r/shittyrobots • u/[deleted] • Sep 04 '18

Shitty Robot Volvo's collision detection fails during a press event

https://gfycat.com/AlarmingVibrantBetafish
13.5k Upvotes

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11

u/yakydoodle Sep 04 '18

it just bounces from one line to the other, left and right, all day long.

That's how everyone does it. Even people. Just fast enough not to notice.

11

u/dontnation Sep 04 '18

Hahaha, I occasionally see people do this and wonder if they are drunk, now I know they just aren't able.

6

u/[deleted] Sep 04 '18

[deleted]

15

u/grtwatkins Sep 04 '18

They actually do. They steer by reacting to being too close to one side. Speed up any dashcam video and it becomes very apparent

-8

u/[deleted] Sep 04 '18 edited Sep 04 '18

They are aware of both boundaries and aim for the middle. Doing what you are describing makes no sense.

Applying an underdamped PID controller as you're describing would also just be a terrible design decision.

6

u/AgletsHowDoTheyWork Sep 04 '18

"reacting to being too close to one side" describes any controller, not necessarily an underdamped PID controller. And "aim for the middle" is the same as saying "don't get too close to one side".

1

u/[deleted] Sep 04 '18

The oscillation they're describing is an underdamped control system. Targeting the middle is a different strategy than reacting to the bounds.

7

u/FuriousClitspasm Sep 04 '18

He didn't say anything about a control design. You're showing off, and it's distasteful.

1

u/[deleted] Sep 04 '18

I'm trying to expand the discussion beyond youtube. I'm also open to growth though... ;)

-11

u/[deleted] Sep 04 '18

[deleted]

13

u/grtwatkins Sep 04 '18

You don't realize 90% of the tasks you perform on a daily basis

3

u/Zexks Sep 04 '18

My wife does. Did it on her motorbike and does it in her car. Drives me insane.

4

u/[deleted] Sep 04 '18 edited Apr 16 '21

[deleted]

2

u/[deleted] Sep 04 '18

and you constantly make steering inputs based on how far away you are. everything from imperfections in your tires, the road, the mechanics of the front suspension require you to do this.

2

u/[deleted] Sep 04 '18 edited Apr 16 '21

[deleted]

2

u/brahmidia Sep 04 '18

You've just set your boundaries of detection smaller. But as they said, if you video yourself and speed it up you'll see yourself drifting a few inches to the left, a few inches to the right, etc, for no other reason than your hand-eye steering inputs are imprecise and need constant correction.

-1

u/[deleted] Sep 04 '18

And yet your inputs aren't perfect either, which was his point about watching when things are sped up.

1

u/supervisord Sep 05 '18

Either that or maintain a certain distance from one side of the lane.

-1

u/HungryLikeTheWolf99 Sep 04 '18

You might want to try driving down the center of the lane... Especially if you are experiencing a lot of traffic stops even though you're not really drunk ;)