STABILITY OF 2ND-ORDER TIME-VARYING CONSTRAINED NOTCH FILTERS

被引：1
|
作者：
WULICH, D
PLOTKIN, EI
SWAMY, MNS
机构：
[1] Department of Electrical and Computer Engineering, Concordia University, Quebec, 1455 DeMaisonneuve Blvd.
来源：
ELECTRONICS LETTERS | 1990年 / 26卷 / 18期
关键词：
filters; Stability;
D O I：
10.1049/el:19900968
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The stability of second order time-varying constrained notch filters (TVCNF) which are capable of rejecting a sine signal with time-varying frequency is analysed. Two cases are considered: TVCNF1, where one of the two coefficients of the filter is allowed to vary with time while the value of the second coefficient is kept constant; TVCNF2, where both the coefficients can vary with time. It is shown that TVCNF2 is always asymptotically stable while the TVCNF1 possesses unstable regions. Thus for tracking a sine signal with timevarying frequency, TVCNF2 is preferable to TVCNF2. © 1990, The Institution of Electrical Engineers. All rights reserved.
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页码：1508 / 1509
页数：2
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