Original title: Fuzzy pressure controller for helium bath cryostats
Authors: Hanzelka, Pavel ; Jura, P.
Document type: Papers
Conference/Event: CRYOGENICS 2002, Praha (CZ), 2002-04-23 / 2002-04-26
Year: 2002
Language: eng
Abstract: 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.
Keywords: fuzzy controller; helium cryopump; pressure controller
Project no.: CEZ:AV0Z2065902 (CEP), GA101/00/0028 (CEP), GA102/01/1485 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: Proceedings of 7th Cryogenics IIR international conference, ISSN 0151-1637

Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0101089

Permalink: http://www.nusl.cz/ntk/nusl-29532


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Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers