Optimal spectral control of multiple waves in smart composite beams with distributed sensor-actuator configuration

2001 ◽  
Author(s):  
S. Gopalakrishnan ◽  
Debiprosad R. Mahapatra
Keyword(s):  
Composite Beams ◽  
Smart Composite ◽  
Distributed Sensor ◽  
Sensor Actuator ◽  
Spectral Control

Free vibration control of smart composite beams using particle swarm optimized self-tuning fuzzy logic controller

2014 ◽  
Vol 333 (21) ◽  
pp. 5244-5268 ◽  
Author(s):  
Nemanja D. Zorić ◽  
Aleksandar M. Simonović ◽  
Zoran S. Mitrović ◽  
Slobodan N. Stupar ◽  
Aleksandar M. Obradović ◽  
...  
Keyword(s):  
Fuzzy Logic ◽  
Free Vibration ◽  
Vibration Control ◽  
Fuzzy Logic Controller ◽  
Particle Swarm ◽  
Composite Beams ◽  
Smart Composite ◽  
Self Tuning

A New Class of Distributed Sensors

1997 ◽  
Vol 119 (4) ◽  
pp. 582-589 ◽  
Author(s):  
A. Baz ◽  
S. Poh
Keyword(s):  
Continuous Monitoring ◽  
Composite Beams ◽  
Distributed Sensors ◽  
Experimental Performance ◽  
Distributed Sensor ◽  
New Class ◽  
Laser Sensors ◽  
Frequency Domains ◽  
Angular Displacements ◽  
Conventional Laser

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 beams. The wires are arranged in a special manner which allows continuous monitoring of the deflection curve of the beam. The output signals of the wires are processed to determine the linear and angular displacements at critical discrete points along the beam axis. The theoretical and experimental performance of the sensor is presented in both the time and frequency domains. Comparisons are given between the experimental performance of the distributed sensor and that of conventional laser sensors in order to demonstrate the accuracy and merits of the distributed sensor. The results obtained suggest the potential of this new class of sensors as a viable means for monitoring the static and dynamic deflections of flexible composite SMART beams and plates.

Optimal vibration control of smart composite beams with optimal size and location of piezoelectric sensing and actuation

2012 ◽  
Vol 24 (4) ◽  
pp. 499-526 ◽  
Author(s):  
Nemanja D Zorić ◽  
Aleksandar M Simonović ◽  
Zoran S Mitrović ◽  
Slobodan N Stupar
Keyword(s):  
Vibration Control ◽  
Composite Beams ◽  
Optimal Size ◽  
Smart Composite

scholarly journals Perancangan Jaringan Sensor Terdistribusi untuk Pengaturan Suhu, Kelembaban dan Intensitas Cahaya

2013 ◽  
Vol 1 (2) ◽  
pp. 42 ◽  
Author(s):  
Bimo Ananto Pamungkas ◽  
Adian Fatchur Rochim ◽  
Eko Didik Widianto
Keyword(s):  
Light Intensity ◽  
Automatic Monitoring ◽  
Environmental Data ◽  
Communication Tool ◽  
Air Humidity ◽  
Process Data ◽  
Distributed Sensor ◽  
Sensor Actuator ◽  
Control Interface ◽  
Sensor System Design

This paper contains distributed sensor system design for temperature, air humidity, and light intensity monitoring in greenhouse based Arduino Uno board. System contains 2 sensor-actuator nodes, and 1 controller node connected to Ethernet network through Ethernet Shield board. Sensor-actuator node with DHT 11 sensor works for taking environment informations such as temperature, air humidity, and light intensity, runs actuation in the form of emulating LED lights; and communicates with controller node which will process data using serial wire as a communication tool between nodes. Monitoring datas and user control interface is provided by controller node which can be accessed online in web browser. The system ability for monitoring environment in greenhouse and online access of environmental data generates controllable and automatic monitoring and management of plants.

Fabrication, Analysis and Testing of Smart Adaptive Composite Beams

2018 ◽  
Vol 10 (5) ◽  
Author(s):  
Basavaraj Noolvi ◽  
Shanmukha Nagaraj ◽  
S. Raja
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Free Vibration ◽  
Composite Beams ◽  
Smart Composite ◽  
Dynamic Tests ◽  
Element Analysis ◽  
Static And Dynamic Tests ◽  
Adaptive Composite ◽  
Good Agreement

The presented research involves two types of Smart adaptive composite beams (SAC). The study was conducted on smart composite beams composed of LY5210 and EPOLAM 2063 resin systems respectively. The fabrication of composite beams involved embedding SMA wires in between layers of 0/90 woven glass fibre in the respective resin systems, followed by suitable curing and post curing cycles. Suitable mould was designed and manufactured to facilitate the required pre-straining of SMA wires. Both static and dynamic tests were done on the SAC specimens to study the behaviour of these SACs. Static and free vibration analyses were carried out using MSC Nastran and Hypermesh. There has been good agreement between the results of finite element analysis and the experimental results.

Active Control of Nonlinear Transient Vibration of Laminated Composite Beams Using Triangular SCLD Treatment With Fractional Order Derivative Viscoelastic Model

2019 ◽  
Vol 141 (11) ◽  
Author(s):  
S. R. Sahoo ◽  
M. C. Ray
Keyword(s):  
Fractional Order ◽  
Composite Beam ◽  
Laminated Composite ◽  
Composite Beams ◽  
Order Derivative ◽  
Two Dimensional ◽  
Smart Composite ◽  
Fractional Order Derivative ◽  
Nonlinear Transient ◽  
Laminated Composite Beams

Abstract This paper is concerned with the analysis of the effectiveness of triangular shaped smart constrained layer damping (SCLD) treatment in attenuating geometrically nonlinear transient vibrations of laminated composite beams. The SCLD treatment is comprised of an advanced vertically reinforced 1–3 piezoelectric composite (PZC) as the constraining layer and an isotropic viscoelastic layer as the constrained layer, which is modeled using a two-dimensional fractional order derivative (FOD) model with Grünwald definition of the FODs. A nonlinear meshfree model of the smart composite beam is developed for analyzing its nonlinear transient response within the framework of a layerwise shear and normal deformation theory considering von Kármán type geometric nonlinearity. Cantilever type composite beams having different lamination sequences integrated with regular rectangular/triangular type of SCLD treatments are considered for presenting the numerical results. For comparison purpose, a geometrical constraint has been imposed such that both the rectangular and triangular shaped SCLD treatments will cover the equal area on the top surface of the beam. The numerical analyses demonstrate the effectiveness of the triangular shaped SCLD patches over the rectangular SCLD treatment in controlling the nonlinear vibration of laminated composite beams. The two-dimensional FOD model of the viscoelastic material has been efficiently implemented for the active damping analysis of smart composite beam.

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