发表机构
School of Energy Science and Engineering, Harbin Institute of Technology（哈尔滨工业大学能源科学与工程学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
该研究分解霍尔推力器羽流探针信号，发现残余波动在高频段占主导，可重复呼吸波形主导呼吸谐波双相干结构，为相关谱分析提供了依据。
AI 中文摘要
霍尔推力器羽流探针信号中的高频功率可源于可重复呼吸波形的谐波以及该波形附近的波动，这使得谱分析变得复杂。我们在某一工作条件下，对20个依次采样的探针对几何结构的197组配对记录进行分解，通过同一几何结构的其他记录估计每个相位条件波形。各几何结构的中位数显示，在0.2-0.5 MHz和0.5-1 MHz频段中，残余功率分别占测量功率的87.1%和99.7%。然而，可重复波形再现了主要的呼吸双相干结构。去除波形后，残余功率仍受呼吸相位调制，在所有20个几何结构中，两个频段的残余功率均超过特定几何结构的95百分位循环移位阈值。残余双相干性远弱于测量信号的双相干性，但在197组记录中的195组中超过了特定记录的随机相位阈值。精确分量展开进一步表明，在接近第二呼吸谐波的固定50-80 kHz频段内，全波形项主导了指定的带符号三阶统计量。这些结果区分了评估频段内的带功率分配与谐波组织。该归因针对未校准的探针链信号，未识别出不同的物理模式或测量能量转移率。这些发现促使在将呼吸谐波双相干性解释为残余波动间相互作用的证据之前，需评估可重复波形的贡献。
英文摘要
Higher-frequency power in Hall-thruster plume-probe signals can arise from both harmonics of a repeatable breathing waveform and fluctuations about it, complicating spectral interpretation. We decompose 197 paired records from 20 sequentially sampled probe-pair geometries at one operating condition, estimating each phaseconditioned waveform from other records at the same geometry. The residual accounts for 87.1% and 99.7% of measured power in the 0.2-0.5 and 0.5-1 MHz bands, respectively, as medians across geometries. The repeatable waveform, however, reproduces the principal breathing-harmonic bicoherence structure. Residual power remains modulated by breathing phase after waveform removal, exceeding geometry-specific 95thpercentile circular-shift thresholds in both bands at all 20 geometries. Residual bicoherence is substantially weaker than that of the measured signal but exceeds record-specific random-phase thresholds in 195 of 197 records. An exact component expansion further shows that the all-waveform term dominates a specified signed third-order statistic over the fixed 50-80 kHz band near the second breathing harmonic. These results distinguish band-power allocation from harmonic organization within the evaluated frequency ranges. The attribution concerns uncalibrated probe-chain signals and does not identify distinct physical modes or measure energy-transfer rates. The findings motivate assessing repeatable-waveform contributions before interpreting breathing-harmonic bicoherence as evidence of interactions among residual fluctuations.
