BMI088 Bias Instability and Alignment errors not specified in the datasheet

[rozerin]

Hello! I am a software engineer and currently we are doing a market analysis on the available MEMS-IMUs on the market. Currently I am evaluating BMI088 IMU and I am missing some technical parameters from the data sheet. I need to learn the Bias Instability term for accelerometer and gyroscope of the IMU and the misalignment term for the gyroscope. Could you please support me on this issue?

Thanks a lot for your help!

Best regards,

[FAE_CA1 · Accepted solution]

Hi,

Thank you for your inquiry. BMI088 gyro bias instability is not specified in the datasheet. You can find it in the Flyer at https://www.bosch-sensortec.com/media/boschsensortec/downloads/product_flyer/bst-bmi088-fl000.pdf. It is less than 2 degree/hour.

BMI088 gyro has typical cross axis sensitivity of +/-1% in the datasheet. This corresponds to the misalignment error of +/-(atan(0.01)) = +/-0.57 degrees.

Thanks.

[rozerin]

Thank you very much for the detailed explanation. By any chance, is there a way to learn the bias instability and the misalignment for the accelerometers as well? That would be very helpful.

Thanks and best regards,

[FAE_CA1]

Hi,

The BMI088 accel bias instability is less than 30ug. The typical accel alignment error is +/-0.5 degrees that is specified on page 9 of BMI088 datasheet at https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi088-ds001.pdf.

Thanks.

[Silva]

Regarding to the BMI088 Gyro Bias instability estimation, my calc result is that, similar to BMI088 spec. @ 12Hour static data log catch on

marble platform, 125dps range,  -3db Bandwidth 12Hz, 100Hz ODR.