A Fast and Fine Alignment Method of Fiber Optic Gyro Compass Based on Gravity Information
A fiber optic gyroscope and gravity technology, which can be used in measuring devices, instruments, etc., to solve problems such as unsatisfactory alignment speed and anti-interference degree.
Active Publication Date: 2020-05-19
TIANJIN NAVIGATION INSTR RES INST
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, many scholars have designed a rough alignment algorithm based on this idea, which effectively improves the accuracy and anti-interference degree of the rough alignment. Although the alignment algorithm has effectively improved the accuracy and anti-interference degree of the rough alignment, the fine alignment still uses the traditional method to correct the rough alignment error angle in the local geographic coordinate system, and the alignment speed and anti-interference degree are still not ideal , there is an urgent need for a new fast and precise alignment method for fiber optic gyro compass
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 Construction
[0064] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:
[0065] A fast and precise alignment method for fiber optic gyro compass based on gravity information, such as figure 1 shown, including the following steps:
[0066] Step 1. Define the coordinate system: the n system is the navigation coordinate system, using the local geographic coordinate system ENU; the e system is the earth coordinate system; at the initial moment of initial alignment, the e system is solidified in the inertial space to become i 0 , i 0 ' is the inertial solidification coordinate system for calculation; p system is the carrier coordinate system; i p0 The system is the inertial solidification coordinate system of the carrier; at the initial moment of initial alignment, the p system is solidified in the inertial space to become i p0 ;
[0067] Step 2, decompose the attitude matrix of the p system to the n system, and solve it...
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 a fiber optic gyrocompass rapid fine alignment method based on gravity information. The fiber optic gyrocompass rapid fine alignment method based on gravity information comprises following steps: 1, definition of a coordinate system is carried out; 2, matrix decomposition of p to n attitude matrixes is carried out, and step by step solving is carried out; 3, design of a fine alignment Kalman filter is carried out; 4, a filtering observed quantity Z is set; 5, the fine alignment Kalman filter obtained in step 3 and the filtering observed quantity Z obtained in step 4 are adopted for fine alignment. According to the fiber optic gyrocompass rapid fine alignment method, open Kalman filtering is carried out through skillful construction of inertial system speed observation information, direct fine alignment in an inertia solidification coordinate system is realized, and it is shown by actual measurement results that fiber optic gyrocompass rapid alignment can be realized at complex environment.
Description
technical field [0001] The invention belongs to the technical field of fine alignment in the initial alignment of a fiber optic gyro compass, and relates to a method for fine alignment of a fiber optic gyro compass, in particular to a method for fast and fine alignment of a fiber optic gyro compass based on gravity information. Background technique [0002] Fiber optic gyro compass is a new type of compass that has emerged with the maturity of fiber optic gyro technology. It can provide information such as heading, horizontal attitude, and rotation angle rate for ship maneuvering and stability control. The advantages of low cost of life and use are gradually recognized by the market and will replace the gyro compass. At present, accurate and fast initial alignment technology is one of the key technologies of fiber optic gyro compass, which directly affects the system accuracy. [0003] The initial alignment is generally divided into two stages: coarse alignment and fine ali...
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 Patents(China)
IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 邓东黎曹阳范鑫
Owner TIANJIN NAVIGATION INSTR RES INST