低地球軌道衛星群の可視性を遺伝子アルゴリズムで最適化して,ナビゲーションの可能性を向上させる
Chao Qin1,2, Yanbin Gao3, Yihuan Wang4
1College of Intelligent Systems Science and Engineering, Harbin Engineering University, Harbin, 150001, China. max_qinchao@163.com.
Scientific reports
|August 21, 2025
まとめ
この研究は,アダプティブパラレル遺伝子アルゴリズム (GA) を使用して低地軌道衛星の可視性を高めます. 最適化されたフレームワークは,ナビゲーションの精度とダイナミックな強さを向上させ,他の方法よりも優れています.
科学分野:
- 衛星 の 構成
- 最適化アルゴリズム
- 軌道力学
背景:
- 低地軌道 (LEO) 衛星群は,可視性の最適化課題に直面しています.
- ナビゲーションの精度とダイナミックな安定性を確保することは,LEOの星座にとって非常に重要です.
- J2 波動の影響は,長期にわたるコンステレーション性能に影響します.
研究 の 目的:
- LEO衛星群の可視性最適化のための強化された枠組みを提案する.
- 衛星群のナビゲーションの精度とダイナミックな安定性を向上させる.
- 次世代のグローバル・ナビゲーション・サテライト・システム (GNSS) の技術的基盤を提供すること.
主な方法:
- アダプティブパラレル遺伝子アルゴリズム (GA) フレームワークを開発した.
- 極,ウォーカー,正方形の円軌道を統合したハイブリッド星座を設計した.
- J2の混乱を補うためにダイナミック・リラクゼーション・ファクター (γ) を組み込みました.
- 集団の多様性エントロピーを用いた適応パラメータの調整を実施した.
- マルチコアアーキテクチャの平行フィットネス評価戦略を利用した.
- 簡素化されたフィットネス機能の設計を採用した.
主要な成果:
- 100衛星のシナリオで平均14.3の可視衛星を達成し,D-NSDEを3.6%上回った.
- 位置精度 (PDOP) を2.3に減らし,全体の95.6%をカバーしました.
- "つの衛星の故障後に3.5%のカバレッジの減少で高い強度を示した.
- 軌道の乱れが10年続いた後も 94.8%のカバーを維持した
- 500〜1000の衛星シナリオで,210秒未満の収束時間で,PDOP ≤2.8を達成した.
- 粒子群の最適化と ダイナミック・ノン・ドミナント・ソート・ディファレンシャル・エボリューションを 優越した.
結論:
- 提案されたアダプティブパラレルGAフレームワークは,LEO衛星群の可視性を効果的に最適化します.
- フレームワークは優れたナビゲーションの精度,ダイナミックな強度,計算効率を提供します.
- この研究は,将来のGNSS開発に重要な進展をもたらします.
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