DocumentCode :
1262477
Title :
Series-Parallel Six-Element Synthesis of Biquadratic Impedances
Author :
Jiang, Jason Zheng ; Smith, Malcolm C.
Author_Institution :
Dept. of Eng., Univ. of Cambridge, Cambridge, UK
Volume :
59
Issue :
11
fYear :
2012
Firstpage :
2543
Lastpage :
2554
Abstract :
The object of this paper is to give a complete treatment of the realizability of positive-real biquadratic impedance functions by six-element series-parallel networks comprising resistors, capacitors, and inductors. This question was studied but not fully resolved in the classical electrical circuit literature. Renewed interest in this question arises in the synthesis of passive mechanical impedances. Recent work by the authors has introduced the concept of a regular positive-real functions. It was shown that five-element networks are capable of realizing all regular and some (but not all) nonregular biquadratic positive-real functions. Accordingly, the focus of this paper is on the realizability of nonregular biquadratics. It will be shown that the only six-element series-parallel networks which are capable of realizing nonregular biquadratic impedances are those with three reactive elements or four reactive elements. We identify a set of networks that can realize all the nonregular biquadratic functions for each of the two cases. The realizability conditions for the networks are expressed in terms of a canonical form for biquadratics. The nonregular realizable region for each of the networks is explicitly characterized.
Keywords :
network synthesis; capacitors; electrical circuit; five-element networks; inductors; nonregular biquadratic positive-real functions; passive mechanical impedance synthesis; positive-real biquadratic impedance functions; reactive elements; regular positive-real functions; resistors; six-element series-parallel network synthesis; Capacitors; Impedance; Inductors; Resistors; Shock absorbers; Springs; Electrical networks; inerter; mechanical control; passivity; transformerless synthesis;
fLanguage :
English
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
Publisher :
ieee
ISSN :
1549-8328
Type :
jour
DOI :
10.1109/TCSI.2012.2206492
Filename :
6265346
Link To Document :
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