Have YOU used the gyro chip?

I’m fairly curious as to what people have done/plan to do with their gyro chips.

Any information about tried-and-true methods of using them for anything would be nice.

More specifically, we’re thinking of using one to keep track of absolute direction (trivial mathematical tweaking aside), but I find the chip itself to be rather volatile for making accurate readings, especially when a robot can turn at more than 64degrees/sec (which is the point at which the gyro maxes out)…

Umm… Well… Besides trying not to sound like a complete n00b, I’m not sure what to do with it (the gyro)…
It seems like a waste to get a >$100 piece of equipment every year, and not to use it…

The Gyrochip? THIS year… we’re using it as a doorstop… Well… ok I wanted to use it for a mouse like control system, but that scheme proved to be too ambitious.

Best Wishes

Steve Alaniz

“What good is technology if you can’t abuse it?” - Ted Forth

They sit in our storage closet. In there they collect dust. I think we now have like 4.

I asked my advisor the one day if i could take one apart so that i wasnt bored. *** It was before kickoff!!

What will you take for them?

One can never have enough yaw rate sensors.

Joe J.

I’ll gladly trade our gyrochip for one Dr. joe patented FIRST robot strafe drive :slight_smile:

LOL yeah I will take that lol. I dont know if we can sell them or not I will have to ask lol.

email me: if you want Dr. Joe at [email protected]

I mean trade!!! not sell hehe.:slight_smile: :smiley:

I’d heard that some teams have actually used them on their robotics in past seasons, including GRT (192) a couple seasons ago (for keeping a ball-carrier upright, if I recall correctly).

I was wondering if anyone could give a little more information about either their own team, or someone else, who’s used this doohicky (it’s a technical term :smiley: ) for anything.

Patrick Wang wrote:
> I’ll gladly trade our gyrochip for one
> Dr. joe patented FIRST robot strafe drive

What’s a “strafe drive”?

BTW… We’re your typically underfinanced rookie team, so we don’t have spares of ANYTHING yet. When we’re done, we’d be more than happy to horse trade unused stuff for spares. We’re especially interested in spare power electronics and motors.

Once that is done, we might be interested in talking about swapping some of the rest of our surplus for people’s piles of more exotic things like the gyrochips. IMHO, it would be great to concentrate enough copies here of any one thing established teams always seem to have too many of. That would allow us to create entire class experiments to help our robotics students gain experience in these parts.

Whatcha all need, and what do you have PILES of from previous years?

  • Keith

    Keith McClary, Advisor Huron High Rat Pack Team 830

We tried to use the gryo last year to have an ‘auto-balance buton’ to balance of the ramp. The buton worked, but then the robot did this really funny dance where it threw itself back and forth fairly violently. We never got the code to work quite right…

We have piles of drill moters. In the fall before kickoff, we do a simplified compition, making little robots out of plywood to move a soda can thruogh a maze and hand it off to another to do the course again, or something similar.
But then again we keep letting the magic smoke out…

The team we supported last year, #614, did use the gyro last year to help the robot drive straight and true. Drill motors were used to drive the robot, and they were mounted in an opposing orientation (ie, one motor would run fwd, other had to run rev, to move the 'bot forward, etc). Discovered that the motors did not have identical characteristics, etc. Used the gryos to sense the drift, left or right, and used this, banded and filtered a bit, as feedback into the motor control logic to help the robot drive straight. It wasn’t perfect, but it did improve the straight-line performance.

I also remember one team that did, indeed, use it to help auto-balance on the bridge. I believe they used the gyro to sense when the bridge was moving down (after they had embarked up it), then used the optical sensors and reflectors to count wheel revs needed to move in the other direction to balance. Some previous experiments were obviously done to calibrate that part of it.

I’m sure other guys figured uses for it as well. This year, well, not sure if we’ll use/need it yet or not.

HTH,

Night Vision Guy.