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NSGA-III intelligent optimization algorithm for InSAR satellite cluster configuration

An intelligent optimization algorithm and satellite cluster technology are applied in three-dimensional position/channel control to achieve the effect of solving multi-objective and multi-constraint problems

Pending Publication Date: 2022-07-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing achievements only consider the two-satellite formation and design the configuration with the goal of configuration stability or high-precision baseline measurement. They do not start from the engineering application of the InSAR satellite system and comprehensively consider the safety, stability and Usefulness Requirements for System Design

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  • NSGA-III intelligent optimization algorithm for InSAR satellite cluster configuration
  • NSGA-III intelligent optimization algorithm for InSAR satellite cluster configuration
  • NSGA-III intelligent optimization algorithm for InSAR satellite cluster configuration

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Embodiment

[0098] The given cluster reference orbit is a near circular orbit with an orbit height of 550km, σ ΔhT The value is 3m. According to the "concentric ring" configuration feature, the constraint condition z=0 is obtained. In order to ensure that the configuration is stable and the main star is located in the center of the configuration, set the constraint l x =0, l y =0. Set short baseline B 1 The usable length constraint is 250m ~ 550m, the long baseline B 2 The available length constraint is 700m~1050m, then the optimization variable The optimization range can be set as :p 1 ∈[0,800m], p 2 ∈[0,1500m], In addition, the baseline also needs to meet certain accuracy requirements, so the constraints that the available baseline should meet are:

[0099] 250m≤B 1 ≤550m&&σ Δh (B 1 )≤σ ΔhT

[0100] 700m≤B 2 ≤1050m&&σ Δh (B 2 )≤σ ΔhT

[0101] where σ Δh (B 1 ) and σ Δh (B 2 ) is the height measurement error of the baseline. The main star orbit parameters and ...

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Abstract

The invention discloses an NSGA-III intelligent optimization algorithm for InSAR satellite cluster configuration. The method comprises the following steps: modeling relative motion of an InSAR satellite cluster by using an E / I vector description method; determining an optimization variable and an optimization range of a concentric ring configuration according to a base line length constraint of InSAR satellite system long and short base line matching height measurement imaging; constructing an inter-satellite distance target function, a stable target function and a high-performance target function from three angles of safety, stability and usefulness of cluster configuration; and finally, carrying out optimization solution on the three objective functions through a multi-objective NSGA-III optimization algorithm to obtain an optimal InSAR satellite cluster configuration meeting the task requirements of inter-satellite collision avoidance, configuration stability and height measurement precision. According to the multi-target intelligent optimization algorithm provided by the invention, the problem that InSAR satellite cluster optimization design relates to multi-target and multi-constraint solution is effectively solved, intelligent optimization design of a'concentric ring 'configuration of a satellite cluster is realized, and a technical basis is provided for a task of obtaining a high-precision DEM product by an InSAR satellite cluster system.

Description

technical field [0001] The invention relates to the configuration design of a satellite cluster, in particular to an InSAR satellite cluster configuration optimization design method based on the NSGA-III algorithm. Background technique [0002] Swarm satellites have received extensive attention and applications at home and abroad due to their high flexibility, short development cycle and low launch cost. The InSAR satellite cluster system can utilize the relative orbit characteristics of the member satellites to realize interferometric altimetry, high-resolution mapping and imaging, and ground dynamic target display (GMTI) functions, expanding the application scope of traditional SAR satellites. [0003] The configuration design of the InSAR swarm system needs to coordinate the contradictory indicators among various factors on the basis of fully considering the factors such as configuration stability, long and short baseline matching, measurement accuracy, and inter-satellit...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D1/10
CPCG05D1/104
Inventor 贾庆贤桂玉乐舒睿于丹吴云华高君楠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS