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Engineering Design Process

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Sci Files segment explaining the Engineering Design Process, Iteration, and the different steps in the process to design a new product.

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I would never suggest breaking a law, but it looks like we will have to average about 227 miles per hour to make it to the ceremony on time. 00:00:00
I think you should check your numbers, Jacob. We should be fine. Remember, we have moved. 00:00:09
Well, Jacob does have a point. If we sit in traffic for very long, the car becomes useless. 00:00:14
What do you mean? 00:00:19
Well, no car can travel safely at 227 miles per hour. 00:00:20
Race cars can. 00:00:24
But not on the highway. 00:00:25
Good point, Catherine. Eventually you will discover certain limitations to any technology. 00:00:26
Look at all the different forms of transportation that have been invented over the years. 00:00:31
For example, hot air balloons, helicopters, flying cars, my own personal hovercraft, skateboards, pogo sticks. 00:00:34
Wait a minute, Dr. D. Did you say your own personal hovercraft? 00:00:41
That's right. 00:00:45
Where did you buy a hovercraft? 00:00:46
I didn't buy it. I designed it and built it. 00:00:47
Wow, Dr. D. How did you build a hovercraft? 00:00:50
And did it take long to build? 00:00:52
Slow down, kids. Let me start by having you look at the device on the back seat. It's called a marble twister. 00:00:53
This doesn't look like a hovercraft. 00:00:58
Yeah, but it's pretty cool. What does it do? 00:01:01
Put a marble on the track at the top and tell me what you see. 00:01:04
It's going around in circles and gradually getting closer to the bottom. 00:01:11
Very good. The marble twister illustrates iteration. 00:01:15
What did you say? 00:01:18
Iteration. It's part of the engineering design process. It's like a cycle. 00:01:19
Wow, we've seen lots of cycles before, like the rock cycle and the water cycle. 00:01:23
In this cycle, you develop a plan for your project, design and build a model, test and evaluate the model, 00:01:27
and then begin the cycle again by redesigning the model based upon your test results. 00:01:33
I get it. Then you test the redesigned model, evaluate the results, and redesign the model again. 00:01:37
That's just like the marbles. Each time you go around the cycle, you get closer to a finished product. 00:01:42
Just like each time around the circle, the marbles get closer to the bottom. 00:01:47
How many times do you need to go through the cycle? 00:01:51
Well, the product is never perfect, so you just have to decide when it's close enough. 00:01:53
This engineering design process sounds an awful lot like the scientific method, 00:01:57
except the step about identifying or recognizing a problem isn't included. 00:02:01
Actually, I just hadn't gotten to the first steps yet. 00:02:05
In the engineering design process, the first step is called identifying a need or want. 00:02:08
Then you brainstorm ideas, like we did in the invention process, in the case of the Rice invention. 00:02:12
Very good. The engineering design process is very similar to the invention process. 00:02:16
After brainstorming, the next step is select a solution and do research. 00:02:21
And then you develop a plan. 00:02:25
That's it, and the cycle begins. 00:02:26
Whenever you are facing a design challenge, the process we have just discussed will be very helpful. 00:02:28
I can't imagine a more difficult challenge than this traffic jam. 00:02:33
Trust me, Jacob, there have been bigger challenges. 00:02:37
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Idioma/s:
en
Niveles educativos:
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      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
278
Fecha:
28 de mayo de 2007 - 15:33
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
02′ 40″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
16.13 MBytes

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