CN-121997082-A - Method and equipment for evaluating comprehensive application capability of satellite constellation based on cluster analysis

CN121997082ACN 121997082 ACN121997082 ACN 121997082ACN-121997082-A

Abstract

The invention discloses a satellite constellation comprehensive application capability assessment method and device based on cluster analysis, which relate to the technical field of satellite constellation comprehensive application capability assessment, and mainly comprise the following steps: the method comprises the steps of constructing a constellation performance index system based on satellite constellation comprehensive capability characteristics, carrying out quantization and standardization treatment on the constellation performance index system, carrying out aggregation by utilizing pearson correlation coefficients and significance judgment indexes, obtaining a clustering comprehensive index system by utilizing variation coefficients according to clustering results, screening out an effective clustering comprehensive index system based on a judgment criterion of degree of order, and obtaining system efficiency by utilizing a hierarchical analysis method and an entropy weight method. By implementing the satellite constellation comprehensive application capability assessment method based on cluster analysis, the constellation comprehensive performance can be accurately assessed, and the discrimination capability of alternative schemes is improved.

Inventors

QI XINHU
ZHANG KUN
DAI GUANGMING
WANG MAOCAI
CHEN XIAOYU
PENG LEI
SONG ZHIMING
CHEN ZHAN
CHEN HAOYI

Assignees

航天恒星科技有限公司
中国地质大学（武汉）

Dates

Publication Date: 20260508
Application Date: 20251222

Claims (10)

1. The satellite constellation comprehensive application capability assessment method based on cluster analysis is characterized by comprising the following steps of: S1, constructing a constellation performance index system based on satellite constellation comprehensive capability characteristics; s2, carrying out quantization and normalization treatment on the constellation performance index system to obtain a treated constellation performance index system; s3, aggregating the processed constellation performance index system by using the Pearson correlation coefficient and the significance evaluation index to obtain an aggregated constellation performance index system; S4, clustering the aggregated constellation performance index system to obtain a clustering result; s5, obtaining a clustering comprehensive index system by utilizing a variation coefficient according to the clustering result; S6, judging the effectiveness and the availability of the clustering comprehensive index system based on a judgment criterion of the degree of order, and screening out an effective clustering comprehensive index system; And S7, obtaining the system efficiency by using a hierarchical analysis method and an entropy weight method according to the clustering comprehensive index system.
2. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1 is characterized in that the constellation performance index system comprises an timeliness index, a coverage index, a resource utilization index and a reliability index, wherein the timeliness index comprises a coverage time percentage, a maximum revising period, an average response time length, a single-turn working time, a single working time and a visible satellite time length, the coverage index comprises an area accumulated coverage rate, an area overlapping rate, an average coverage area percentage, an area coverage weight, an observation window number and an observation coverage elevation angle, the resource utilization index comprises a resource utilization rate such as a maximum single-satellite occupancy rate, a minimum single-satellite occupancy rate, a satellite system average occupancy rate and the like, and the reliability index comprises equipment maintainability, equipment standardization degree, a constellation in-orbit operation satellite number, a constellation standby satellite number and a DOP value.
3. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1, wherein the normalization process is a normalization process.
4. A method for evaluating the comprehensive application capability of a satellite constellation based on cluster analysis according to claim 3, wherein the normalization process is a z-score method, such as the formula: , Wherein, the Representation of the first pair Individual index As a result of the normalization, The average value of the data set is represented, Representing the standard deviation of the data set, To set the data size.
5. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1, wherein the calculation formula of the pearson correlation coefficient is as follows: , Wherein, the Representing variable data sets And Pearson correlation coefficient of (b); representing the expected value.
6. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1, wherein the calculation formula of the pearson correlation coefficient is as follows: , Wherein, the Is a significance judgment index; Is a correlation coefficient; representing the dimension of the index feature vector.
7. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1, wherein the calculation formula of the variation coefficient is: , Wherein, the Is the first in the cluster Variation coefficients of the individual indicators; Is the first in the cluster Data standard deviation of each index; Is the first in the cluster The data average value of the individual indicators is calculated, Is the number of indexes in the cluster.
8. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1, wherein the calculation formula of the degree of order is: , Wherein, the Is the degree of order; ={ 1 , 2 , ... , the experimental results evaluated by the original index set are ordered, The number of the index in the sequence a is represented, ; Ordering results based on a cluster comprehensive index system; Is based on sequence Based on A sequence chaotic judgment function; And Respectively is Middle (f) And (d) The elements.
9. The method for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis according to claim 1, wherein the calculation formula of the system efficiency is: , , , Wherein, the Representation scheme Is a system performance of (1); Representation scheme Is used to determine the performance value of the (c) for the (c), , ,..., For each efficacy index value, n represents the number of efficacy indexes of the scheme; Combining weights for subjective and objective; Is the proportion of subjective and objective weights in analysis; the number of subjective weighting methods; The number of objective weighting methods; And Respectively represent Subjective weighting method The weights respectively occupied by the objective weighting method are required to be satisfied ; Represent the first The first calculated by the subjective evaluation method A personal index weight; Represent the first Objective weight assignment method And (5) the index weight.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the cluster analysis based satellite constellation comprehensive application capability assessment method according to any of claims 1-9 when the computer program is executed.

