空间控制技术与应用（中英文）2026，Vol.52Issue(2)：56-68,13.DOI:10.3969/j.issn.1674-1579.2026.02.006
空间引力波航天器质心自引力耦合效应分析
Analysis of Center-of-Gravity-Self-Gravity Coupling Effects in Space-Based Gravitational-Wave Spacecraft
摘要
Abstract
To meet the need for fast and interpretable in-orbit evaluation of the self-gravity disturbances acting on the test masses(TMs)of space-based gravitational-wave detection spacecraft under propellant consumption-induced mass distribution changes,this paper investigates the coupling effects among the spacecraft center of mass(CG),self-gravity center(SG),and test mass(TM)under fuel-consumption conditions,and proposes a coupled fast-prediction approach.First,finite-element analyses are performed to quantify how the spacecraft geometry and the propellant-consumption-driven mass redistribution affects the SG,yielding a dataset that includes CG,SG,and related quantities.Second,piecewise linear coupling matrices for"CG-SG"and"CG-TM self-gravity"are identified,and singular value decomposition(SVD)is used to verify the near one-dimensional evolution of the CG,thereby reducing the problem to a scalar parameter.Finally,based on this scalar parameter,a piecewise cubic Hermite interpolating polynomial(PCHIP)mapping is constructed to enable rapid prediction of the SG position and the self-gravity increments at the TMs.Results show that,within the test intervals,the proposed model maintains good consistency even in fuel-consumption ranges not used for model construction:the PCHIP prediction error of the SG remains at the millimeter level,and the predicted self-gravity increments at the TMs are stable.This converts high-fidelity computations into a lightweight surrogate model suitable for online evaluation and reveals the coupling between the spacecraft CG and SG.关键词
空间引力波探测/自引力中心/质心/耦合效应/燃料消耗/快速预测Key words
space-based gravitational-wave detection/self-gravity center/center of gravity/coupling effects/propellant consumption/fast prediction分类
航空航天引用本文复制引用
王一鸣,单悌磊,张慧博,张立华,黎明..空间引力波航天器质心自引力耦合效应分析[J].空间控制技术与应用（中英文）,2026,52(2):56-68,13.基金项目
国家重点研发计划(2023YFC2205900 和 2023YFC2205902) National Key Research and Development Plan(2023YFC2205900 and 2023YFC2205902)National Key Research and Development Plan(2023YFC2205900 and 2023YFC2205902) （2023YFC2205900 和 2023YFC2205902）
