Cold-Tip Temperature Control of Space-borne SatelliteStirlingCryocooler: Mathematical Modeling and Control Investigation
Shaival H. Nagarsheth, Jiten H. Bhatt, Jayesh J. Barve

TL;DR
This paper investigates and compares advanced 2-DOF and traditional 1-DOF control strategies for precise temperature regulation of Stirling cryocoolers in space satellites, using mathematical modeling and experimental validation.
Contribution
It introduces a first-principle control-oriented model and demonstrates improved temperature control with 2-DOF feedback structures over traditional methods.
Findings
2-DOF control achieves better temperature stability.
Matlab/Simulink model effectively supports controller tuning.
Experimental results validate simulation accuracy.
Abstract
IR (Infra-Red) detectors are widely used in Space-borne remote sensing satellites. In order to achieve a high signal to noise ratio, the IR detectors need to be operated at cryogenic temperatures. Traditionally, the cryogenic cooling of these detectors is achieved using passive cooling techniques. However recent trend is to employ Stirling-cycle based miniaturized active cryocoolers. An accurate and stringent control of active cryocooler cold-tip temperature is essential to accomplish high signal & image quality from the IR detectors. This paper presents work on investigations and comparison of performance of proposed 2-DOF (2-Degrees-of-Freedom) versus traditional 1-DOF feedback-control structures for the control of cryocooler cold-tip temperature used in IR (Infra-Red) detectors of Space Satellites. Towards this, first-principle based control oriented mathematical model simulated in…
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