Prof. Norman M. Wereley Profile

Prof. Norman M. Wereley

Professor and Dept Chair at Univ of Maryland College Park

SPIE Involvement:

Fellow status | Conference Program Committee | Symposium Chair | Conference Co-Chair | Conference Chair | Author | Instructor

Area of Expertise:

magnetorheological fluids and devices , Occupant protection systems, e.g. seating , smart materials and structures , helicopters, aircraft, ground vehicles , Vibration and shock isolation

Websites:

Company Website | LinkedIn Website

Profile Summary

Norman M. Wereley is Chair and Minta Martin Professor of Aerospace Engineering at the University of Maryland. His research interests are in dynamics and control of smart structures, with emphasis on active and passive vibration damping control applied to rotorcraft, aerospace and automotive systems. Key research areas are: (1) theory and application of semi-active magnetorheological dampers, and application to occupant protection, vibration isolation, and stability augmentation systems using advanced feedback control strategies, and (2) actuator development using smart materials (PZT, PMN, GalFeNOL, TerFeNOL), pneumatics, and passive/active compliant structures for morphing aircraft or helicopter rotor blades. Wereley has published over 210 journal articles, 16 book chapters, and over 250 conference articles. Wereley is co-inventor on 20 patents and several patents pending. He is Editor of the Journal of Intelligent Material Systems and Structures and associate editor of Smart Materials and Structures, AIAA Journal, and Advances in Materials Research. He was Chair (2012-2013) of the SPIE Smart Structures/NDE Symposium, and has chaired several international conferences. Wereley has been awarded the AIAA National Capital Section Engineer of the Year (2009), AIAA Sustained Service Award (2011), AHS Harry T. Jensen Award (2011), and ASME Adaptive Structures and Materials Systems Best Paper Awards in Structural Dynamics and Control (2004, 2012). Wereley was recipient of the ASME Adaptive Structures and Material Systems Prize (2012), SPIE Smart Structures and Materials Lifetime Achievement Award (2013), and SPIE Smart Structures and Materials Product Implementation Award (2013). Wereley is a Fellow of SPIE, AIAA, AHS, ASME, and IOP; a lifetime member of SPIE, AIAA, and AHS; and a senior member of IEEE. Dr. Wereley holds a B.Eng. (1982) from McGill University, and M.S. (1987) and Ph.D. (1990) in Aeronautics and Astronautics from the Massachusetts Institute of Technology.

Publications (61)

PROCEEDINGS ARTICLE | March 27, 2018

Structural health monitoring of a composite F/A-18 wing section using a sparse piezoelectric transducer array

Proc. SPIE. 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018

KEYWORDS: Ferroelectric materials, Waveguides, Sensors, Signal attenuation, Skin, Composites, Inspection, Ultrasonics, Transducers, Structural health monitoring

PROCEEDINGS ARTICLE | April 1, 2014

Magnetorheological impact seat suspensions for ground vehicle crash mitigation

Proc. SPIE. 9057, Active and Passive Smart Structures and Integrated Systems 2014

KEYWORDS: Actuators, Neck, Control systems, Kinematics, Head, Vibration control, Bismuth, Analytical research, Systems modeling, Device simulation

PROCEEDINGS ARTICLE | April 17, 2013

Adaptive magnetorheological seat suspension for shock mitigation

Proc. SPIE. 8690, Industrial and Commercial Applications of Smart Structures Technologies 2013

KEYWORDS: Injuries, Chest, Signal attenuation, Magnetism, Head, Biological research, Motion models, Spine, Electromagnetism, Land mines

PROCEEDINGS ARTICLE | April 10, 2013

Simulation of adaptive semi-active magnetorheological seat damper for vehicle occupant blast protection

Proc. SPIE. 8688, Active and Passive Smart Structures and Integrated Systems 2013

KEYWORDS: Mathematical modeling, Neck, Injuries, Data modeling, Control systems, Head, Spine, Tolerancing, Performance modeling, Land mines

PROCEEDINGS ARTICLE | April 10, 2013

Analysis and testing of an inner bypass magnetorheological damper for shock and vibration mitigation

Proc. SPIE. 8688, Active and Passive Smart Structures and Integrated Systems 2013

KEYWORDS: Mathematical modeling, Magnetism, Finite element methods, Connectors, Analytical research, Electromagnetism, Performance modeling, Fluid dynamics, Prototyping, Protactinium

PROCEEDINGS ARTICLE | April 8, 2013

Nonlinear analysis of quasi-static response of pneumatic artificial muscles for agonistic and antagonistic actuation modes

