Název:
Fuzzy pressure controller for helium bath cryostats
Autoři:
Hanzelka, Pavel ; Jura, P. Typ dokumentu: Příspěvky z konference Konference/Akce: CRYOGENICS 2002, Praha (CZ), 2002-04-23 / 2002-04-26
Rok:
2002
Jazyk:
eng
Abstrakt: Pressure stability of about 10 Pa/h is necessary for precise measurementsof the helium evaporation rate of the low loss cryostats. A pressure controller fulfilling this requirement was designed and tested. It consists ofan absolute pressure sensor, an electronic fuzzy controller and a proportional electromagnetic valve. Computer simulation of the system behaviour was used for the controller tuning. The minimization of the final deviationwas preferred to the reaction speed. The operational properties of the controller were verified at the tests of a helium dewar. The controller was utilised at the development of a small helium cryopump.
Klíčová slova:
fuzzy controller; helium cryopump; pressure controller Číslo projektu: CEZ:AV0Z2065902 (CEP), GA101/00/0028 (CEP), GA102/01/1485 (CEP) Poskytovatel projektu: GA ČR, GA ČR Zdrojový dokument: Proceedings of 7th Cryogenics IIR international conference, ISSN 0151-1637
Instituce: Ústav přístrojové techniky AV ČR
(web)
Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0101089