What gyro and/or accelerometer do you use?

[MaxMax161]

I'm interested to hear what people's experiences are with various gyro and accelerometers. Do you stick with the KOP ones, or do you have one you've been using for a while? Any fancy tricks or advice as to getting it to work nicely?

[faust1706]

I'm interested to hear what people's experiences are with various gyro and accelerometers. Do you stick with the KOP ones, or do you have one you've been using for a while? Any fancy tricks or advice as to getting it to work nicely?

In the past, we have used the KOP one, and we have had trouble with it climbing. (It got pretty bad in some matches last year, climbing at a rate of over 1 rps). This year, we are using an arduino based one, the name escapes me.

A "fancy trick" we are doing this year is using vision to do a check on the gyro. The vision returns x y and z displacement as well as pitch roll and yaw. The yaw in vision is the same as the gyro reading that we care about, so every 2 seconds or so, we will set the gyro reading to what vision says it actually is.

[Joe Ross]

We have used the KOP gyro for the last several years without issue.

The main trick is to make sure the robot is stable during calibration and then reset the angle at the very beginning of autonomous. It will drift, but this minimizes the drift and has never caused us a problem during autonomous.

[gpetilli]

We are switching to a 9axis IMU called GY-85 available on ebay for $16 including shipping. It uses an I2C interface for accel, gyro and compass. We use the compass as the field orientation instead of integrating the gyro. Works well as long as the sensor is >20" above the motors.