Proc. SPIE. 8686, Bioinspiration, Biomimetics, and Bioreplication 2013

KEYWORDS: Actuators, Radon, Data modeling, Robotics, Biomimetics, Bladder, Optimization (mathematics), Systems modeling, Model-based design, Artificial muscles

PROCEEDINGS ARTICLE | April 3, 2013

Semi-empirical modeling of hysteresis compensation in magnetostrictive actuator

Proc. SPIE. 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013

KEYWORDS: Mathematical modeling, Actuators, Capacitors, Resistance, Amplifiers, Capacitance, Mathematics, Motion models, Astatine, Device simulation

PROCEEDINGS ARTICLE | March 31, 2012

High shear rate characterization of magnetorheological fluids

Proc. SPIE. 8341, Active and Passive Smart Structures and Integrated Systems 2012

KEYWORDS: Mathematical modeling, Microfluidics, Data modeling, Magnetic resonance imaging, Particles, Magnetism, Data acquisition, Mining, Magnetorheological finishing, Fluid dynamics

PROCEEDINGS ARTICLE | March 31, 2012

A bi-annular-gap magnetorheological energy absorber for shock and vibration mitigation

Proc. SPIE. 8341, Active and Passive Smart Structures and Integrated Systems 2012

KEYWORDS: Magnetism, Power supplies, Finite element methods, Bismuth, Electromagnetism, Performance modeling, Magnetorheological finishing, Fluid dynamics, Electrical breakdown, Protactinium

For semi-active shock and vibration mitigation systems using magnetorheological energy absorbers (MREAs), the minimization of the field-off damper force of the MREA at high speed is of particular significance because the damper force due to the viscous damping at high speed becomes too excessive and thus the controllable dynamic force range that is defined by the ratio of the field-on damper force to the field-off damper force is significantly reduced. In this paper, a bi-annular-gap MREA with an inner-set permanent magnet is proposed to decrease the field-off damper force at high speed while keeping appropriate dynamic force range for improving shock and vibration mitigation performance. In the bi-annular-gap MREA, two concentric annular gaps are configured in parallel so as to decrease the baseline damper force and both magnetic activation methods using the electromagnetic coil winding and the permanent magnet are used to keep holding appropriate magnetic intensity in these two concentric annular gaps in the consideration of failure of the electric power supply. An initial field-on damper force is produced by the magnetic field bias generated from the inner-set permanent magnet. The initial damper force of the MREA can be increased (or decreased) through applying positive (or negative) current to the electromagnetic coil winding inside the bi-annular-gap MREA. After establishing the analytical damper force model of the bi-annular-gap MREA using a Bingham-plastic nonlinear fluid model, the principle and magnetic properties of the MREA are analytically validated and analyzed via electromagnetic finite element analysis (FEA). The performance of the bi-annular-gap MREA is also theoretically compared with that of a traditional single-annular- gap MREA with the constraints of an identical volume by the performance matrix, such as the damper force, dynamic force range, and Bingham number with respect to different excitation velocities.

PROCEEDINGS ARTICLE | March 28, 2012

Fabrication and characterization of fluidic artificial muscles having millimeter-scale diameters

Proc. SPIE. 8341, Active and Passive Smart Structures and Integrated Systems 2012

KEYWORDS: Mathematical modeling, Actuators, Data modeling, Silicon, Manufacturing, Aluminum, Epoxies, Bladder, Positron emission tomography, Artificial muscles

PROCEEDINGS ARTICLE | April 27, 2011

Semi-active magnetoreheological refueling probe systems for aerial refueling events

Proc. SPIE. 7977, Active and Passive Smart Structures and Integrated Systems 2011

KEYWORDS: Aerospace engineering, Signal attenuation, Fourier transforms, Receivers, Smart structures, Connectors, Aerodynamics, System integration, Astatine, Current controlled current source

PROCEEDINGS ARTICLE | April 10, 2010

Design and testing of a magnetorheological damper to control both vibration and shock loads for a vehicle crew seat

Proc. SPIE. 7643, Active and Passive Smart Structures and Integrated Systems 2010

KEYWORDS: Injuries, Data modeling, Resistance, Magnetism, Head, Vibration control, Finite element methods, Electromagnetism, Fluid dynamics, Prototyping

PROCEEDINGS ARTICLE | April 7, 2009

Performance robustness of a magnetorheological seat suspension to temperature variations using skyhook control

Proc. SPIE. 7288, Active and Passive Smart Structures and Integrated Systems 2009

KEYWORDS: Sensors, Nitrogen, Numerical simulations, Control systems, Vibration isolation, Optical isolators, Performance modeling, Affine motion model, Temperature metrology, Liquids

