Satellite multi-beam pointing deviation estimation method under multi-physics coupling effect
A multi-physics and coupling effect technology, applied in the field of satellite communication, can solve problems such as pointing deviation, antenna pointing drift, and difficult decoupling, and achieve accurate estimation, comprehensive coverage, and overcoming strong coupling effects
Active Publication Date: 2022-07-08
军事科学院系统工程研究院网络信息研究所
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[0002] Satellite antennas are affected by various environmental factors in space, which will lead to antenna pointing drift and introduce pointing deviations, which will lead to a decline in the quality of satellite communications. Therefore, it is necessary to calibrate the antenna through offset compensation and other methods
In order to achieve efficient and accurate offset compensation, it is necessary to model and calculate the pointing deviation of the satellite antenna. However, during the orbit, the satellite antenna is in a multi-physics field composed of electromagnetic field, temperature field, gravitational field, and mechanical field. There are strong coupling between various error effects caused by physical fields, and high-dimensional nonlinear characteristics that are difficult to decouple, so it is impossible to conduct independent analysis for various error effects
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[0031] figure 1 It is a flow chart of the method for estimating the pointing deviation of satellite multi-beam under the multi-physical field coupling effect of the present invention. The present invention will be described in detail below with reference to the accompanying drawings. The invention discloses a satellite multi-beam pointing deviation estimation method under the multi-physical field coupling effect, the steps of which include:
[0032] S1, build a multi-physics coupling pointing deviation model;
[0033] The step S1 includes:
[0034] The multi-physical field environment in which the satellite multi-beam antenna is located includes electromagnetic field environment, temperature field environment, gravitational field environment and mechanical field environment. The thermal deformation error of the satellite multi-beam antenna caused by the environment, the gravitational field environment and the mechanical field environment, the orbital error of the satellite ...
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The invention discloses a satellite multi-beam pointing deviation estimation method under a multi-physics field coupling effect, and the method specifically comprises the steps: constructing multi-physics field coupling pointing, analyzing the periodic characteristics of errors caused by multi-physics fields, then constructing a multi-beam antenna pointing deviation characterization function based on the periodic characteristics of the errors, carrying out the fitting solving of the pointing deviation characterization function, and carrying out the calculation of the multi-beam antenna pointing deviation. And finally obtaining the specific representation of the pointing deviation, and realizing the estimation of the satellite multi-beam pointing deviation by using the pointing deviation representation function of the satellite multi-beam antenna. The method has the advantages that a multi-beam antenna pointing deviation characterization function is constructed by exploring periodic characteristics of an error source, and the problems of strong coupling and difficulty in decoupling of antenna pointing errors under the condition of multiple physical fields are solved; various errors introduced by an electromagnetic field, a temperature field, a gravitational field and a mechanical field are comprehensively considered, error factors are comprehensively covered, and the obtained representation function can more accurately reflect the change condition of the antenna pointing deviation.
Description
technical field [0001] The invention relates to the technical field of satellite communications, in particular to a method for estimating the pointing deviation of satellite multi-beams under the multi-physical field coupling effect. Background technique [0002] Satellite antennas are affected by various environmental factors in space, which will lead to antenna pointing drift, introduce pointing deviation, and then lead to the decline of satellite communication quality. Therefore, it is necessary to calibrate the antenna through offset compensation and other methods. In order to achieve efficient and accurate offset compensation, it is necessary to model and calculate the pointing deviation of the satellite antenna. However, the satellite antenna is in a multi-physics field composed of electromagnetic fields, temperature fields, gravitational fields and mechanical fields during the orbit. There are high-dimensional nonlinear characteristics that are strongly coupled and di...
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IPC IPC(8): G06F17/15G01S3/14
CPCG06F17/15G01S3/14
Inventor 何元智
Owner 军事科学院系统工程研究院网络信息研究所