I am trying to design a device that is used for capturing rotation. I think I will be using an IMU from Invensense, as I have a few of them to play with.
A big problem gyroscopes seems to be drift, particularly yaw drift, as the drift on pitch and roll axes can be (mostly) removed by using a accelerometer to monitor gravity.
Is there a reason not to mount the device "on it's corner/edge", assuming that most of the time the up axis will stay the same, so no axis will have to be aligned with the gravity field for long. I have tried googling for this, but haven't really found anything. I'm assuming there must be something wrong with my idea, as I didn't find it being commonly used.
In my case the computational power needed to rotate the "local" rotations to "world" locations is not an issue, as it can be either done on a 32-bit microcontroller or a pc that is connected to the uC.