Initializing method of mobile satellite communication antenna
An initialization method and mobile satellite technology, which is applied in the fields of automatic control, inertial navigation and mobile satellite communication, can solve the problems of large heading error, inability to obtain accurate command angle of the antenna, low precision, etc.
Inactive Publication Date: 2012-09-12
北京星网宇达科技股份有限公司
View PDF5 Cites 34 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This solution has high requirements on the inertial navigation system. In order to ensure that the antenna can lock the largest satellite signal, the autonomous north-seeking accuracy of the inertial navigation system must reach more than 0.1°, and the cost of such a high-precision inertial navigation system has far exceeded The cost of the mobile satellite communication antenna itself is unaffordable for most development units and users
In order to effectively reduce the cost, a low-precision vehicle-mounted inertial navigation system must be selected, and the low-precision inertial navigation system cannot autonomously find the north to output the correct heading. Therefore, the antenna cannot obtain accurate star-to-star command angles.
In order to solve
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
[0037]Assuming that the satellite to be tracked is Zhongxing 5 satellite, its longitude is 110.5°, and the longitude λ of the location of the mobile satellite communication antenna is a 116 degrees, latitude L a is 40 degrees, the earth’s radius R=6378.17km, and the satellite’s height H=36000km; assuming that the pitch angle, roll angle, and heading angle of the carrier coordinate system (the antenna carrier coordinate system is consistent with the antenna base coordinate system) at the time of star-seeking are respectively It is: 0°, 6°, 0°; since the low-cost inertial navigation system cannot accurately give the heading angle, but can accurately give the pitch angle and roll angle, it is assumed that the pitch angle of the carrier measured by the inertial navigation system , roll angle, and heading angle are: 0°, 6°, and 10° respectively, and the error of heading angle output by inertial navigation is 10°.
[0038] According to formula 1, the coordinate value of the satelli...
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 an initializing method of a mobile satellite communication antenna. According to the method, the mobile satellite communication antenna provided with a low-cost inertia navigation system can fast align a satellite and accurately estimate an initial course angle of the low-cost inertia navigation system. The method comprises the steps of: firstly calculating a satellite searching instruction by utilizing the initial course and gesture information of the low-cost inertia navigation system, then controlling a pitch axis and a polarization axis of the antenna to rotate according to calculated pitch instruction angle and polarization instruction angle; controlling an azimuth axis to scan between 0 and 360 degrees at a constant speed, and finding out an accurate course instruction angle through a satellite beacon recognition technology; accurately estimating the initial course angle error of the low-cost inertia navigation system by utilizing three-coordinate calculation and an iterative algorithm; finally calculating the satellite searching instruction of the antenna again according to the estimated inertia navigation course and gesture information, and controlling the antenna to rotate according to the instruction angle and accurately align the satellite. After finishing initialization of the antenna by using the method, the antenna can track the satellite in real time with high precision.
Description
technical field [0001] The application relates to an initialization method of a mobile satellite communication antenna, and relates to the fields of automatic control, inertial navigation and mobile satellite communication. The method described in this application can be widely applied to various mobile satellite communication devices, such as vehicle-mounted, ship-mounted, and airborne mobile satellite communication antennas. Background technique [0002] Mobile satellite communication equipment can make the satellite antenna always align with the geosynchronous satellite on the moving carrier, realize high-bandwidth real-time image and data transmission, and have a very wide application prospect in national defense, frontier defense, anti-terrorism, emergency relief, government and other departments. [0003] The mobile satellite communication antenna consists of two parts: the antenna feed system and the servo control system. Antenna feeder system includes antenna surfac...
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): G01S19/49
CPCH04B7/18517
Inventor 徐烨烽李耀鹏薛宏滨
Owner 北京星网宇达科技股份有限公司
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Try Eureka
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap