Fuzzy pressure controller for helium bath cryostat

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F02%3APU27910" target="_blank" >RIV/00216305:26220/02:PU27910 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Fuzzy pressure controller for helium bath cryostat
Original language description
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, ann 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.
Czech name
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Czech description
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Project
<a href="/en/project/GA102%2F01%2F1485" target="_blank" >GA102/01/1485: Enviroment for development, modelling and application of heterogenous systems</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2002
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
The Seventh IIR International Conference CRYOGENICS?2002, ICARIS Ltd., Praha 2002, Czech republic, ISSN 0151-1637,
ISBN
0151-1637
ISSN
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e-ISSN
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Number of pages
3
Pages from-to
53-55
Publisher name
Neuveden
Place of publication
Praha
Event location
Praha
Event date
Apr 23, 2002
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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