Group items tagged system - Robotics

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Mars Mass Balance Challenge - 0 views

shared by Astro Biology on 27 Sep 14 - No Cached

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Monte Carlo localization - Wikipedia, the free encyclopedia - 0 views

en.wikipedia.org/...Monte_Carlo_localization

shared by Filip Bártek on 18 May 15 - No Cached

particle filter localization
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typically starts with a uniform random distribution of particles
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hopefully most particles will converge to where the robot actually is.
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environment is static and does not change with time
- Filip Bártek on 18 May 15
  
  We also need to capture the robot's velocity in the state (pose) in case the robot has some momentum, so the three parameters may be not enough for a 2D robot.
  
  <div class="cArrow"> </div><div class="cContentInner">We also need to capture the robot's velocity in the state (pose) in case the robot has some momentum, so the three parameters may be not enough for a 2D robot.</div>
  
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assumes the Markov property
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position and orientation
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particles are uniformly distributed over the configuration space
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Given a map
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every time
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every time
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motion_update
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sensor_update
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sensor_update
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some noise is applied
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It now believes it is at one of two locations.
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The robot has successfully localized itself.
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actuation command
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no actuator is perfect: they may overshoot or undershoot the desired amount of motion
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the motion model must be designed to include noise as necessary
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Particles which were consistent with sensor readings are more likely to be chosen
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possibly more than once
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a robot becomes increasingly sure of its position as it senses its environment
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RoboLogo - Teaching Children how to program Interactive Robots - 0 views

web.mit.edu/...robologo.html grammar javacc logo mit robot

shared by York Jong on 09 Sep 07 - Cached

All of the procedures take a discrete ``gear'' to specify the speed. The reasons for this are two-fold; first, by limiting the power of the truck, we simplify the interface to children. Secondly, it allows use to calibrate the ``gears'' so that, for example, 10 seconds forward in first gear is the same distance as 10 seconds backward in first gear.
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The limitation of LOGO however is the lack of feedback from the environment. There is no way of expressing an event occuring in the outside world.
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Simple constructs in iLogo extend the original LOGO language with interactivity capabilities of reading sensors and transfering control to different parts of the program.
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These above rules handle all of the commands and expressions of the iLogo language except for the DoUnlessCommand. This command will execute a list of commands unless a boolean condition is met. If so, control is switched to a new list of commands for handling the exception condition.
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Each stage of the compiler is designed using the Visitor pattern described in the book Design Pattern by Eric Gamma, et al. This pattern allows tree traversers to be created as seperated objects, instead of doing all traversals as methods of the nodes of the tree
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We decided to use the JavaCC/JJTree tools created by Sun for generating a custom parser for our iLogo language written in Java.
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The language must have primitives which allow the user of the language to write programs which easily transfer control based upon outside stimuli, in this case sensors on the truck.
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An LM18293 push-pull motor driver connects the programmable counter array (PCA) of the 8051 to the truck's motors.
- York Jong on 09 Sep 07
  
  LM18293 is a DC motor driver.
  
  <div class="cArrow"> </div><div class="cContentInner">LM18293 is a DC motor driver.<br></div>
  
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We took the Berkeley Logo language design as our base and then added a primitive for reading sensor and an exception-based control structure.
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York Jong on 09 Sep 07

RoboLogo is a system that enables children to program interactive robots. Children can program a robotic truck that interacts with the environment without having to deal with low-level implementation details.

<div class="cArrow"> </div><div class="cContentInner"> RoboLogo is a system that enables children to program interactive robots. Children can program a robotic truck that interacts with the environment without having to deal with low-level implementation details.</div>

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