Fiber-optic gyroscope high-coverage pre-flight self-inspection method and self-inspection system

Abstract

The invention belongs to a fiber-optic gyroscope self-inspection method and system, and provides a fiber-optic gyroscope high-coverage pre-flight self-inspection method and system in order to solve the technical problems that an existing closed-loop fiber-optic gyroscope self-inspection method is low in coverage rate, and only partial self-inspection can be performed on functional faults of the closed-loop fiber-optic gyroscope self-inspection method. A closed-loop feedback digital quantity of the fiber-optic gyroscope is accurately calibrated, and a calibrated self-detection excitation signal digital quantity is locked in a register of an FPGA (Field Programmable Gate Array) self-detection module in the fiber-optic gyroscope and is used for simulating the angular rate of a carrier during actual flight in a self-detection process, so that full-scale angular rate tracking precision self-detection is realized; meanwhile, the light intensity values of a non-modulation state and a modulation state are detected in a closed loop state, and difference operation is carried out after denoising is carried out on the light intensity values, so that light path self-detection is realized. Through self-inspection of the fiber-optic gyroscope, the fault state of the sensor can be accurately judged before flight, the probability of faults of an air system is reduced to the greatest extent, and the flight safety is ensured.

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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