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Antenna tracking system used for mobile satellite communication system

A technology of system design and core content, applied in antennas, electrical components, etc., can solve problems such as low precision, and achieve the effects of high precision, low cost, and strong real-time performance

Inactive Publication Date: 2011-08-17
宗鹏 +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the main problem of micro-electromechanical gyroscopes is that the accuracy is relatively low, and its drift will cause large measurement errors, and it can only provide reliable measurement information in a short time

Method used

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  • Antenna tracking system used for mobile satellite communication system
  • Antenna tracking system used for mobile satellite communication system
  • Antenna tracking system used for mobile satellite communication system

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Embodiment Construction

[0016] The traditional "Static Communication" mostly adopts the pitch-azimuth two-axis tracking mode, calculates the observation angle according to the orbit of the satellite, performs program tracking or rough tracking, and then performs scanning or fine tracking according to the signal quality. This "Motion Communication "In terms of control logic, the scheme of isolating motion disturbances and tracking satellites at the same time is adopted, that is, the algorithm of "three-axis stabilization + dynamic search". Since the two control loops cannot be completely independent of each other, in order to reduce redundant actions and misoperations , it is necessary to nest two loops for optimal control, such as image 3 As shown, the shaded part in the figure is used to isolate the disturbance from the platform. In the tracking process of the system, the three-axis stabilization algorithm combined with attitude measurement and compensation is used first to isolate the change of th...

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Abstract

The invention relates to an antenna tracking system used for a mobile satellite communication system. The antenna tracking system is based on combination of multiple sensors for performing posture measurement, and fusion and estimation are performed on the combination of magnetic strength information, acceleration information and angular speed information. The method of three-axis stabilization plus dynamic search is adopted, and an inner ring for combined posture measurement compensation is used for realizing the three-axis stabilization, so as to prevent the posture of a carrier from being affected by the environment; and a strength signal output by a digital receiver is introduced into a controller as a feedback signal for constituting an outer ring for tracking a level signal, so that the way of double-ring nestification dynamic search of the maximum point in the signal can be formed for performing error compensation. The specific algorithm is as follows: utilizing a carrier rotation angular speed component measured by a three-axis gyroscope to perform Kalman filtering on a measured gravitational acceleration component and a geomagnetism induction density component, removing interferences caused by accelerated motion and an external magnetic field, further getting a true value, and finally utilizing the value to perform the posture resolution.

Description

Technical field: [0001] The "Motion Communication" antenna tracking system is a complex multi-disciplinary technology-intensive complex, which includes inertial navigation technology, micro-inertial sensor application technology, data acquisition and signal processing technology, precision mechanical design technology, precision mechanism kinematics and Dynamic modeling and simulation technology, motion control technology, closed-loop servo control technology, satellite communication technology and system engineering technology and many other technologies. This kind of stable tracking system is mainly based on mechatronics and automatic control technology, and is the product of the organic combination of multiple disciplines. , emergency rescue and disaster relief, field operations and other military and civilian occasions. Although "Mobile Communication" has been studied extensively at home and abroad, how to design a cost-effective system using relatively low-cost sensors i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q3/08
Inventor 徐诚宗鹏
Owner 宗鹏
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