Auto-tuned thermal control on stratospheric balloon experiments

Susan Redmond, Steven Benton, Anthony M. Brown, Paul Clark, Christopher J. Damaren, Tim Eifler, Aurelien A. Fraisse, Mathew N. Galloway, John W. Hartley, Mathilde Jauzac, William C. Jones, Lun Li, Thuy Vy Luu, Richard J. Massey, Jacqueline McCleary, C. Barth Netterfield, Jason D. Rhodes, L. Javier Romualdez, Jürgen Schmoll, Sut Ieng Tam

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Balloon-borne experiments present unique thermal design challenges, which are a combination of those present for both space and ground experiments. Radiation and conduction are the predominant heat transfer mechanisms with convection effects being minimal and difficult to characterize at 35-40 km. This greatly constrains the thermal design options and makes predicting flight thermal behaviour very difficult. Due to the limited power available on long duration balloon flights, efficient heater control is an important factor in minimizing power consumption. SuperBIT, or the Super-Pressure Balloon-borne Imaging Telescope, aims to study weak gravitational lensing using a 0.5m modified Dall-Kirkham telescope capable of achieving 0.02' stability1 and capturing deep exposures from visible to near UV wavelengths. To achieve the theoretical stratospheric diffraction-limited resolution of 0.25',2 mirror deformation gradients must be kept to within 20 nm. The thermal environment must be stable on time scales of an hour and the thermal gradients on the telescope must be minimized. During its 2018 test-flight, SuperBIT will implement two types of thermal parameter solvers: one for post-flight characterization and one for in-flight control. The payload has 85 thermistors as well as pyranometers and far-infrared sensors which will be used post-flight to further understand heat transfer in the stratosphere. This document describes the in-flight thermal control method, which predicts the thermal circuit of components and then auto-tunes the heater PID gains. Preliminary ground testing shows the ability to control the components to within 0.01 K.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Telescopes VII
EditorsHeather K. Marshall, Jason Spyromilio
PublisherSPIE
ISBN (Electronic)9781510619531
DOIs
StatePublished - Jan 1 2018
EventGround-Based and Airborne Telescopes VII 2018 - Austin, United States
Duration: Jun 10 2018Jun 15 2018

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10700
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherGround-Based and Airborne Telescopes VII 2018
CountryUnited States
CityAustin
Period6/10/186/15/18

Fingerprint

Thermal Control
Upper atmosphere
Balloon
Balloons
balloons
flight
telescopes
heaters
Experiment
Telescopes
Telescope
pyranometers
Experiments
heat transfer
Flight Control
balloon flight
flight control
thermal environments
gradients
thermistors

Keywords

  • auto-tune
  • balloon-borne
  • PID gains
  • thermal control
  • visible-to-near-UV/stratosphere
  • wide field

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Redmond, S., Benton, S., Brown, A. M., Clark, P., Damaren, C. J., Eifler, T., ... Tam, S. I. (2018). Auto-tuned thermal control on stratospheric balloon experiments. In H. K. Marshall, & J. Spyromilio (Eds.), Ground-Based and Airborne Telescopes VII [107005R] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10700). SPIE. https://doi.org/10.1117/12.2312339

Auto-tuned thermal control on stratospheric balloon experiments. / Redmond, Susan; Benton, Steven; Brown, Anthony M.; Clark, Paul; Damaren, Christopher J.; Eifler, Tim; Fraisse, Aurelien A.; Galloway, Mathew N.; Hartley, John W.; Jauzac, Mathilde; Jones, William C.; Li, Lun; Luu, Thuy Vy; Massey, Richard J.; McCleary, Jacqueline; Netterfield, C. Barth; Rhodes, Jason D.; Romualdez, L. Javier; Schmoll, Jürgen; Tam, Sut Ieng.

Ground-Based and Airborne Telescopes VII. ed. / Heather K. Marshall; Jason Spyromilio. SPIE, 2018. 107005R (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10700).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Redmond, S, Benton, S, Brown, AM, Clark, P, Damaren, CJ, Eifler, T, Fraisse, AA, Galloway, MN, Hartley, JW, Jauzac, M, Jones, WC, Li, L, Luu, TV, Massey, RJ, McCleary, J, Netterfield, CB, Rhodes, JD, Romualdez, LJ, Schmoll, J & Tam, SI 2018, Auto-tuned thermal control on stratospheric balloon experiments. in HK Marshall & J Spyromilio (eds), Ground-Based and Airborne Telescopes VII., 107005R, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10700, SPIE, Ground-Based and Airborne Telescopes VII 2018, Austin, United States, 6/10/18. https://doi.org/10.1117/12.2312339
Redmond S, Benton S, Brown AM, Clark P, Damaren CJ, Eifler T et al. Auto-tuned thermal control on stratospheric balloon experiments. In Marshall HK, Spyromilio J, editors, Ground-Based and Airborne Telescopes VII. SPIE. 2018. 107005R. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.2312339
Redmond, Susan ; Benton, Steven ; Brown, Anthony M. ; Clark, Paul ; Damaren, Christopher J. ; Eifler, Tim ; Fraisse, Aurelien A. ; Galloway, Mathew N. ; Hartley, John W. ; Jauzac, Mathilde ; Jones, William C. ; Li, Lun ; Luu, Thuy Vy ; Massey, Richard J. ; McCleary, Jacqueline ; Netterfield, C. Barth ; Rhodes, Jason D. ; Romualdez, L. Javier ; Schmoll, Jürgen ; Tam, Sut Ieng. / Auto-tuned thermal control on stratospheric balloon experiments. Ground-Based and Airborne Telescopes VII. editor / Heather K. Marshall ; Jason Spyromilio. SPIE, 2018. (Proceedings of SPIE - The International Society for Optical Engineering).
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