A pre-flight self-inspection method and self-inspection system of a fiber optic gyroscope with high coverage

Abstract

The invention belongs to a self-inspection method and system of an optical fiber gyroscope. In order to solve the technical problem that the current closed-loop optical fiber gyroscope self-inspection method has low coverage and can only perform partial self-inspection on its functional failures, it provides an optical fiber gyroscope with a high coverage rate. Self-inspection method and self-inspection system, by accurately calibrating the digital quantity of the fiber optic gyroscope in the closed-loop feedback, and locking the calibrated self-inspection excitation signal digital quantity in the register of the FPGA self-inspection module inside the fiber optic gyroscope for the self-inspection process Simulate the angular rate of the carrier during actual flight to realize self-inspection of full-range angular rate tracking accuracy; use the closed-loop state to detect the light intensity values ​​of the non-modulated state and the modulated state, and perform difference calculation after denoising to realize the optical path self-test. Through the fiber optic gyro self-inspection, the fault status of the sensor can be accurately judged before flight, which minimizes the probability of air system failure and ensures flight safety.

Description

technical field [0001] The invention belongs to an optical fiber gyroscope self-inspection method and system, in particular to an optical fiber gyroscope pre-flight self-inspection method and a self-inspection system with high coverage. Background technique [0002] As the core angular rate sensor in the flight control system, the fiber optic gyroscope puts forward very high requirements for its pre-flight self-inspection capability. As a new generation of optical inertial instruments, closed-loop fiber optic gyroscopes are widely used in the flight control systems of aircraft, ships, rockets, satellites, missiles and other moving bodies. However, the existing closed-loop fiber optic gyroscope self-testing methods have low coverage and can only partially self-test its functional failures. Contents of the invention [0003] The main purpose of the present invention is to solve the technical problem that the current closed-loop optical fiber gyroscope self-inspection method...

AI Technical Summary

Problems solved by technology

However, the existing closed-loop fiber optic gyroscope self-inspection methods have low coverage and can only perform partial self-inspection for functional failures.

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