Autonomy
You want to send a robot from one room to another — but there’s no map and it doesn’t know where the walls are. How would you do it?
A Roomba robot vacuum doesn’t get a map of your room in advance. When it bumps into something it backs up, turns to find a new direction, and slowly covers the whole floor.
The Roomba isn’t “smart” — it just follows simple rules: go straight → if you bumped, stop → turn randomly → go again. Run that long enough and the whole room gets cleaned! Complex behavior can come out of simple rules.
An autonomous robot is a system that can finish its task without a person stepping in. All the parts work in a loop: Sense (read the sensors) → Think (decide) → Act (control the motors) → Repeat. This “sense-think-act” loop is the robot’s brain, and it usually runs dozens of times a second.
🔁 Autonomous Exploration Loop:
1️⃣ SENSE: Measure the distance in every direction with the ultrasonic sensor
2️⃣ MAP: Add the measured distances to the inner map
3️⃣ DECIDE: Is the way open? → Move ahead
Wall in front? → Look right
Blocked on every side? → Turn back
4️⃣ ACT: Send the command to the motors
5️⃣ Back to 1 — repeat forever
The robot guesses where it is by counting how many squares it has moved (odometry).Have someone with a blindfold walk through a dark room — they move ahead by feeling the walls with their hands and build a “map” in their head. An autonomous robot does exactly this: it touches with its sensors, updates its map and heads toward unexplored areas.
Close your eyes, walk 5 steps in the dark, then stop — where are you? Now do the same while touching the wall. When could you tell where you were better? Why?
What is SLAM (Simultaneous Localization and Mapping)? How do modern robots and smart vacuums build a map and find their own position at the same time? Research it.
What is the basic loop of an autonomous robot?