A non-interrupted control method for tracking linearly polarized satellites across the equator
A control method and technology of tracking lines, applied in the direction of control using feedback, etc., can solve problems such as communication interruptions, and achieve the effect of shortening time
Inactive Publication Date: 2017-10-03
UNIT 63680 OF PLA
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Problems solved by technology
[0008] The present invention conducts research on the problems encountered by space survey ships using linearly polarized communication satellites near the equator for many times. In order to effectively solve the communication interruption problem caused by the mobile ground station crossing the equator in satellite communication, it improves the performance of the mobile carrier near the equator. Based on the existing technology, a practical, effective and highly practical control method for tracking linearly polarized satellites across the equator without interruption of communication is proposed
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[0030] figure 1 For the flow chart of this method, based on hardware design, the required functions are realized through software control, and the specific steps are as follows:
[0031] 1. Improved design of the rotation range of the antenna polarization plane adjustment mechanism
[0032] When using linearly polarized satellites for communication, the polarization angle ranges from -90° to +90°. In the past, when designing ground station antennas, the rotation range of the antenna polarization plane is usually considered to be -90° to +90°. For For fixed stations and land mobile stations, it can meet the needs of use. However, for mobile ground stations such as ocean-going ships that need to maneuver in a large area around the world, using the above-mentioned traditional design, when the polarization angle changes by 180° when crossing the equator, the antenna polarization plane needs to be reversed by 180° accordingly. The adjustment process will cause a communication int...
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The invention discloses an uninterrupted control method for tracking a linearly polarized satellite crossing the equator, which consists of two parts: an improved design of an antenna polarization surface adjustment mechanism for a ground station; and a polarization control program design for an antenna control unit. The polarization control program includes the following steps: calculating the current position line polarization angle θ; judging whether the ground station has entered the equator region; judging whether it has crossed the equator, after crossing the equator, according to the calculation results of the theoretical line polarization angle θ, adopt different strategies Control the antenna polarization surface to rotate according to its corresponding angle θ′ (θ′=θ±180°); if the actual angle θ′ of the antenna polarization surface reaches the limit position, start the antenna recapture program, and the polarization surface is reversed by 180° And consistent with θ, during which the communication was interrupted for several minutes, and the equator adjustment was completed. The invention can effectively avoid the communication interruption caused by the reversal of the polarization plane when navigating near the equator, and has great significance for improving the ability to complete tasks near the equator.
Description
technical field [0001] The invention belongs to the field of automatic control of aerospace measurement and control technology, and relates to the technology of controlling the polarization surface of ground station antennas in satellite communication, in particular to a method for controlling the uninterrupted communication of tracking linearly polarized satellites across the equator. Background technique [0002] The polarization of an electromagnetic wave refers to the way in which the spatial orientation of the wave's electric field vector changes with time at any fixed point in space. There are three kinds of polarization of the wave. If the sagittal trajectory of the electric field is a straight line, the wave is a linearly polarized wave; if the sagittal trajectory of the electric field is a circle, the wave is a circularly polarized wave; if the sagittal trajectory of the electric field is an ellipse, the wave is Elliptically polarized waves. Linear polarization and...
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IPC IPC(8): G05D3/12
Inventor 林习良李康周锦标赵乾宏吕少华耿大孝钱小云顾夏华孙文杰孔令志
Owner UNIT 63680 OF PLA