Significantly More Integrated Gyro Rate (Angle) Drift during Acceleration

[slkrug]

Hi,

I have a custom PCB for my company for automotive purposes with the ASM330LHHX as the IMU. Upon integrating the gyro rate (about the X axis, roll rate, see green line in 1st plot below) while acceleration is happening on the on the Y axis (Ay, see orange trace in second plot below), the purely integrated angle estimate diverges significantly more than it does otherwise without the Ay. This data is from a car driving around sporatically with some significant Ay events in both directions. 

What is the cause of this behavior from the gyro? Is there a specification that determines how much this behavior occurs, in a standard format of SI units?

Thank you,

Steve Krug
CTO
steve@axicleengineering.com

[Federica Bossi]

Hi @slkrug ,

From these graphs is difficult to understand what could be, surely this behavior is unexpected..

Can you give more details about your log scenario?

[slkrug · Accepted solution]

Thank you for the response Federica. I believe this may have been due to an error in my software, in fact. Thank you for the response anyways.