. How to solve the problem – class input!!! 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 12

Problem statement o Formally state the problem to be solved n Design a device to be integrated with the pole or an extension cord that will detect the difference between 0. 5 and 3. 0 amperes of current and clearly present the binary conclusion to the user. The device, the power line indicator, must not consume more than 5 watts and cost less than $6. 00. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 13

Example use of Method o Describe what occurs in each step for the following “problems” n n Select an alphanumeric display suitable for use in an outdoor product where the display must be readable in all conditions. Add a navigation system to a Ford Escape. 12/28/08 - L 1 Crs Ovrvw Copyright 2006 - Joanne De. Groat, ECE, OSU 16