Tech Base

GNSS outage navigation: how a dual-rate Kalman filter combines carrier-phase time differencing, pseudorange and SINS to keep accuracy and extend coasting time when satellite signals are lost.

Underground roadheaders get no satellite fix. See how GNSS denied navigation fuses inertial sensing, odometer aiding and stereo vision to hold position.

A MEMS IMU loses attitude accuracy on paddy-field machinery in three conditions: gyro drift at idle stops, external acceleration in turns, and pose transients.

1. Why Pipeline Positioning Is Hard: GNSS-Denied Dead Reckoning and a Diverging AzimuthA satellite navigation system can, in most application scenarios, provide a carrier...

See how a robotics IMU closes the servo loop on an industrial robot end effector: MEMS sensor selection, SPI over long cable, filtering, feedback compensation.

1. Why Intelligent Vehicles Must Monitor Inertial Sensor HealthAs the primary device for acquiring information, sensors are the foundation on which a control system...

Learn the six-position parameter correction method for MEMS IMU calibration. Achieve 0.06% scale factor accuracy and suppress temperature drift errors by up to 98%.

Online spatial-temporal calibration between monocular camera and IMU improves VIO accuracy by ~15%. Covers pre-integration, initialization, time delay modeling, and joint optimization.

This article defines drift rate, describes systematic vs. random drift, describes the units of measurement such as meru, and compares the performance of the types of gyro (ESG, DTG, floated) and different applications (from aircrafts to submarines).

This article describes the gyroscope gimbal motion by introducing the tip trajectory method on a spherical surface and its simplified and practical representation on a phase plane for the dynamical analysis.