@inproceedings{9fc1f2b410444311a1ca167e60898a42,
title = "Tuning the MAPS adaptive secondary mirror: actuator control, PID tuning, power spectra, and failure diagnosis",
abstract = "The MMT Adaptive optics exoPlanet characterization System (MAPS) is currently in its engineering phase, operating on sky at the MMT Telescope. The MAPS Adaptive Secondary Mirror's actuators are controlled by a closed loop modified P ID c ontrol l aw a nd a n o pen l oop f eed f orward l aw, w hich i n c ombination a llows 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 a ctuators. 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 t rials, w hich have been successful at decreasing mirror latency, increasing operational mirror modes and improving image PSF.",
keywords = "adaptive optics, adaptive secondary, AO, ASM, MMT, PID, tuning",
author = "Johnson, {Jess A.} and Amali Vaz and Manny Montoya and Morzinski, {Katie M.} and Jennifer Patience and Suresh Sivanandam and Guido Brusa and Olivier Durney and Andrew Gardner and Olivier Guyon and Lori Harrison and Ron Jones and Jarron Leisenring and Jared Males and Bianca Payan and Lauren Perez and Yoav Rotman and Jacob Taylor and Dan Vargas and Grant West",
note = "Publisher Copyright: {\textcopyright} 2024 SPIE; Unconventional Imaging, Sensing, and Adaptive Optics 2024 ; Conference date: 19-08-2024 Through 23-08-2024",
year = "2024",
doi = "10.1117/12.3027714",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Dolne, {Jean J.} and Bose-Pillai, {Santasri R.} and Matthew Kalensky",
booktitle = "Unconventional Imaging, Sensing, and Adaptive Optics 2024",
}