调试 MAPS 自适应副镜：执行器控制、PID 调试、功率谱与故障诊断
Tuning the MAPS Adaptive Secondary Mirror: Actuator Control, PID Tuning, Power Spectra and Failure Diagnosis
AI总结：
本文介绍了MAPS自适应副镜执行器的闭环PID与前馈控制方法，通过功率谱分析进行PID调试与故障诊断，成功降低了镜面延迟并提升了成像质量。
摘要：
MMT 自适应光学系外行星表征系统（MAPS）目前处于工程阶段，正在亚利桑那州南部霍普金斯山的 MMT 望远镜上进行在轨测试。MAPS 自适应副镜的执行器由闭环修正 PID 控制律和开环前馈律控制，两者的结合实现了更快的执行器响应时间。实现副镜性能目标的关键要素之一是 PID 增益调试过程。首先，我们简要讨论了 MAPS ASM 及其执行器的设计。接着，我们描述了执行器位置控制系统和控制律。然后，我们讨论了使 ASM 调试变得困难的一些问题。随后，我们概述了在调试执行器控制器方面的初步尝试，并讨论了将执行器位置功率谱用于调试以及确定单个执行器的健康和故障状态。最后，我们展示了最新一轮调试配置试验的结果，这些结果成功降低了镜面延迟，增加了可操作的镜面模式并改善了图像 PSF。
英文摘要：
The MMT Adaptive optics exoPlanet characterization System (MAPS) is currently in its engineering phase, operating on-sky at the MMT Telescope on Mt. Hopkins in southern Arizona. The MAPS Adaptive Secondary Mirror's actuators are controlled by a closed loop modified PID control law and an open loop feed-forward law, which in combination allows for faster actuator response time. An essential element of achieving the secondary's performance goals involves the process of PID gain tuning. To start, we briefly discuss the design of the MAPS ASM and its actuators. We then describe the actuator positional control system and control law. Next, we discuss a few of the issues that make ASM tuning difficult. We then outline our initial attempts at tuning the actuator controllers and discuss the use of actuator positional power spectra for both tuning and determining the health and failure states of individual actuators. We conclude by presenting the results of our latest round of tuning configuration trials, which have been successful at decreasing mirror latency, increasing operational mirror modes and improving image PSF.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
