High Speed RLS Parameter Estimation by Systolic-like Arrays

1988 ◽  
pp. 471-485 ◽  
Author(s):  
Luigi Chisci
Keyword(s):  
Parameter Estimation ◽  
High Speed

scholarly journals Modeling high-speed positioning systems with focus on suitability for parameter estimation

2018 ◽  
Vol 51 (2) ◽  
pp. 397-402 ◽  
Author(s):  
S. Mayr ◽  
G. Grabmair ◽  
J. Reger
Keyword(s):  
Parameter Estimation ◽  
High Speed ◽  
Positioning Systems

scholarly journals Comparison of Techniques for the Estimation of Flow Parameters of Fan Inflow Turbulence from Noisy Hot-Wire Data

Fluids ◽  
2021 ◽  
Vol 6 (11) ◽  
pp. 372
Author(s):  
Luciano Caldas ◽  
Carolin Kissner ◽  
Maximilian Behn ◽  
Ulf Tapken ◽  
Robert Meyer
Keyword(s):  
Signal Processing ◽  
Parameter Estimation ◽  
High Speed ◽  
Window Size ◽  
Measured Data ◽  
Frequency Resolution ◽  
Hot Wire ◽  
Turbulence Parameter ◽  
Estimation Techniques ◽  
Inflow Turbulence

Turbulence parameters, in particular integral length scale (ILS) and turbulence intensity (Tu), are key input parameters for various applications in aerodynamics and aeroacoustics. The estimation of these parameters is typically performed using data obtained via hot-wire measurements. On the one hand, hot-wire measurements are affected by external disturbances resulting in increased measurement noise. On the other hand, commonly applied turbulence parameter estimators lack in robustness. If not addressed correctly, both issues may impede the accuracy of the turbulence parameter estimation. In this article, a procedure consisting of several signal processing steps is presented to filter non-turbulence related disturbances from the unsteady velocity data. The signal processing techniques comprise time- and frequency-domain approaches. For the turbulence parameter estimation, two different models of the turbulence spectra—the von Kármán model and the Bullen model—are fitted to match the spectrum of the measured data. The results of several parameter estimation techniques are compared. Computational Fluid Dynamics (CFD) data are used to validate the estimation techniques and also to assess the influence of the variation in window size on the estimated parameters. Additionally, hot-wire data from a high-speed fan rig are analyzed. ILS and Tu are assessed at several radial positions for two fan speeds. It is found that most techniques yield similar values for ILS and Tu. The comparison of the fitted spectra with the spectra of the measured data shows a good agreement in most cases provided that a sufficiently fine frequency resolution is applied. The ratio of ILS and Tu of the velocity components in longitudinal and transverse direction allows the assessment of flow-isotropy. Results indicate that the turbulence is anisotropic for the investigated flow fields.

High-Speed Parameter Estimation of Step Motors

1993 ◽  
Author(s):  
Andrew J. Blauch ◽  
Marc Bodson ◽  
John Chiasson
Keyword(s):  
Parameter Estimation ◽  
High Speed ◽  
Speed Parameter

scholarly journals Robust Diagnosis Method Based on Parameter Estimation for an Interturn Short-Circuit Fault in Multipole PMSM under High-Speed Operation

Sensors ◽  
2015 ◽  
Vol 15 (11) ◽  
pp. 29452-29466 ◽  
Author(s):  
Jewon Lee ◽  
Seokbae Moon ◽  
Hyeyun Jeong ◽  
Sang Kim
Keyword(s):  
Parameter Estimation ◽  
High Speed ◽  
Short Circuit ◽  
Diagnosis Method ◽  
Short Circuit Fault

New Parameter Estimation and Detection Algorithm for High Speed Small Target

2011 ◽  
Vol 47 (1) ◽  
pp. 214-224 ◽  
Author(s):  
Mengdao Xing ◽  
Junhai Su ◽  
Genyuan Wang ◽  
Zheng Bao
Keyword(s):  
Parameter Estimation ◽  
High Speed ◽  
Detection Algorithm ◽  
Small Target

Fluorescence Thermometry

1992 ◽  
Vol 45 (7) ◽  
pp. 253-260 ◽  
Author(s):  
L. Jonathan Dowell
Keyword(s):  
Remote Sensing ◽  
Parameter Estimation ◽  
High Speed ◽  
Temperature Dependent ◽  
Calibration Standards ◽  
Fluorescence Parameters ◽  
Parameter Estimation Techniques ◽  
Rare Earth Doped ◽  
Mechanical Phenomena ◽  
Fluorescence Thermometry

The fluorescence of rare-earth-doped ceramic phosphors depends on temperature. Particularly, the fluorescence lifetime is decreased by temperature. This dependence makes the fluorescence suitable for measuring temperature. This paper describes the physics of the fluorescence of these ceramics, noting the works of Forster, Dexter, Inokuti, Hirayama, and others. Next, it outlines the several advantages of fluorescence thermometry. These advantages include (a) measurement of temperature by transfer to measurement standards for time, (b) remote sensing for surface thermometry, (c) high speed of measurement relative to many physical and mechanical phenomena, (d) narrow-spectrum optical sensing suitable for hostile electrical and luminous environments, and (e) the transfer of calibration standards for precise thermometry. The paper presents engineering considerations for realizing these advantages. It presents parameter-estimation techniques that allow measurement of the temperature-dependent fluorescence parameters. It describes instrumentation techniques that transfer the measurement of temperature to measurement of units of time, with instrument calibration by atomic standards. It also discusses other measurement and instrumentation details.

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