On-line alarm method for open-loop fault of closed loop of fiber-optic gyroscope
An open-circuit fault, fiber-optic gyroscope technology, applied in Sagnac effect gyroscopes, instruments, measuring devices, etc., can solve problems such as designing a self-diagnosis scheme without open-circuit faults and inability to detect open-circuit faults, avoiding economic losses, guaranteeing safety effect
Pending Publication Date: 2022-07-12
CHONGQING HUAYU ELECTRIC GRP
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] However, in addition to closed-loop faults, open-circuit faults in the closed-loop loop of the fiber-optic gyroscope are also common in the faults of the fiber-optic gyroscope. Moreover, when the fiber-optic gyroscope has an open-circuit fault, its combing diagram will also show a flat state. The above patents cannot detect open circuits. In addition, in the prior art, there is no self-diagnosis scheme designed for open-circuit faults
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0027] In order to facilitate the understanding of the principle of the present application, the closed-loop principle of the fiber optic gyroscope will be described first. Taking square wave modulation as an example (four-state modulation or other modulation methods are similar), the optical power reaching the detector under square wave modulation can be expressed as follows:
[0028]
[0029] In the formula: P0 is when the fiber optic gyroscope is absolutely stationary (Φ S =0) the optical power reaching the detector; Φ S is the phase difference due to rotation. In the formula: Φ m for:
[0030]
[0031] In the formula: Φ0 is the modulation amplitude of the square wave, and τ is the transit time of the optical fiber ring (that is, the time for the light wave to transmit one cycle in the optical fiber ring).
[0032] After the above square wave modulation, the positive and negative modulation half-cycles can be sampled respectively to obtain the parity sampling valu...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to the technical field of fiber-optic gyroscopes, in particular to a fiber-optic gyroscope closed loop open-circuit fault online alarm method which comprises the following steps: S1, acquiring operation data of a fiber-optic gyroscope closed loop; s2, carrying out signal characteristic analysis according to the operation data of the closed loop, if a signal characteristic analysis result is that only a direct current component exists, judging that the fiber-optic gyroscope has a closed loop open-circuit fault, and turning to S3; otherwise, returning to S1; and S3, replacing the rotation angular velocity information sent to the navigation system with the open-circuit fault information of the closed loop. According to the invention, the navigation system can be informed in time when the fiber-optic gyroscope has the closed-loop open-circuit fault, so that the navigation system is prevented from giving wrong attitude information to cause a command and control system to send out a wrong command, and economic loss and even casualties can be avoided to a certain extent.
Description
technical field [0001] The invention relates to the technical field of fiber optic gyroscopes, in particular to an on-line alarm method for an open-circuit fault of a fiber optic gyroscope closed-loop loop. Background technique [0002] The fiber optic gyroscope is the core device of the inertial navigation system. It uses the rotational angular velocity information provided by the fiber optic gyroscope to complete the attitude calculation of the carrier. However, when a closed-loop fault occurs, the fiber-optic gyroscope will still send abnormal data to the navigation system. In the case of an unknown gyro closed-loop fault, the navigation system will still perform attitude calculation based on the abnormal data, resulting in the failure of the attitude north finding task. The wrong attitude information provided by the navigation system may cause the command and control system to issue wrong instructions, resulting in huge economic losses and even casualties. [0003] Ther...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/72G01C25/00
CPCG01C19/721G01C25/005
Inventor 李光辉
Owner CHONGQING HUAYU ELECTRIC GRP