Design and control of a thermal stabilizing system for a MEMS optomechanical uncooled infrared imaging camera

Jongeun Choi, Joji Yamaguchi, Simon Morales, Roberto Horowitz, Yang Zhao, Arunava Majumdar

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In this paper, the design and control of a thermal stabilizing system for an optomechanical uncooled infrared (IR) imaging camera is presented, which uses an array of MEMS bimaterial cantilever beams to sense an IR image source. A one-dimensional lumped parameter model of the thermal stabilization system was derived and experimentally validated. A model-based discrete time linear quadratic gaussian regulator (LQGR) control scheme, with a stochastic ambient noise model, was implemented. The control system incorporates a reference model, which generates desired reference temperature trajectory, and integral action to respectively diminish overshoots and achieve zero steady state error in closed loop. Simulation results show that the designed LQGR is able to enhance ambient temperature low frequency disturbance attenuation by more than 50 dB. The control system is able to regulate the focal-plane array (FPA) temperature with a standard deviation of about 100 μK, in spite of the fact that the temperature measurement noise has a standard deviation of 1 mK. Noise analysis results for the present stage of the optomechanical IR imaging system are summarized. The noise equivalent temperature difference (NETD) of the current stage of the IR camera system can achieve about 200 mK.

Original languageEnglish
Pages (from-to)132-142
Number of pages11
JournalSensors and Actuators, A: Physical
Volume104
Issue number2
DOIs
Publication statusPublished - 2003 Apr 15

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Infrared imaging
microelectromechanical systems
MEMS
Cameras
cameras
regulators
standard deviation
Infrared radiation
Control systems
Temperature
Focal plane arrays
cantilever beams
Cantilever beams
focal plane devices
Temperature measurement
Imaging systems
ambient temperature
temperature measurement
temperature gradients
disturbances

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

Choi, Jongeun ; Yamaguchi, Joji ; Morales, Simon ; Horowitz, Roberto ; Zhao, Yang ; Majumdar, Arunava. / Design and control of a thermal stabilizing system for a MEMS optomechanical uncooled infrared imaging camera. In: Sensors and Actuators, A: Physical. 2003 ; Vol. 104, No. 2. pp. 132-142.
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Design and control of a thermal stabilizing system for a MEMS optomechanical uncooled infrared imaging camera. / Choi, Jongeun; Yamaguchi, Joji; Morales, Simon; Horowitz, Roberto; Zhao, Yang; Majumdar, Arunava.

In: Sensors and Actuators, A: Physical, Vol. 104, No. 2, 15.04.2003, p. 132-142.

Research output: Contribution to journalArticle

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