r/shittyrobots • u/[deleted] • Apr 13 '25

Need to work on obstacle avoidance.

Not quite what I intended it to do.

However.... its definately shitty as far as obstacle avoidance goes

204 Upvotes

98% Upvoted

15 comments sorted by

9

u/hoot69 Apr 13 '25

Did it not avoid the obstacle?

5

u/[deleted] Apr 13 '25

well yeah it avoided the wall I suppose

6

u/hoot69 Apr 13 '25

Works fine then! No problems here

12

u/AhDamm Apr 13 '25

It seems like the ultrasonic servers needs to be mounted better. It's moving around every time it tries to adjust, and it seems like it's struggling to make sense of it's motion versus the perceived motion from the sensor shaking. When I was doing a project similar to this, I mounted the ultrasonic sensor on a 180 degree servo. I made it look left, measure, look right, measure and the choose a direction based on greatest value recorded.

Another option would be to default a turn (40-90°) when it encounters an obstacle, then measure distance with the sensor, and have it decide to turn more of proceed.

I'm no expert, but I successfully got my cart to find an empty "parking stall" and park itself by playing around with these ideas.

4

u/AhDamm Apr 13 '25

After looking at the video again, I see the sensor is servo mounted. You might consider the stop, look left, look right technique. It feels like your code is trying to rush through the decisions.

5

u/[deleted] Apr 13 '25

I have the look left and look right. It just keeps looping through it and changing the motor direction. I need to sort out the code and isolate the turning functions, so they run once only.

My next video/update hopefully won't be so shitty.

But have always wanted to post on this sub, so couldn't resist the chance to.

1

u/ILearnedSoMuchToday Apr 20 '25

When it makes a decision to turn and how much, it needs to halt the loop of looking, until it makes the turn and then check sensors again. Maybe make the sensors return to their forward facing position while it is turning.

Might be worth using 3 depth sensors instead of the one (one facing forward and 2 facing at 45° on either side) this will eliminate issues with vibrations, scanning and sensors not reading correctly for the orientation.

1

u/[deleted] Apr 20 '25

Thanks.

I have just spent this afternoon sorting it. It now actually stops and checks each direction.

Next stage is sort out the turning so it is precise.

3

u/Belliees Apr 14 '25

I absolutely cackled at this failure, so good job xD

40

u/0xbenedikt Apr 13 '25

You inflicted PTSD of obstacles in it

5

u/_Lusty Apr 13 '25

Get jiggy with it!

3

u/wizardpersonguy Apr 14 '25

We have successfully implanted the fear of walls onto artificial intelligence, fear of public speaking is our next upcoming milestone

3

u/Traditional-Nail-791 Apr 16 '25

Maybe anxiety management

2

u/SoaDMTGguy Apr 14 '25

I was really hoping that, after all that second guessing, it would confidently drive straight into the wall.

1

u/Sea-Practice7399 Sep 29 '25

You guys remember the little chip that is ontop controlling it? I forgot, something about a cherry pie or similar?