Publication detail

Fuzzy pressure controller for helium bath cryostat

HANZELKA, P., JURA, P.

Original Title

Fuzzy pressure controller for helium bath cryostat

Type

conference paper

Language

English

Original Abstract

The amount of the vapours leaving the internal vessel of a bath cryostat depends not only on the heat input of this vessel, but also on the pressure changes in the vessel. This effect is inconsiderable in most cases but it cannot be neglected if the evaporation rate of a low loss helium cryostat is measured. Pressure stability higher than 10 Pa/h is necessary for precise measurements. A pressure controller fulfilling this requirement was designed and tested. It consists of a 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 deviation was preferred to the reaction speed. The operational properties of the controller were verified at the tests of a small helium cryopump.

Key words in English

low loss helium cryostat, pressure stability, pressure controller, fuzzy controller

Authors

HANZELKA, P., JURA, P.

RIV year

2002

Released

15. 4. 2002

Location

Praha

ISBN

0151-1637

Book

The Seventh IIR International Conference CRYOGENICS’2002, ICARIS Ltd., Praha 2002, Czech republic, ISSN 0151-1637,

Pages from

53

Pages to

55

Pages count

3

URL

knihovna UPT AV Brno, Královopolská

BibTex

@inproceedings{BUT5062,
  author="Pavel {Hanzelka} and Pavel {Jura}",
  title="Fuzzy pressure controller for helium bath cryostat",
  booktitle="The Seventh IIR International Conference CRYOGENICS’2002, ICARIS Ltd., Praha 2002, Czech republic, ISSN 0151-1637,",
  year="2002",
  pages="3",
  address="Praha",
  isbn="0151-1637",
  url="knihovna UPT AV Brno, Královopolská"
}