Real-time parametric estimation of velocity using optical feedback interferometry

2001 ◽  
Vol 50 (4) ◽  
pp. 915-919 ◽  
Author(s):  
G. Plantier ◽  
N. Servagent ◽  
A. Sourice ◽  
T. Bosch
Keyword(s):  
Real Time ◽  
Optical Feedback ◽  
Parametric Estimation

The use of real-time optical feedback to improve outcomes

2014 ◽  
Author(s):  
Isidro B. Magaña ◽  
Pratik Adhikari ◽  
Raghuvara B. Yendluri ◽  
Glenn P. Goodrich ◽  
Jon A. Schwartz ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Feedback

scholarly journals Real-time wavefront shaping through scattering media by all-optical feedback

2013 ◽  
Vol 7 (11) ◽  
pp. 919-924 ◽  
Author(s):  
Micha Nixon ◽  
Ori Katz ◽  
Eran Small ◽  
Yaron Bromberg ◽  
Asher A. Friesem ◽  
...  
Keyword(s):  
Real Time ◽  
Optical Feedback ◽  
Scattering Media ◽  
All Optical ◽  
Wavefront Shaping

Experimental On-Line Frequency Domain Identification and Adaptive Control of a Flexible Slewing Beam

1996 ◽  
Vol 118 (1) ◽  
pp. 58-65 ◽  
Author(s):  
R. I. Milford ◽  
S. F. Asokanthan
Keyword(s):  
Frequency Domain ◽  
Real Time ◽  
Parametric Estimation ◽  
Identification Algorithm ◽  
Function Estimation ◽  
Persistent Excitation ◽  
Domain Identification ◽  
Frequency Domain Identification ◽  
On Line ◽  
And Control

This paper presents experimental results for the real-time adaptive identification and control of a flexible, slewing beam. A frequency domain identification algorithm incorporating non-parametric transfer function estimation and least squares parametric estimation is used to reconstruct an accurate parametric model of the system, capable of accurately tracking changing plant dynamics in real time. This model is subsequently used to produce an LQG compensator which actively damps beam vibration caused by rapid slewing manoeuvres with large payload changes. Non-persistent excitation is addressed in the context of identification during nominal motion. It is shown that after a short duration learning period, the proposed identification scheme will yield a model which is sufficiently accurate for controller synthesis.

scholarly journals Fast Non-Parametric Estimation of Outbreak Growth from Cumulative Incidence Applied to the Current Ebola Epidemic

2018 ◽  
Author(s):  
Thomas House
Keyword(s):  
Growth Rate ◽  
Real Time ◽  
Cumulative Incidence ◽  
Parametric Estimation ◽  
Disease Dynamics ◽  
Time Estimate ◽  
Incidence Data ◽  
Non Parametric Estimation ◽  
Non Parametric

AbstractA method is presented that works with cumulative incidence data to provide a real-time estimate of the growth rate of an outbreak, without assuming any particular disease dynamics, and this is applied to the current Ebola outbreak.

Optical and Physical Characterization of Cu2-xSe Thin Films for Real Time Spectroscopic Ellipsometry on Cu(In,Ga)Se2-based Photovoltaic Devices

2009 ◽  
Vol 1210 ◽  
Author(s):  
James D Walker ◽  
Himal Khatri ◽  
Scott Little ◽  
Vikash Ranjan ◽  
Robert Collins ◽  
...  
Keyword(s):  
Real Time ◽  
Spectroscopic Ellipsometry ◽  
Growth Temperature ◽  
Room Temperature ◽  
Optical Model ◽  
High Efficiency ◽  
Optical Feedback ◽  
High Surface ◽  
Ex Situ ◽  
Photovoltaic Devices

AbstractIn situ, real time spectroscopic ellipsometry (RTSE) has been used to study the growth processes and optical properties of Cu2-xSe - an important binary compound in the fabrication of high efficiency copper indium gallium diselenide (CIGS) photovoltaic devices. It was found that the high surface roughness of the Cu2-xSe layers necessitated a “graded” optical model in order to extract meaningful dielectric functions at both 550 °C and room temperature. The optical model was verified at room temperature against SEM micrographs and reflectance measurements carried out ex situ. The growth temperature dielectric functions presented in this study are expected to allow for a greater level of control and understanding of the so-called 2- and 3-stage processes for CIGS fabrication in which a Cu2-xSe phase, present at the CIGS grain boundaries, acts as a fluxing agent for the growth of photovoltaic quality CIGS. Real time optical feedback via RTSE combined with the growth temperature dielectric functions presented here could play an important role in improving material fabrication on both the laboratory and industrial scales.

scholarly journals Real-time gas sensing based on optical feedback in a terahertz quantum-cascade laser

2017 ◽  
Vol 25 (24) ◽  
pp. 30203 ◽  
Author(s):  
Till Hagelschuer ◽  
Martin Wienold ◽  
Heiko Richter ◽  
Lutz Schrottke ◽  
Holger T. Grahn ◽  
...  
Keyword(s):  
Real Time ◽  
Quantum Cascade Laser ◽  
Gas Sensing ◽  
Optical Feedback ◽  
Quantum Cascade
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