An iterative calibration method, device, equipment and medium of an optical fiber inertial navigation system
By using an iterative calibration method for fiber optic inertial navigation systems and employing a Kalman filter for iterative compensation and correction, the problem of complex and error-prone inertial navigation system calibration is solved, achieving high-precision calibration results and improved time efficiency.
CN116295529BActive Publication Date: 2026-07-07HWA CREATE CORP
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HWA CREATE CORP
- Filing Date
- 2023-03-27
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
The calibration process of existing inertial navigation systems is complex and prone to large errors, resulting in low accuracy of calibration results.
Method used
An iterative calibration method for fiber optic inertial navigation systems is adopted. Sample data is collected by designing a reasonable calibration path, and a state error model and a measurement model are established. Kalman filters are used for iterative compensation and correction until the residual error converges to a stable value.
Benefits of technology
It simplifies the calibration process, improves the accuracy and precision of calibration results, saves calibration time, and reduces the requirements for calibration equipment.
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Smart Images
Figure CN116295529B_ABST
Abstract
The application provides an iterative calibration method, device, equipment and medium for an optical fiber inertial navigation system, which comprises the following steps: collecting sample data of the optical fiber inertial navigation system according to a preset calibration path arrangement scheme; establishing a state error model and a measurement model according to the sample data; calibrating parameters in the error model to obtain first error parameters and a first residual error by using the error model; compensating and correcting device error parameters in the first error parameters, and calibrating the first residual error to obtain second error parameters and a second residual error; and repeatedly performing the compensation and correction and the calibration until the residual error converges to a stable value. The iterative calibration method for the optical fiber inertial navigation system provided in the application iterates once by using system-level calibration data, minimizes the final calibration result error, performs the system-level calibration only once, simplifies the calibration process, and greatly saves the calibration time of the optical fiber inertial navigation system.
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