Mircoprocessor control of cryogen pressure
The results of the use of microprocessor based controller to control the pressure of cryogenic helium are shared. The dewar was designed to provide a supply of ScHe to cool an experimental heat load while maintaining the pressure of the He with a controlled heat leak. This method of pressurization was chosen because of its high reliability and because it would be able to provide pressurization at the required He flow rate of a few grams per second. Photos of the controller and SC He dewar, along with schematic drawings of the MBC experiment are shown. A block diagram of the MBC and a control program flow chart are also presented. Predicted performance and transient response are charted. The microprocessor based control can be implemented at very low memory and cycle time costs. Applications will be of great importance to the success of programs like the Shuttle Infrared Telescope Facility and Cryogenic Fluid Management Experience.
- Research Organization:
- Beech Aircraft Corp., Boulder, CO
- OSTI ID:
- 6262997
- Report Number(s):
- CONF-810835-
- Journal Information:
- Adv. Cryog. Eng.; (United States), Journal Name: Adv. Cryog. Eng.; (United States) Vol. 27; ISSN ACYEA
- Country of Publication:
- United States
- Language:
- English
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