Single-point offshore calibration method of marine aided inertial navigation system
A technology of an inertial navigation system and a calibration method, which is applied to measurement devices, instruments, etc., can solve the problems of low calibration accuracy, shorten the time for calibration data collection, and long time for calibration data collection, and achieve the effect of improving accuracy.
Inactive Publication Date: 2012-07-18
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF4 Cites 13 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] In order to solve the problems of long calibration data collection time and low calibration accuracy in the "comprehensive calibration" method, the present invention proposes a single-point offshore calibration method for marine inertial navigation systems. The ship starts to sail after the initial startup of the dock. When sailing at sea for a period of time, when the inertial navigation system accumulates a certain navigation error and needs to be calibrated, according to this calibration method, the system can be calibrated only by obtaining a single-point position navigation data provided by the outside. This method can not only shorten the time for calibration data collection, And it can further improve the accuracy of the inertial navigation system
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
[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0023] The invention proposes a single-point marine calibration method for a marine inertial navigation system. The data used in the method originate from the inertial navigation system of the ship's equipment and the ship's satellite navigation receiver, and the ship's inertial navigation system and the ship's satellite navigation receiver are related. Information interface, the longitude and latitude data of the ship’s position obtained by the satellite antenna can be directly entered into the inertial navigation computer. The schematic diagram of the relationship between the inertial navigation system equipped on the ship and the ship’s satellite navigation receiver is as follows figure 2 shown.
[0024] Based on the above basis, in this embodiment, the inertial system error compensation during the navigation of the ship is simulated. The initial start-up of the...
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 an inertial navigation system, and aims to solve the problems of long time of calibration data collection and low calibration accuracy in a 'comprehensive calibration' method, and provides an offshore calibration method of a single-axis rotation-modulation strapdown inertial navigation system. The offshore calibration method comprises the following steps: a vessel is initially started at the dock, starts to sail, and sails for a period on the sea; wand hen the inertial navigation system accumulates certain navigation errors to cause that the calibration is needed, single-point position navigation data provided from the outside is required to be acquired according to the calibration method, and the system can be calibrated. According to the method, the time of calibration data collection can be shortened, and the accuracy of the inertial navigation system can be further improved.
Description
technical field [0001] The invention relates to the technical field of inertial navigation systems, in particular to a technical method for a long-endurance marine inertial navigation system to obtain navigation data of a single point at sea, and then perform calibration to improve accuracy. Background technique [0002] The marine inertial navigation system continuously and autonomously calculates and outputs various navigation parameters of the ship during the ship's navigation, including the ship's speed, attitude, course, and longitude and latitude of the position. The autonomy of the independent navigation function of the inertial navigation system, which does not need to use electromagnetic waves or light waves to communicate with external satellites or celestial bodies, is its advantage, but the error of the inertial navigation system, especially the error of the longitude and latitude of the position it provides , will continue to grow and accumulate with the prolong...
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 IPC IPC(8): G01C25/00
Inventor 汪湛清房建成汪顺亭
Owner BEIJING INSTITUTE OF TECHNOLOGYGY