AI 中文总结
该研究测量了开环与闭环系统中窄带超导谐振器的有质动力不稳定性，提出分析方案探究开环稳定性与机械参数的关系，证实高带宽下有质动力振荡可降低不稳定性阈值，重申I/Q控制的优越性并揭示相位控制器的扰动串扰放大效应。
AI 中文摘要
本工作报告了开环与闭环控制系统中窄带同轴谐振器的有质动力不稳定性测量结果。我们提出了一种分析方案，将用于后续研究以探究开环稳定性对机械参数的依赖性。采用分析与仿真模型预测半波谐振器中振荡不稳定性的起始条件，该谐振器配备用于振幅与相位稳定的主动扰动抑制控制。我们证实，在高振幅控制器带宽下，有质动力振荡可通过高次谐波与控制器频率响应耦合，从而降低振荡不稳定性的阈值。我们重申了同相/正交（I/Q）分量控制在预防振荡不稳定性方面的优越性，并阐明相位控制器如何放大振幅与相位控制中扰动的串扰；在存在大扰动的情况下，该效应可引发I/Q控制中不存在的不稳定性。
英文摘要
In this work, we present measurements of ponderomotive instabilities in narrow-band, coaxial resonators in open and closed control loop systems. We show an analytical scheme we will use in future studies to examine the dependency of open loop stability on mechanical parameters. Analytical and simulation models are used to predict the onset of the oscillatory instability in half wave resonators with active disturbance rejection control for amplitude and phase stabilization. We demonstrate that for high amplitude controller bandwidths, ponderomotive oscillations can couple with the controller frequency response via higher harmonics and lower the threshold for the oscillatory instability. We reaffirm the superiority of in-phase/quadrature $(I/Q)$ component control in regards to preventing the oscillatory instability, and show how the phase controller can amplify the crosstalk of disturbances in amplitude and phase control. In cases with large disturbances, this effect can lead to instabilities not present in $I/Q$ control.
