Results 271 to 280 of about 1,017,685 (293)
Some of the next articles are maybe not open access.
The circle criterion and describing function analysis
IEEE Transactions on Automatic Control, 1968The radius of the stability circle used in the circle criterion is given by worst-case output distortion components gain. Except for synchronous cases, these components are neglected in describing function analysis. The conservative stability estimates of the circle crlterion for a time-varying operator are perhaps due to the implicit possibility of ...
openaire +1 more source
A new unit circle stability criterion
2005New necessary and sufficient conditions for a real polynomial to have all its zeros inside the unit circle are derived. The conditions are obtained by the study of certain new forms of z-domain continued fraction expansions. They induce an effective procedure for testing the stability of discrete systems that reminds in many ways the Routh scheme for ...
openaire +1 more source
Frequency domain evaluation of discrete-time circle criterion and Tsypkin Criterion in the MIMO case
1999 European Control Conference (ECC), 1999Many control applications can be described as discrete-time nonlinear feedback systems whose stability properties can e.g. be analyzed with the Discrete-Time Circle Criterion or the Tsypkin Criterion. This paper presents new methods for the evaluation of these sector criteria in the multivariable case. The new methods are based on graphic elements: the
openaire +1 more source
Necessary and sufficient conditions of stability: a multiloop generalization of the circle criterion
IEEE Transactions on Automatic Control, 1993Summary: We consider a linear time-invariant system with a vector output and with a vector input. This system is closed by an uncertain (nonlinear, time- varying) feedback. The only information on this feedback is given by several integral quadratic inequalities, i.e., the uncertainties under consideration generalize the so-called conic nonlinearities.
openaire +3 more sources
Sbornik: Mathematics
The circle criterion (for continuous-time systems) and Tsypkin's criterion (for discrete-time systems) of absolute stability for Lurie systems with several nonlinearities are obtained with the use of the convolution theorem and without use of the $S$-procedure. On the basis of the convolution theorem, two theorems are proved which lead to a substantial
openaire +1 more source
The circle criterion (for continuous-time systems) and Tsypkin's criterion (for discrete-time systems) of absolute stability for Lurie systems with several nonlinearities are obtained with the use of the convolution theorem and without use of the $S$-procedure. On the basis of the convolution theorem, two theorems are proved which lead to a substantial
openaire +1 more source
Part Iv—Selection of Treatment: Anatomic Considerations and Criteria
Ca-A Cancer Journal for Clinicians, 1962Charles M Norris +2 more
exaly
Proctosigmoidoscopy—Age Criteria for Examination in the Asymptomatic Patient
Ca-A Cancer Journal for Clinicians, 1975John A Coller +2 more
exaly
An Off-Axis Circle Criterion for Stability of Feedback Systems With a Monotonic Nonlinearity
IEEE Transactions on Automatic Control, 1968K Narendra
exaly
Circle and Popov Criteria as Tools for Nonlinear Feedback Design
Automatica, 2003Murat Arcak, Petar Kokotovic
exaly