I need to build a stabilizatione device, which requires (customer requirement) the following specifications about noise:
- less than 0.05°/s in [0..150Hz] bandwidth
- less than 0.10°/s in [0..1kHz] bandwidth
Unfortunately, I cannot use filtering to reduce gyro bandwidth and consequently the noise. This application requires a phase delay of about 5° at 15Hz (customer requirement), so I cannot use internal FIR filtering or decimation, due to low gyro sample rate.
I compared the ADIS products in the attached table, but It seems that there aren't suitable ADIS devices.
In the last column, I added the competitors performance: as you can see, the ADIS is better in several key aspects, but for the noise I'm outside the specifications.
Noise is estimated as the following:
- in the 0..1kHz bandwidth, noise = noise_density * sqrt(BW*1.22), where BW is the gyro bandwidth
- in the 0..150Hz bandwidth, noise = noise_density * sqrt(150)
Please, have you any suggestions or help?
Thank in advance and best regards,
sorry if I bore you, but my customer is pressing me...
Thank you for your suggestion, but I cannot use the ADIS16136, due to space and budget constraints.
Instead, have you any update regarding my previous post (the possibility to "improve" the ADIS16488)?
Thank you again and best regards,