PROCEEDINGS ARTICLE | April 30, 2007

Shock load mitigation using magnetorheological energy absorber with bifold valves

Proc. SPIE. 6527, Industrial and Commercial Applications of Smart Structures Technologies 2007

KEYWORDS: Carbon, Iron, Data modeling, Metals, Particles, Resistance, Magnetism, Control systems, Fluid dynamics, Ranging

PROCEEDINGS ARTICLE | April 6, 2007

Blocked force and free displacement characterization of PMN-32%PT stacks

Proc. SPIE. 6526, Behavior and Mechanics of Multifunctional and Composite Materials 2007

KEYWORDS: Actuators, Transformers, Crystals, Ceramics, Dielectrics, Manufacturing, Amplifiers, Power supplies, Transducers, Crystallography

PROCEEDINGS ARTICLE | May 16, 2005

Effective design strategy for a magneto-rheological damper using a nonlinear flow model

Proc. SPIE. 5760, Smart Structures and Materials 2005: Damping and Isolation

KEYWORDS: Magnetism, Amplifiers, Computer simulations, Solids, Bismuth, Motion models, Testing and analysis, Performance modeling, Fluid dynamics, Instrument modeling

PROCEEDINGS ARTICLE | May 16, 2005

An automotive suspension strut using compressible magnetorheological fluids

Proc. SPIE. 5760, Smart Structures and Materials 2005: Damping and Isolation

KEYWORDS: Data modeling, Particles, Silicon, Resistance, Magnetism, Control systems, Head, Bismuth, Cardiovascular magnetic resonance imaging, Liquids

PROCEEDINGS ARTICLE | May 16, 2005

Genetic algorithms for rheological parameter estimation of magnetorheological fluids

Proc. SPIE. 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics

KEYWORDS: Microfluidics, Genetic algorithms, Iron, Data modeling, Nanoparticles, Particles, Magnetism, Cobalt, Genetics, Instrument modeling

PROCEEDINGS ARTICLE | July 29, 2004

Shock isolation systems using magnetorheological dampers

Proc. SPIE. 5386, Smart Structures and Materials 2004: Damping and Isolation

KEYWORDS: Defense and security, Actuators, Control systems, Electronic components, Defense technologies, Motion models, Commercial off the shelf technology, Systems modeling, Device simulation, Active isolation

PROCEEDINGS ARTICLE | July 26, 2004

Vibration control of flexible structures using MR and piezoceramic mounts

Proc. SPIE. 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Signal attenuation, Magnetism, Amplifiers, Control systems, Vibration control, Dynamical systems, Vibration isolation, Electromagnetism, Fluid dynamics

PROCEEDINGS ARTICLE | July 26, 2004

Application of CFD in the design and analysis of a piezoelectric hydraulic pump

Proc. SPIE. 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Aerospace engineering, Resistance, Smart structures, System integration, Smart materials

PROCEEDINGS ARTICLE | July 26, 2004

Bidirectional control of a magnetorheological piezohydraulic actuator

Proc. SPIE. 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Quantum wells, Aerospace engineering, Magnetism, Picosecond phenomena, Lanthanum, Performance modeling, Systems modeling, Prototyping, Wheatstone bridges

PROCEEDINGS ARTICLE | July 26, 2004

Wheel slip control of ABS using ER valve pressure modulator

Proc. SPIE. 5390, Smart Structures and Materials 2004: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Logic, Sensors, Control systems, Modulators, Bridges, Motion models, Fluid dynamics, Systems modeling, Device simulation

PROCEEDINGS ARTICLE | July 21, 2004

Rheological parameter estimation for a ferrous-nanoparticle-based magnetorheological fluid using genetic algorithms

Proc. SPIE. 5387, Smart Structures and Materials 2004: Active Materials: Behavior and Mechanics

KEYWORDS: Microfluidics, Genetic algorithms, Iron, Data modeling, Nanoparticles, Particles, Magnetism, Genetics, Binary data, Protactinium

PROCEEDINGS ARTICLE | August 5, 2003

Mitigation of biodynamic response to vibratory and blast-induced shock loads using magnetorheological seat suspensions

Proc. SPIE. 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems

KEYWORDS: Injuries, Signal attenuation, Complex systems, Head, Algorithm development, Motion models, Spine, Feedback control, Nonlinear control, Land mines

PROCEEDINGS ARTICLE | August 5, 2003

A magnetorheological hydraulic actuator driven by a piezopump

Proc. SPIE. 5056, Smart Structures and Materials 2003: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Aerospace engineering, Magnetism, Amplifiers, Power supplies, Control systems, Head, Performance modeling, Prototyping, Wheatstone bridges

