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Computer Simulation - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect Segment explaining how NASA uses computer simulation to design spacecraft, including the next reusable launch vehicle.

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What is a computer simulation? 00:00:00
How are computer simulations used to design spacecraft? 00:00:05
How are math and science used to plan for the next generation ROV? 00:00:09
The team and I are at the Collaborative Engineering Center, or CEC, here at NASA Marshall. 00:00:13
The CEC is a facility that enables scientists and engineers from across the country 00:00:19
to study spacecraft architecture in a virtual environment, kind of like a chat room, 00:00:25
before they build the vehicles. 00:00:30
They do this by using computer simulations. 00:00:32
Cathy, if I remember correctly, a computer simulation is a powerful tool that allows engineers, 00:00:35
such as yourself, to input data into a program. 00:00:40
Exactly. We get to play, or I mean study, what ifs with different types of engines, structures, 00:00:43
thermal protection, and whatever we want to test just by changing the data. 00:00:49
That's great. Now, what do you have the kids working on today? 00:00:53
Earlier, we talked about how different fuel choices, which propel the spacecraft, 00:00:56
affect the launch weight of the vehicle. 00:01:01
By using computer simulations, we can get a real-time idea of how these choices affect the whole architecture. 00:01:03
The computer simulation shows how one change can ripple through the entire system, like waves on a pond. 00:01:09
I get it. Computer simulations allow designers to see how one choice can affect the big picture. 00:01:15
Yes, and another reason why simulations are so useful is because we have over 20 years of experience with the space shuttle. 00:01:21
I see. So by looking at similar numbers and costs from the shuttle program, 00:01:28
you have a starting off point to begin testing new ideas. 00:01:33
Well, yes. Sometimes, of course, we have to use, engineers have to use their estimating skills 00:01:36
to come up with a starting point for their calculations. 00:01:42
Oh, well, can you give me an example? 00:01:44
Sure. Suppose you are looking at TPS, thermal protection systems. 00:01:46
Let's say that a low-maintenance TPS system weighs 3,000 kilograms, 00:01:50
and the total weight of the vehicle is 75,000 kilograms. 00:01:54
How would you estimate the thermal protection system weight to the vehicle weight ratio? 00:01:58
Okay, let's see. 3,000 kilograms TPS weight to 75,000 kilograms of vehicle weight. 00:02:02
By simplify and reduce, it's about 1 to 25. 00:02:11
Exactly. We might find that one system is heavier, but the reduced maintenance costs might still make it a good idea. 00:02:14
Of course, eventually, you have to build and test systems and hardware, 00:02:20
but think of the time and money you save testing with the simulations first. 00:02:23
And it allows more creativity. 00:02:27
Absolutely. See how they're trying different thermal protection systems? 00:02:29
Look what it does to the vehicle weight and structure, too. 00:02:33
What did we do before we had all this technology? 00:02:36
Well, for one thing, we did calculations by hand. 00:02:39
We also built and tested a whole lot more hardware. 00:02:43
Of course, that was okay then, but now engineers have so many more tools to help them. 00:02:46
But they still must use math, science, and technology. 00:02:51
First, there has to be computer scientists and mathematicians to design the software and hardware that is needed for computer simulations. 00:02:54
Remember, the computer only calculates the data, 00:03:02
but the engineers need sharp math and science skills to analyze the results and decide on the final design. 00:03:04
The Space Launch Initiative will get a spacecraft to orbit more safely and less expensively. 00:03:10
That's going to take a team effort. 00:03:15
And it's not too early for your next generation explorers to start getting ready. 00:03:18
Doing well in school is the most important step. 00:03:21
I couldn't agree with you more. 00:03:24
Thank you so much, Kathy, for sharing all the information you did with us. 00:03:25
We really appreciate it. 00:03:29
The kids had a great time, and I'm sure I'm going to have a really hard time pulling them away from here. 00:03:30
Well, thanks for coming. 00:03:34
You're welcome. 00:03:35
Hey, while we're here, let's do our last cue card reveal. 00:03:36
What is a computer simulation? 00:03:40
How are computer simulations used to design spacecraft? 00:03:42
How are math and science used to plan for the next generation RLV? 00:03:45
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Idioma/s:
en
Materias:
Matemáticas
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
207
Fecha:
28 de mayo de 2007 - 16:52
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
03′ 50″
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:
23.18 MBytes

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