Product Design & Development

Microstrain’s Miniature GPS-Aided Inertial Navigation System

By Microstrain
Wednesday, August 17, 2011

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GPS-Aided
The 3DM-GX3 -45 high-performance, miniature GPS/INS features on-board Extended Kalman Filter for optimal position, velocity, and attitude (PVA) estimation.



The 3DM-GX3 -45 high-performance, miniature GPS/INS from Microstrain (Williston, VT) combines MEMS inertial sensors, a highly-sensitive GPS receiver, and a complex Extended Kalman Filter to generate optimal position, velocity, and attitude (PVA) estimates. This combination of technologies creates better short-term GPS-out performance, sustained-G attitude performance, and provides higher rate PVA data than typical GPS and AHRS Sensors. Features include:

  • On-board Extended Kalman Filter for optimal position, velocity, and attitude (PVA) estimation.
  • An operating temperature range of -40° to 65°C.
  • Improved performance under vibration, as inertial sensors are sampled at 30 kHz and digitally filtered and scaled into physical units; coning and sculling integrals are computed at 1 kHz.
  • Kalman filter solution @ 100 Hz. rawIMUdata@100 Hz, andGPS data at up to 4 Hz with individual data quantity control.
  • Calibrated for sensor misalignment, gyro G-sensitivity, and gyro scale factor non-linearity to third order; gyro in-run bias is estimated and compensated by the Kalman filter.
  • Versions available from 1.7 g to 50 g and 50°/s to 1200°/s.

For more information visit www.microstrain.com.

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