[iancarroll]

It’s cool to see how they compensated for the IMU inaccuracy. I bought an IMU off of Amazon once and tried to use it to measure the position of a steering wheel. This worked for one rotation, but as it mentions, it’s incredibly hard to compensate for the error margin — as you integrate more measurements, the error builds up irreconcilably to the point where it’s a useless instrument.

I am sure the one on the Mars helicopter had more precision though :)

[dieortin]

I might be wrong, but I think the data from the accelerometers would be enough to know the position of the steering wheel without any accumulating error. Of course, the gyro data can be incorporated to improve the system.

[ganzuul]

The accelerometer would be fine until you take a corner. Then things would get exciting.