Description

Method and equipment for evaluating comprehensive application capability of satellite constellation based on cluster analysis Technical Field The invention relates to the technical field of satellite constellation comprehensive application capability assessment, in particular to a method and equipment for evaluating satellite constellation comprehensive application capability based on cluster analysis. Background With the rapid increase of the number of global satellites, satellite constellation systems are increasingly used in the fields of navigation, remote sensing, communication and the like. The satellite constellation system is generally composed of a plurality of satellites, has the characteristics of wide coverage, continuous monitoring and the like, and plays an important role in various fields such as national defense, weather, geographic information and the like. However, it is a current technical difficulty how to scientifically and comprehensively evaluate the comprehensive application capability of satellite constellations. Conventional constellation performance assessment has certain limitations. In the aspect of efficiency evaluation methods, classical methods such as analytic hierarchy process, fuzzy synthesis method and the like determine that the factors of weights are too single, and for classical combined weight evaluation methods, subjective and objective factors are comprehensively considered, but the weights of the subjective and objective methods are assigned according to subjective experiences, so that the defect of too much dependence on the subjective factors exists. Thus, there is a need for a more efficient method for performance assessment of satellite constellations. Disclosure of Invention The invention aims to provide a satellite constellation comprehensive application capability assessment method based on cluster analysis, which can accurately assess the constellation comprehensive performance and improve the distinguishing capability of alternative schemes. The invention provides a satellite constellation comprehensive application capability assessment method based on cluster analysis, which comprises the following steps: S1, constructing a constellation performance index system based on satellite constellation comprehensive capability characteristics; s2, carrying out quantization and normalization treatment on the constellation performance index system to obtain a treated constellation performance index system; s3, aggregating the processed constellation performance index system by using the Pearson correlation coefficient and the significance evaluation index to obtain an aggregated constellation performance index system; S4, clustering the aggregated constellation performance index system to obtain a clustering result; s5, obtaining a clustering comprehensive index system by utilizing a variation coefficient according to the clustering result; S6, judging the effectiveness and the availability of the clustering comprehensive index system based on a judgment criterion of the degree of order, and screening out an effective clustering comprehensive index system; And S7, obtaining the system efficiency by using a hierarchical analysis method and an entropy weight method according to the clustering comprehensive index system. The invention also provides a computer device comprising a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the satellite constellation comprehensive application capability assessment method based on cluster analysis when executing the computer program. The method and the device for evaluating the comprehensive application capability of the satellite constellation based on cluster analysis have the following beneficial effects: Aiming at the satellite constellation as a complex comprehensive system, the invention has the advantages of rich task types and strong performance, and the characteristic of larger scale of performance indexes generated by executing the tasks, the invention provides a complete performance evaluation index system which is suitable for comprehensive performance evaluation of the constellation based on the evaluation index structure of the tasks covering multiple types of constellation tasks by researching and analyzing the types and the characteristics of the constellation tasks, clusters and synthesizes the constellation indexes which are researched and oriented to the tasks according to the correlation coefficient by a clustering algorithm, eliminates the similar indexes and reduces the scale, clusters variables with higher similarity by using the Pearson correlation coefficient, extracts typical indexes with representativeness therefrom, provides an effectiveness research method based on the order, makes improvement on the scientificity and the usability of the index system by combining the advantages of the subjective evaluati