Co-base installation-based transfer alignment accuracy quantitative evaluation method
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A transfer alignment and quantitative evaluation technology, applied in the field of inertial navigation system performance evaluation, can solve problems such as large reliability impact, poor applicability, large data storage and calculation
Active Publication Date: 2016-09-28
HARBIN ENG UNIV
View PDF6 Cites 18 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
The shortcomings of this type of algorithm are: (1) It involves a large amount of data storage and calculation; (2) It is greatly affected by the reliability of external reference information, and has poor applicability to areas with weak coverage of satellite navigation systems such as polar regions; (3) ) azimuth misalignment angle evaluation ability is poor, and the effective evaluation of azimuth misalignment angle depends on the active maneuver of the carrier. For carriers with poor maneuverability such as large ships, it may even be impossible to accurately evaluate the azimuth misalignment angle Case
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0029] Realization of the present invention comprises the following steps:
[0030] (1) Install the common base of the sub and main inertial navigation on the same aluminum plate, and construct the azimuth installation misalignment angle between the sub and main inertial navigation, so that the azimuth installation misalignment angle is less than or equal to 3 degrees;
[0031] (2) Place the aluminum plate with the sub- and main inertial navigation on the high-precision turntable, use the optical sight to make the y-axis of the main inertial navigation point to the north, and use the laser tracker to measure the distance between the sub- and main inertial navigation y-axis points The azimuth installation error angle is used as the reference value of the azimuth installation error angle;
[0032] (3) The main inertial navigation system starts up and completes self-alignment, and enters the navigation state;
[0033] (4) Sub-inertial navigation boot;
[0034] (5) The main iner...
Embodiment 2
[0046] Realization of the present invention comprises the following steps:
[0047] (1) Install the common base of the sub and main inertial navigation on the same aluminum plate, and construct the azimuth installation misalignment angle between the sub and main inertial navigation, so that the azimuth installation misalignment angle is greater than 3 degrees;
[0048] (2) Place the aluminum plate with the sub- and main inertial navigation on the high-precision turntable, use the optical sight to make the y-axis of the main inertial navigation point to the north, and use the laser tracker to measure the orientation between the sub- and main inertial navigation y-axis points The installation error angle is used as the reference value of the azimuth installation error angle;
[0049] (3) The main inertial navigation system starts up and completes self-alignment, and enters the navigation state;
[0050] (4) Sub-inertial navigation boot;
[0051] (5) The main inertial guide and...
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 belongs to the field of inertial navigation system performance assessment and relates to a co-base installation-based transfer alignment accuracy quantitative evaluation method aiming at strapdown inertial navitation system transfer alignment accuracy. The method comprises installing slave and main inertial navigation devices sharing a base on an aluminum plate, constructing slave and main inertial navigation device orientation installation misalignment angles, putting the aluminum plate with the slave and main inertial navigation devices on a high precision rotary table, guiding the y axis of the main inertial navigation device to point to the true north direction through an optical sighting telescope, measuring slave and main inertial navigation device y axis orientation installation error angles as orientation installation error angle reference values through a laser tracker and starting the main inertial navigation device to carry out autocollimation. The method can acquire alignment accuracy evaluation reference before transfer alignment and through comparison between the reference value and the evaluation value, alignment accuracy quantitative evaluation is realized. The method is free of slave inertial navigation device navigation calculation and smooth calculation after alignment, greatly reduces computation complexity and data storage demands and realizes repeated tests in short time.
Description
technical field [0001] The invention belongs to the field of inertial navigation system performance evaluation, and in particular relates to a transfer alignment accuracy quantitative evaluation method based on common base installation for strapdown inertial navigation system transfer alignment accuracy. Background technique [0002] Transfer alignment technology, using high-precision inertial navigation system as the main inertial navigation system, can quickly realize the initial alignment of medium and low-precision inertial navigation systems. The accuracy evaluation of transfer alignment can effectively evaluate the accuracy of transfer alignment schemes, and is used for the evaluation and optimization of transfer alignment schemes. [0003] A typical transfer alignment accuracy evaluation method usually makes the inertial navigation system perform navigation calculation after the transfer alignment is completed, and smoothly estimates the residual misalignment angle at...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more