Unit 9 03 Robot Tour Guide ExamplesYouTube↗  IA↗(long shot)
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[Narrator] Before diving into too much detail,
Antes de entrar em muito detalhe,
let me explain to you why MDPs really matter.
deixe-me explicar porque os MDPs são realmente importantes.
What you see here is a robotic tour guide
O que você vê aqui é um guia turístico robô
that the University of Bonn, with my assistance,
que a Universade de Bonn, com minha ajuda,
deployed in the German museum in Bonn,
instalou no museu alemão em Bonn,
and the objective of the this robot was to
e o objetivo dessa robô era
navigate the museum and guide visitors,
navegar no museu e guiar visitantes,
mostly kids, from exhibit to exhibit.
principalmente crianças, de seção em seção.
This is a challenging planning problem because
Esse é um problema desafiador de planejamento, pois
as the robot moves
conforme o robô se move,
it can't really predict its action outcomes
ele não pode prever os resultados da ação
because of the randomness of the environment
devido à aleatoriedade do ambiente,
and the carpet and the wheels of the robot.
além do carpete e de suas rodas.
The robot is not able to really follow its own commands very well,
O robô não consegue seguir seus comandos muito bem,
and it has to take this into consideration during the planning process
então ele tem que levar isso em consideração durante o processo de planejamento,
so when it finds itself in a location it didn't expect,
para que quando se encontre em um lugar inesperado,
it knows what to do.
ele saiba o que fazer.
In the second video here, you see a successor robot
No segundo vídeo, você pode ver um robô sucessor do outro,
that was deployed in the Smithsonian National
que foi instalado no Museu Nacional de História
Museum of American History in the late 1990s
Americana Smithsonia, no final da década de 90,
where it guided many, many thousands of kids
que guiou milhares e milhares de crianças
through the entrance hall of the museum,
no hall de entrada do museu,
and once again, this is a challenging planning problem.
e como o outro, esse também é um problema desafiador.
As you can see people are often in the way of the robot.
Como você pode observar, as pessoas entram no caminho do robô.
The robot has to take detours.
E aí ele precisa fazer desvios.
Now this one is particularly difficult because
Nesse caso era particularmente difícil porque
there were obstacles that were invisible
havia obstáculos invisíveis, como
like a downward staircase.
uma escada de descida.
So this is a challenging localization problem
Então esse é um problema desafiador de localização,
trying to find out where you are,
tentar descobrir onde você está,
but that's for a later class.
mas isso fica para outra aula.
In the video here, you see a robot being deployed in a nursing home
Nesse vídeo aqui, você pode ver um robô instalado em um asilo
with the objective to assist elderly people
onde o objetivo é ajudar os idosos,
by guiding them around, bring them to appointments,
guiando o caminho deles, trazendo-os para os compromissos,
reminding them to take their medication, and
lembrando o horário das medicações e
interacting with them, and this robot has been active for many, many years
interagindo com eles. Esse robô ficou ativo por muitos e muitos anos,
and been used, and, again, it's a very challenging planning problem
e podemos ver que se trata de um problema bem desafiador de planejamento,
to navigate through this elderly home.
navegar por dentro do asilo.
And the final robot I'm showing you here.
E o último robô que mostrarei é esse daqui.
This was built with my colleague Will Whittaker at Carnegie Melon University.
Ele foi construído com meu colega Will Whittaker na Universidade Carnegie-Mellon.
The objective here was to explore abandoned mines.
O objetivo aqui era explorar minas abandonadas.
Pennsylvania and West Virginia
Nos estados da Pennsylvania e
and other states are heavily mined.
West Virginia, ocorre mineração intensiva.
There's many abandoned old coal mines,
Existe muitas minas de carvão abandonadas,
and for many of these mines,
e em muitas dessas minas,
it's unknown what the conditions are and where exactly they are.
não se conhece muito bem suas condições e sua localização.
They're not really human accessible.
Elas não são acessíveis para seres humanos.
They tend to have roof fall and very low oxygen levels.
Desabamentos e quedas do nível de oxigênio ocorrem com frequência.
So we made a robot that went inside
Então fizemos um robô que pudesse entrar lá
and built maps of those mines.
e construir mapas dessas minas.
All these problems have in common that they
O que esses problemas possuem em comum é que
have really challenging planning problems.
eles são problemas bem difíceis de planejamento.
The environments are stochastic.
Os ambientes são estocásticos.
That is the outcome of actions are unknown,
Isto é, o resultado das ações é desconhecido,
and the robot has to be able to react to
e o robô precisa saber reagir
all kinds of situations, even the ones that it didn't plan for.
em todos os tipos de situações, inclusive nas inesperadas.
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