Title :
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
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);
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2013.2240954
