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Gyrocompass Modeling and Simulation System™ (GMSS)
AGNC-GMSS
Way to evaluate your gyrocompass

This product was developed from the technologies of the following awarded US Patents: 6,234,799; 8,005,635; 6,127,970; 6,298,318; 6,473,034; 6,735,523 and pending US patent application 12/924,359.

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The AGNC-GMSS is a suite of tools for testing, modeling, analysis, and simulation that can greatly facilitate the development and evaluation of gyrocompassing based Precision Azimuth and Vertical Angle Measurement (PAVAM) systems and other azimuth and attitude determination devices and modules. The Gyrocompass Modeling and Simulation System (GMSS) which is especially developed for these systems is used as a virtual laboratory to provide a suite of software modules to simulate a detailed anatomy of a PAVAM system.

The users can perform any kind of virtual experiments they desire to explore the behavior of a PAVAM system design under different combinations of conditions for motion, sensor accuracy, and processing algorithms. The GMSS can perform many virtual experiments that are costly or even impossible in a real hardware system test.

• Windows based GUIs are used to provide the GMSS user interface and data visualization.


• A 6DOF motion simulator is used to simulate motion and disturbances such as vibration and tripod sinking in soil. Different kinds of sensor errors and random noise are simulated, as depicted below.

The GUI of the 6DOF Motion Simulator

• The IMU simulator window of the AGNC-GMSS is used to simulate different kinds of sensor errors and random noise, as depicted below

The GUI of the IMU Simulator

• The gyrocompass and Kalman Filter simulator of the AGNC-GMSS is used to simulate coarse and/or fine alignment processes and their algorithms, as depicted below

The GUI of the Gyrocompass and Kalman Filter Simulator

Key Features

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  • Kalman Filter is used for variables and parameters estimation.

  • A Monte Carlo test controller is provided to automate the iterated stochastic test process. Analysis and visualization tools are provided to perform the statistics of the Monte Carlo tests.

  • Analysis and visualization tools are provided to perform the statistics of the Monte Carlo tests.

  • Suite of auxiliary tools are used for real sensor data acquisition, sensor modeling and analysis, system verification and validation. The tools include: Stochastic signal analysis tools---PSD/DFT, Allan Variance and statistical analysis, stochastic signal generation, generic filter and Kalman filter design and testing.

  • When connected to external inertial sensors, a real-time hardware-in-the-loop testing, modeling, and simulation system can be achieved.

  • Based on the sensor parameters of the system, GMSS provides gyrocompass accuracy in terms of: azimuth accuracy, elevation/pitch accuracy and tilt/roll accuracy.

GMSS Brochure

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