Wavelength encoding long stroke fiber optic linear position sensor for actuator control applications

1995 ◽  
Author(s):  
William B. Spillman, Jr. ◽  
Robert D. LaClair ◽  
Robert E. Rudd III ◽  
Frederick G. Hoff
Keyword(s):  
Fiber Optic ◽  
Position Sensor ◽  
Control Applications ◽  
Actuator Control ◽  
Long Stroke

Vibration Control of a Flexible Link Manipulator Using an Array of Fiber-Optic Curvature Sensors and Piezoelectric Actuators

2007 ◽  
Author(s):  
Kerem Gurses ◽  
Bradley J. Buckman ◽  
Edward J. Park
Keyword(s):  
Motion Control ◽  
Sensor Array ◽  
Fiber Optic ◽  
Element Model ◽  
Flexible Manipulator ◽  
Flexible Link ◽  
Velocity Feedback ◽  
Lyapunov Approach ◽  
Single Link ◽  
Actuator Control

This paper presents a novel feedback sensing approach for actively suppressing vibrations of a single-link flexible manipulator. Slewing of the flexible link by a rotating hub induces vibrations in the link that persist long after the hub stops rotating. These vibrations are suppressed through a combined scheme of PD-based hub motion control and proposed piezoelectric (PZT) actuator control, which is a composite linear and velocity feedback controller. Lyapunov approach was used to synthesize the controller based on a finite element model of the system. Its realization was possible due to the availability of both linear and angular velocity feedback provided by a unique, commercially-available fiber optic curvature sensor array, called ShapeTape™. It is comprised of an array of fiber optic curvature sensors, laminated on a long, thin ribbon tape, geometrically arranged in such a way that, when it is embedded into the flexible link, the bend and twist of the link’s centerline can be measured. Experimental results show the effectiveness of the proposed approach.

Sapphire Fiber Evanescent Wave Absorption in Turbid Media

2009 ◽  
Vol 63 (8) ◽  
pp. 932-935 ◽  
Author(s):  
Jian Zhang ◽  
Feibing Xiong ◽  
Nicholas Djeu
Keyword(s):  
Glassy Carbon ◽  
Chemical Sensors ◽  
Evanescent Wave ◽  
Fiber Optic ◽  
Wave Interaction ◽  
Carbon Powder ◽  
Control Applications ◽  
Wave Absorption ◽  
Water Band ◽  
Sapphire Fiber

The influence of particulates on sapphire fiber evanescent wave absorption by water has been studied. Suspensions containing microsized graphite flakes and glassy carbon powder were used. Conventional free-space transmittance measurements of these samples showed strong absorption and scattering, which severely screened the absorption by water. However, the absorption on the water band determined from the evanescent wave interaction was unaffected by the presence of the graphite flakes. These results indicate that fiber-optic evanescent wave chemical sensors may be suitable for process control applications involving turbid reactor streams.

Multi-wavelength fiber-optic confocal position sensor with diffractive optics for enhanced measurement range

2007 ◽  
Author(s):  
Garry Berkovic ◽  
Ehud Shafir ◽  
Michael A. Golub ◽  
Moshe Bril ◽  
Valery Shurman
Keyword(s):  
Fiber Optic ◽  
Measurement Range ◽  
Diffractive Optics ◽  
Position Sensor ◽  
Multi Wavelength

High-precision fiber-optic position sensor system using ladar techniques

1991 ◽  
Author(s):  
Edward J. Vertatschitsch ◽  
Gregory L. Abbas ◽  
Michael de La Chapelle ◽  
Charles R. Porter
Keyword(s):  
High Precision ◽  
Fiber Optic ◽  
Sensor System ◽  
Position Sensor

Fiber Optic Position Sensor Array

1988 ◽  
Author(s):  
M. Brenci ◽  
G. Conforti ◽  
A.G. Mignani ◽  
A.M. Scheggi
Keyword(s):  
Sensor Array ◽  
Fiber Optic ◽  
Position Sensor

Long stroke optical fiber linear position sensor for the FLASH program

1996 ◽  
Author(s):  
Robert D. LaClair ◽  
William B. Spillman, Jr. ◽  
W. W. Kuhns ◽  
Mark S. Miller
Keyword(s):  
Optical Fiber ◽  
Position Sensor ◽  
Long Stroke

Fiber-optic position sensor

1990 ◽  
Vol 22 (1-3) ◽  
pp. 435-437 ◽  
Author(s):  
Y. Takamatsu ◽  
K. Tomita ◽  
J. Takagi ◽  
T. Yamashita
Keyword(s):  
Fiber Optic ◽  
Position Sensor
Sign in / Sign up

Export Citation Format

Share Document