Experiment-Based Design of Stirling Cryocooler Compressor Using Response-Controlled Testing

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dc.authorid0000-0002-6253-7597
dc.authorid0000-0001-9083-7549
dc.contributor.authorGucyilmaz Cetin, Suna
dc.contributor.authorKaraagacli, Taylan
dc.contributor.authorErtas, Ahmet H.
dc.date.accessioned2026-02-08T15:16:03Z
dc.date.available2026-02-08T15:16:03Z
dc.date.issued2025
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractFlexure-based Stirling cryocooler compressors are a critical technology in providing cryogenic temperatures in various advanced engineering fields, such as aerospace, defense, and medical imaging. The most challenging problem in the design of this type of compressor is achieving a precise alignment that preserves small gaps between the components moving relative to each other and avoids severe friction and wear. This paper introduces a novel experimental procedure for designing Stirling cryocooler compressors, leveraging a recently developed nonlinear experimental modal analysis method known as response-controlled stepped-sine testing (RCT). The alignment in a compressor prototype was significantly improved in light of a series of RCT with base excitation. The enhanced compressor design was subsequently validated though a series of constant-current tests, which confirmed the elimination of the sticking/locking phenomenon observed in the initial design. Furthermore, an indirect harmonic force surface (HFS)-based approach proposed for weakly nonlinear systems was extended to identify the high and nonlinear damping (up to a 65% hysteretic modal damping ratio) observed in the enhanced compressor design due to excessive friction. As another contribution, it was shown that the extrapolation of the HFS gives accurate results in the prediction of the nonlinear modal parameters at response levels where no experimental data are available. In light of these findings, it was concluded that the enhanced design needs further design modifications to further decrease the friction and wear between the moving parts. Overall, this study provides valuable insights for designing cryocooler compressors, with implications for aerospace and medical applications.
dc.identifier.doi10.3390/vibration8010004
dc.identifier.issn2571-631X
dc.identifier.issue1
dc.identifier.scopus2-s2.0-105001109239
dc.identifier.scopusqualityQ2
dc.identifier.urihttps://doi.org/10.3390/vibration8010004
dc.identifier.urihttps://hdl.handle.net/20.500.12885/6096
dc.identifier.volume8
dc.identifier.wosWOS:001453125000001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherMdpi
dc.relation.ispartofVibration
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzWOS_KA_20260207
dc.subjectcryocooler compressor
dc.subjectnonlinear experimental modal analysis
dc.subjectresponse-controlled testing
dc.subjectstrong nonlinear damping
dc.subjectharmonic force surface
dc.titleExperiment-Based Design of Stirling Cryocooler Compressor Using Response-Controlled Testing
dc.typeArticle

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