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A Scanning Control Method of Antenna Azimuth Axis During Satellite Searching in Motion

An antenna orientation and scanning control technology, which is applied in the field of satellite communication, can solve the problems of antenna star-finding accuracy reduction, system stability impact, antenna system azimuth axis mis-scanning, etc., to ensure satellite pointing accuracy, improve retrieval success rate, and retrieve The effect of looser conditions

Active Publication Date: 2017-11-28
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

However, if the moment of inertia of the antenna is large, the instantaneous start and stop of the antenna will affect the stability of the system, and the long-term operation will reduce the reliability of the antenna system, resulting in the reduction of the initial star-finding accuracy of the antenna.
[0005] Therefore, how to avoid the instability of the antenna system caused by the sudden start and stop of the antenna in the case of large dynamic carrier, and solve the problem of misscanning of the azimuth axis of the antenna system is a key to realize the accurate alignment of the antenna to the satellite during the satellite search in motion. difficulty

Method used

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  • A Scanning Control Method of Antenna Azimuth Axis During Satellite Searching in Motion
  • A Scanning Control Method of Antenna Azimuth Axis During Satellite Searching in Motion
  • A Scanning Control Method of Antenna Azimuth Axis During Satellite Searching in Motion

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Embodiment

[0067] Preset acceleration and deceleration increment FSLOPE=0.0005°, low-speed angular rate FVSLOW=6° / s, maximum angular rate FVMAX=40° / s, control period T=0.005s, then the drive control diagram realized by the present invention is figure 2 shown. figure 2 The first stage is the acceleration state stage, the second stage is the rotation stage after accelerating to the maximum angular rate, the third stage is the deceleration state stage after finding the maximum signal point, and the fourth stage is the final reverse state stage. From figure 2 It can be seen that the scanning process of the azimuth axis of the entire antenna system is very smooth, and there is no large movement of sudden start and stop. And the antenna system is also smoothly decelerating when satellite signal maxima are detected. When the rotation angular velocity is decelerated to zero, since the set range of the inversion angular velocity is appropriate, the instability of the antenna system will not ...

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Abstract

The invention provides a scanning control method of an antenna azimuth axis in SOTM (Satcom On The Move) satellite finding. According to the method, on the basis of tracking carrier motion by an antenna, the antenna azimuth axis is driven to carry out whole ring scanning through an accelerating process, and a satellite signal is recorded. Then the secondary method fuzzy retrieval mechanism of the satellite signal is utilized, the effective range of the satellite signal is determined, and an antenna decelerating process is started to carry out deceleration. Finally after the antenna is decelerated to a preset rate, an antenna inverted rotation process is set, the antenna is controlled to reversely rotate to a satellite signal strongest point, and the scanning driving control in antenna azimuth axis satellite finding is completed. According to the method, the system instability problem caused by antenna sudden stop and start moments is solved, and through implementing an effective satellite largest signal determining mechanism, the scanning control in antenna azimuth axis satellite finding is realized.

Description

technical field [0001] The invention provides a scanning control method of an antenna azimuth axis during star-seeking in motion, which is suitable for occasions where the azimuth axis of the antenna is required to scan to the maximum value of satellite signals quickly and steadily during satellite-seeking in motion, and belongs to the technical field of satellite communication. Background technique [0002] When the antenna system in motion based on the inertial navigation scheme seeks satellites, the inertial navigation system uses the initial alignment method to solve the current pitch angle P, roll angle R, and heading angle Y information of the carrier, and then guides the antenna to point to the target satellite through coordinate conversion. Due to algorithm errors, calculation errors and other reasons, there are also errors in the initial alignment of the inertial navigation system under large dynamics of the carrier, resulting in a reduction in the accuracy of the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q3/06
CPCH01Q3/06
Inventor 郭涛王盛邬江
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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