Question 1

How does zero-bias instability affect long-term navigation precision?

Accepted Answer

Zero-bias instability causes cumulative angle errors over time. For a 100-hour mission, this results in ~3 drift, critical for autonomous vehicles.

Question 2

What is the difference between ARW and zero-bias instability?

Accepted Answer

ARW is short-term noise (e.g., 10s of seconds), while zero-bias is long-term drift (hours). Together, they determine system accuracy.

Question 3

How does temperature affect zero-bias drift?

Accepted Answer

On-chip temperature sensor compensates for thermal expansion, maintaining stability.

Question 4

Can it maintain precision in high-vibration environments?

Accepted Answer

Yes, with 4.2g vibration resistance (20~2000 Hz sweep) and 30g shock tolerance.

Question 5

What is the factory calibration process?

Accepted Answer

Multi-temperature and multi-position calibration via 0x3F register offset adjustment, ensuring 0.1% scale factor accuracy.

Question 6

How does output rate impact INS system performance?

Accepted Answer

1000 Hz ODR minimizes latency, enabling smooth control loops for autonomous vehicles and UAVs.

Question 7

What causes angular velocity measurement noise?

Accepted Answer

Noise arises from thermal fluctuations, electronic interference, and mechanical vibrations. The on-chip LPF (0x3F) filters noise by up to 30 dB.

Question 8

How to correct scale factor errors?

Accepted Answer

Register-based calibration (0x3F) adjusts scale factor via 16-bit offset values, with factory calibration data provided in test reports.

Question 9

Can it function in GNSS-denied environments?

Accepted Answer

Yes, standalone 1000 Hz angular rate output with 2000 Hz sync (0x3F) enables dead-reckoning navigation.

Question 10

What is the long-term drift without re-calibration?

Accepted Answer

Zero-bias instability 0.03/h over 10,000 hours, with 1000 hour calibration intervals.

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