Results 81 to 90 of about 3,247,690 (230)

A new fault diagnosis approach for the pitch system of wind turbines

Advances in Mechanical Engineering, 2017
To diagnose the fault in the pitch actuator of wind turbines which causes the change in pitch angles, a fault diagnosis method is proposed in this study.
Dinghui Wu, Wen Liu
doaj   +1 more source

Identification of nonlinear state-space systems using zero-input responses [PDF]

, 2004
This paper studies the generalization of linear subspace identification techniques to nonlinear systems. The basic idea is to combine nonlinear minimal realization techniques based on the Hankel operator with embedding theory used in time-series modeling.
Scherpen, Jacquelien,, Verdult, Vincent,
core   +1 more source

Asymptotic and bootstrap tests for the dimension of the non-Gaussian subspace

, 2017
Dimension reduction is often a preliminary step in the analysis of large data sets. The so-called non-Gaussian component analysis searches for a projection onto the non-Gaussian part of the data, and it is then important to know the correct dimension of ...
Nordhausen, Klaus, Oja, Hannu, Tyler, David E., Virta, Joni   +3 more
core   +1 more source

STATE CONSTRUCTION IN SUBSPACE IDENTIFICATION

IFAC Proceedings Volumes, 2006
Abstract In this presentation, we consider the problem of obtaining the state trajectory directly from an observed vector time-series. We show how the Hankel structure of the data matrix can be exploited in this construction. Both the cases of infinite as well as finite time-series are considered, but only deterministic systems are discussed.
Jan C. Willems, Ivan Markovsky, Bart De Moor   +2 more
openaire   +1 more source

Identification of the time-varying modal parameters of a spacecraft with flexible appendages using a recursive predictor-based subspace identification algorithm

, 2019
This study focuses on the recursive identification of the time-varying modal parameters of on-orbit spacecraft caused by structural configuration changes.
Zhiyu Ni, Jinguo Liu, Zhigang Wu
semanticscholar   +1 more source

Subspace-based damage identification of roller bearing

MATEC Web of Conferences, 2015
This study presents a frequency-band subspace-based damage identification method for faults diagnosis in roller bearing. The main purpose is to obtain damage sensitive indicators in the frequency range where a damage is expected to appear.
Gautier G., Serra R., Mencik J.-M.
doaj   +1 more source

The Shareholders’ Derivative-Claim Exception to the Attorney-Client Privilege [PDF]

, 1985
The use of an over-parametrized state-space model for system identification has some clear advantages: A single model structure covers the entire class of multivariable systems up to a given order.
Helmersson, Anders, McKelvey, Tomas
core   +1 more source

Locality and nonlocality in quantum pure-state identification problems

, 2008
Suppose we want to identify an input state with one of two unknown reference states, where the input state is guaranteed to be equal to one of the reference states.
A. Hayashi, A. S. Holevo, C. W. Helstrom, M. Hamermesh, M. Horibe, T. Hashimoto, Y. Ishida   +6 more
core   +1 more source

Deterministic-Stochastic Subspace Identification of the Modal Parameters of a Machine Tool During Milling

Journal of Manufacturing and Materials Processing
Modal analysis is a standard tool for evaluating the dynamic behaviour of machine tools. Since the dynamic behaviour can differ for operating and analysis conditions, the use of operational modal analysis for machine tools has been researched over the ...
Willy Reichert, Martin Kolouch, Jan Berthold, Steffen Ihlenfeldt, Max Engelmann   +4 more
doaj   +1 more source

Blind multivariable ARMA subspace identification

Automatica, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yu, C. (author), Verhaegen, M.H.G. (author)   +1 more
openaire   +3 more sources