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Journal ArticleDOI

On the Identification Problem

Lotfi A. Zadeh
- 01 Dec 1956 - 
- Vol. 3, Iss: 4, pp 277-281
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TLDR
In this paper, the identification of zero-memory multipoles and two-poles of class n_1 was studied, where the test signals are sine waves of different amplitudes and frequencies, and the measured quanity is the describing function of the device.
Abstract
The identification problem involves the determination of the identity of a black box from the observation of its responses to a set of input signals. In this paper attention is focused on the identification of zero-memory multipoles and two-poles of class n_1 . The test signals are sine waves of different amplitudes and frequencies, and the measured quanity is the describing function of the device. In the case of two-poles of class n_1 , it is found that the describing function is related to the characteristic function by an integral equation of second order which can be solved explicitly by the use of the Fourier-Hankel transformation.

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Citations
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Journal ArticleDOI

An iterative method for the identification of nonlinear systems using a Hammerstein model

TL;DR: In this article, an iterative method is proposed for the identification of nonlinear systems from samples of inputs and outputs in the presence of noise, which consists of a no-memory gain (of an assumed polynomial form) followed by a linear discrete system.
Journal ArticleDOI

Perspectives on System Identification

TL;DR: This presentation aims at giving an overview of the “science” side of System identification, i.e. basic principles and results and at pointing to open problem areas in the practical, “art”, side of how to approach and solve a real problem.
Journal ArticleDOI

Closed-loop and activity-guided optogenetic control.

TL;DR: This work highlights technical and theoretical foundations as well as recent advances and opportunities in optogenetic experimentation in the context of addressing these challenges with closed-loop optogenetics control in behaving animals.
Journal ArticleDOI

Frequency domain identification of Hammerstein models

TL;DR: In this paper, a frequency domain approach was proposed to identify the Hammerstein model in the frequency domain using sampled input-output data, and its convergence was shown for both the linear and nonlinear subsystems in the presence of noise.
Journal ArticleDOI

Frequency domain identification of Wiener models

TL;DR: A frequency domain algorithm for Wiener model identifications based on exploring the fundamental frequency and harmonics generated by the unknown nonlinearity is proposed.
References
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Journal ArticleDOI

The Orthogonal Development of Non-Linear Functionals in Series of Fourier-Hermite Functionals

TL;DR: In this paper, Kaczmarz and Steinhaus [I, pp. 143-144] showed that the equality W 1~~~~~~~~~~~~ |G a, ot(t) dx(t), *,Iap(t)-dx(t)] dwx (2.5) c 00 -p/2 L G(ui, *, up)euhu du,... du.
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Note on N-dimensional hermite polynomials

TL;DR: In this article, it is shown that a complete set of orthonormal polynomials in N variables can be obtained by using products of such polynomial in a single variahle.
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A contribution to the theory of nonlinear systems

TL;DR: In this paper, a system of classification for nonlinear two-poles is introduced and some of the basic properties of twopoles of various classes are established, such that each class in the sequence is a subclass of all the classes following it.
Journal ArticleDOI

The Measurement and Representation of Nonlinear Systems

TL;DR: In this paper, a general approach is presented in which the response is approximated by a linear combination of responses of known systems, and the coefficients in this combination are the parameters that are to be determined.
Journal ArticleDOI

A method for evaluating nonlinear servomechanisms

TL;DR: In this article, a method is presented for determining a valid mathematical description of a class of nonlinear servomechanisms from measurements of the servo response to a set of input signals.