2 edition of The Feasibility and design of optical sensors for modal control found in the catalog.
The Feasibility and design of optical sensors for modal control
|Series||NASA-CR -- 181184., NASA contractor report -- NASA CR-181184.|
|Contributions||United States. National Aeronautics and Space Administration.|
|The Physical Object|
The proposed dielectric metasurface supports spectral singularities with asymmetric and highly anisotropic far-field scattering pattern and offers a much broader design parameter space to control wavelength, scattering direction, and efficiency of optical emission when compared to the predominantly 1D or quasi-1D structures studied so :// based on mechanical sensors while the low order shape is corrected through optical feedback. Shown are the results of numerical simulations using real, measured wind data that prove the feasibility of the suggested architecture. Keywords: active optics, telescope control, segmented mirror control 1.
Nakamura, Yuta, Fushinobu, Kazuyoshi, and Tamura, Asato. "Numerical Analysis of Pulse Laser Assisted Curing Region of Photocurable Resins." Proceedings of the ASME International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic :// Attenuation in Optical Fibers / Modes of a Step-Index Fiber / Linearly polarized (LP) modes / Cutoff V values of LP lm modes / Single-Mode Fiber / Modal field pattern of the fundamental mode / Spot size of the fundamental mode / Pulse Dispersion in Single-Mode Optical Fibers /
spherical mirror for application to the active optics modal control loop. Reference 3 contains an explanation of the control system and a design procedure based upon use of the modal control technique. Two approaches for treatment of initial errors are pre-sented; the first approach is deterministic for treatment of known or expected errors, The traditional design approach of feedforward control systems involves the selection of number and location of the actuators and sensors based on some physical understanding of the system. This empirical methodology yields satisfactory results for simple structures and sinusoidal ://
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The feasibility of optical type sensors for control of flexible bodies was examined. The accuracies of such systems were determined via simulation and the sources of potential errors were designated. An initial laboratory design was effected and preliminary results obtained. These results are discussed critically with applications to future studies and system designs.
Get this from a library. The Feasibility and design of optical sensors for modal control. [United States. National Aeronautics and Space Administration.;] A.E.G.
Cass, in Comprehensive Organometallic Chemistry III, Optical Sensors. Optical sensors based upon luminescence often offer very high limits of detection combined with versatile sensing formats. Organometallic compounds are usually employed with either fluorescence or electrogenerated chemiluminescence sensing and the typical format exploits optical fiber or planar M MEHLMANN, G GAUGLITZ, in Surfaces and Interfaces for Biomaterials, Conclusion.
Optical sensors have proven in the past to be either very simple and cost-effective devices or to allow rather sophisticated multisensor applications. As a large number of different optical principles exist, in principle many of these methods can be applied to a huge number of :// Halo H1 has developed the first noninvasive wristband sensor for monitoring hydration levels in athletes by utilizing optical and electrical sensors.
25 design when sweat is modal sensors Feasibility of PCB-Integrated Vibration Sensors for Condition Monitoring of Electronic Systems Optimization of the sensor design and placement is expected to bring the yield to 50 % or better.
The sensors responded as expected to impact tests. Delamination areas were present in the test PCBs, which requires further :// A control system has been designed which uses a three axes gimbal pointing system [2, 3] to stabilize and point the system but existing sensors were determined to b¢ inadequate for task .
Two sensors were determined to be required in the P/OF pointing control system. One sensor would measure the rigid body deflections of the boom/mask Star Trackers are often the most accurate instrument in an Attitude Determination and Control Systems, but often present a slow update rate, requiring additional sensor and sensor fusion algorithms to provide a smoother and faster output.
However, the available rate gyros are either noisy, or expensive and heavy. The proposed work investigates the feasibility of high-speed star trackers with Actuators & Sensors in Mechatronics: Introduction to Sensors K.
Craig 3 • Monitoring of Processes and Operations – Certain applications of measuring instruments may be characterized as having essentially a monitoring function, e.g., thermometers, barometers, and water, gas, and electric meters.
• Control of Processes and Novel Design Method of COG Measurement System Via Supporting Reaction Method ,29(2) [Abstract] [PDF (k)] Jing Yao，Yuxin Yin，Zhaosheng Dong，Yuantong He Design of a 70 MPa Two-Way Proportional Cartridge Valve for Large-Size ] The sensors were fabricated by reactive magnetron sputtering of indium tin oxide (ITO) on a cm-long core of polymer-clad silica fibers.
ITO tuned in optical properties and thickness allows for achieving a lossy-mode resonance (LMR) phenomenon and it can be simultaneously applied as an electrode in an electrochemical :// Optical Engineering (OE) publishes peer-reviewed papers reporting on research, development, and applications of optics, photonics, and imaging science and :// The design concept and theory of a dual-sensor system capable of measuring a 3-DOF planar motion in real time is then presented.
Along with a detailed analysis, the concept feasibility of a prototype 3-DOF dual-sensor system for measuring the instantaneous center of rotation and the angular displacement of a moving surface is demonstrated Application of FOSs in concrete was first suggested by Mèndez et al.
in , while the earliest use of FBG sensors as a structural health monitoring device in a real bridge structure was This paper addresses the analysis and design of an optical sensor for the real-time measurement of the tilt angle in hypersport motorcycles.
The aim of this paper is to design a compact, reliable This paper discusses distributed parameter sensors designed to extract vibration modes of a structure, as well as its active modal control.
Compared to conventional point sensors such as accelerometers or displacement sensors, the distributed parameter sensors are superior to point sensors provided that they are properly designed.
First, this paper overviews a conventional modal filter The paper reports the use of a distributed optical fiber sensor based on stimulated Brillouin scattering, for structural vibration control. A cantilevered flexible aluminum beam was used as test-bed for vibration control.
The proposed approach allows acquiring simultaneously the dynamic strain at several locations. The dynamic strain measured at one (or more) fiber location can be used to A new class of distributed sensors is presented which can measure both the linear and angular deflections of composite beams.
The sensor relies in its operation on a set of wires which are embedded off the neutral axes of the composite :// /4///A-New-Class-of-Distributed-Sensors. Jin, Z, Mita, A & Rongshuai, LMulti-objective differential evolution algorithm for stochastic system identification.
in Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace SystemsG, Proceedings of SPIE - The International Society for Optical Engineering, vol. SPIE Conference on Sensors 6 May Engineering feasibility of induced strain actuators for rotor blade active vibration control.
Intelligent plate vibration control using piezoelectric sensors and actuators Modeling of piezoelectric intelligent structures and quasi independent modal control Proceedings of SPIE (October 30 ) Subscribe to Digital ://.
The control architecture, depicted at Figure 3, is composed of modules for perception, internal world representation, decision-making and multi-modal user communication.
The internal representation serves as the information source for ://Sensors and Tissue Engineering—sensor technology is critical for every stage of the tissue fabrication process.
Sensor Platforms—biological sensors have been developed using many different platforms, some of which include magnetic fields, acoustic waves and optical properties of light. Flexible Sensors—biological systems are not rigid, but rather flexible, and a new generation of Abstract.
Optical imaging and sensing modalities have been used in medical diagnosis for many years. An obvious example is endoscopy, which allows remote wide-field imaging of internal tissues using optical fibers and/or miniature charge-coupled device (CCD) ://