Notes on robot design - see also lirec notes & category robotics.
Robotics is the intelligent connection of perception to action“ - Michael Brady
Perception: Sensors tell a robot about the outside world.
Action: Actuators allow a robot to change the outside world, to act upon it.
Intelligence: Some sort of controller
State is what the robot collects in order to understand the world.
(not too happy about these definitions…)
Internal state: Directly observable state of the robot. Also it's internal representation of the world - it's internal model.
External state: What's happening in the real world. Can only be known via a robot's sensors.
Observable state: known at all times, usually internal - eg. battery state.
Partially observable state: Through a sensor, along with noise eg: camera image pixels
Hidden state: What you are actually interested in, in the real world - eg: position of user's head. Can't be directly known, must be indirectly inferred from (maybe multiple) sensors. See sensor fusion
Think hard - then act!
For example : Shakey, the first robot built with a planning AI system (running on a PDP-10 and PDP-15 computer).
Don't think, react!
For example: BEAM robots which stands for Biology, Electronics, Aesthetics, Mechanics, and was originally invented by Mark Tilden.
Or do both!