AI 中文总结
针对MagAO-X极端AO仪器，设计低成本模块化加速度计遥测系统，识别望远镜振动源并分析其与WFE的相关性，为AO系统预测控制提供基础。
AI 中文摘要
机械振动是自适应光学（AO）系统中残余波前误差（WFE）的重要来源，限制了高对比度成像仪器的性能。本文介绍了6.5米麦哲伦克莱望远镜上MagAO-X极端AO仪器的低成本模块化加速度计遥测系统的设计与在轨部署情况，该系统由压电加速度计和基于树莓派（Raspberry Pi）的采集系统组成，能以微秒级计时稳定性将同步数据传输至实时控制计算机。该系统用于识别主要望远镜振动源并量化其与AO遥测的耦合关系，发现多个窄带模式源自主镜乙二醇泵、副镜致动系统及望远镜自动聚焦系统等子系统。同步加速度计与波前传感器遥测的相干分析显示，约三分之一的残余倾斜WFE与结构振动相关，表明加速度计遥测为未来预测控制的实现提供了有前景的基础。这些结果证明，低成本加速度计遥测为当前及未来AO系统的振动识别提供了实用方法，并为预测控制奠定了基础。
英文摘要
Mechanical vibrations are a significant source of residual wavefront error (WFE) in adaptive optics (AO) systems, limiting the performance of high-contrast imaging instruments. We present the design and on-sky deployment of a low-cost, modular accelerometer telemetry system for the MagAO-X extreme AO instrument on the 6.5 m Magellan Clay Telescope, consisting of piezoelectric accelerometers and a Raspberry Pi-based acquisition system that streams synchronized data to the real-time control computer with microsecond-level timing stability. The system is used to identify dominant telescope vibration sources and quantify their coupling to AO telemetry, revealing that several narrow-band modes originate from subsystems including the primary mirror glycol pump, secondary mirror actuation system, and telescope autofocus system. Coherence analysis between the synchronized accelerometer and wavefront sensor telemetry demonstrates that approximately one-third of the residual tip and tilt WFE is correlated with structural vibrations, indicating that accelerometer telemetry provides a promising foundation for future predictive control implementations. These results demonstrate that low-cost accelerometer telemetry provides a practical approach for vibration identification and a foundation for predictive control in current and future AO systems.
Comments13 pages, 9 figures, proceeding of SPIE Astronomical Telescopes + Instrumentation 2026 (Paper No. 14150-87)
