Robust Control of a Two-Terminal Cryogenic Current Comparator

Author

Bierzychudek, Marcos E. ; Sanchez-Pena, Ricardo S. ; Tonina, A.

Author_Institution

Electr. Div., Inst. Nac. de Tecnol. Ind., San Martin, Argentina

Volume

62

Issue

6

fYear

2013

fDate

Jun-13

Firstpage

1736

Lastpage

1742

Abstract

A digital H∞ controller for a two-terminal cryogenic current comparator is designed. To this end, a set of mathematical models covering the actual system is proposed. Simulation results compare the open- and closed-loop systems based on the proposed controller and the traditional integral control. According to these results, the new controller can significantly reduce the noise in the superconducting quantum interference device sensor.

Keywords

H^∞ control; SQUIDs; closed loop systems; cryogenic electronics; current comparators; digital control; electric current control; electric sensing devices; mathematical analysis; robust control; closed-loop system; digital H_∞ controller; integral control; mathematical model; noise reduction; open-loop system; robust control; superconducting quantum interference device sensor; two-terminal cryogenic current comparator; Inductance; Resistors; Resonant frequency; SQUIDs; Transfer functions; Uncertainty; Windings; $H$-infinity control; Current comparators; current measurement; resistance measurements; superconducting quantum interference device (SQUID);

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2013.2240954

Filename

6466382