SPIE Conference Volume | August 5, 2003

Smart Structures and Materials 2003: Smart Structures and Integrated Systems

PROCEEDINGS ARTICLE | July 31, 2003

Nondimensional quasi-steady analysis of magnetorheological dampers utilizing a Herschel-Bulkley model with preyield viscosity

Proc. SPIE. 5052, Smart Structures and Materials 2003: Damping and Isolation

KEYWORDS: Composites, Magnetism, Vibration control, Palladium, Smart structures, Motion models, Performance modeling, Fluid dynamics, Smart materials, Instrument modeling

PROCEEDINGS ARTICLE | July 31, 2003

Constitutive models of electrorheological and magnetorheological fluids using viscometers

Proc. SPIE. 5052, Smart Structures and Materials 2003: Damping and Isolation

KEYWORDS: Mathematical modeling, Microfluidics, Data modeling, Particles, Magnetism, Measurement devices, Bismuth, Smart structures, Fluid dynamics, Protactinium

PROCEEDINGS ARTICLE | July 31, 2003

Modeling of smart fluid dampers

Proc. SPIE. 5052, Smart Structures and Materials 2003: Damping and Isolation

KEYWORDS: Modeling, Data modeling, Amplifiers, Control systems, Vibration control, Process control, Simulink, Optical isolators, Performance modeling, Instrument modeling

PROCEEDINGS ARTICLE | July 31, 2003

Impact of varying concentrations of nanometer-sized particles in a bidisperse magnetorheological fluid

Proc. SPIE. 5052, Smart Structures and Materials 2003: Damping and Isolation

KEYWORDS: Microfluidics, Iron, Data modeling, Nanoparticles, Particles, Laser scattering, Magnetism, Photodiodes, Solids, Fluid dynamics

PROCEEDINGS ARTICLE | July 15, 2002

Performance of a MR hydraulic power actuation system

Proc. SPIE. 4701, Smart Structures and Materials 2002: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Aerospace engineering, Magnetism, Bridges, Picosecond phenomena, Lanthanum, Tellurium, Performance modeling, Prototyping, Wheatstone bridges

PROCEEDINGS ARTICLE | July 11, 2002

Magnetorheological fluids exploiting nanometer-sized particles

Proc. SPIE. 4699, Smart Structures and Materials 2002: Active Materials: Behavior and Mechanics

KEYWORDS: Microfluidics, Iron, Data modeling, Particles, Magnetism, Microwave radiation, Magnetorheological finishing, Fluid dynamics, Plasma, Protactinium

PROCEEDINGS ARTICLE | June 27, 2002

Electrorheological damper analysis using an Eyring-plastic model

Proc. SPIE. 4697, Smart Structures and Materials 2002: Damping and Isolation

KEYWORDS: Mathematical modeling, Actuators, Modeling, Data modeling, Electrodes, Head, Smart structures, Electronic filtering, Control systems design, Systems modeling

PROCEEDINGS ARTICLE | June 27, 2002

Comparative analysis of Bingham characteristics of ER/MR fluids with different viscometers

Proc. SPIE. 4697, Smart Structures and Materials 2002: Damping and Isolation

KEYWORDS: Aerospace engineering, Error analysis, Mathematics, Smart structures, Velocity measurements, Motion measurement, Fluid dynamics, Smart materials, Protactinium, Algorithms

PROCEEDINGS ARTICLE | June 27, 2002

Semi-active vibration isolation using magnetorheological isolators

Proc. SPIE. 4697, Smart Structures and Materials 2002: Damping and Isolation

KEYWORDS: Actuators, Complex systems, Manufacturing, Control systems, Motion models, Vibration isolation, Optical isolators, Performance modeling, Systems modeling, Design for manufacturability

PROCEEDINGS ARTICLE | August 16, 2001

Design of a MR hydraulic power actuation system

Proc. SPIE. 4327, Smart Structures and Materials 2001: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Magnetism, Head, Finite element methods, Bismuth, Lanthanum, Performance modeling, Systems modeling, Protactinium, Wheatstone bridges

PROCEEDINGS ARTICLE | July 2, 2001

Assessment of time response characteristics of electrorheological and magnetorheological dampers

Proc. SPIE. 4331, Smart Structures and Materials 2001: Damping and Isolation

KEYWORDS: Dielectrics, Magnetism, Head, Partial differential equations, Bismuth, Analytical research, Performance modeling, Fluid dynamics, Systems modeling, Protactinium

PROCEEDINGS ARTICLE | June 22, 2000

Bingham biplastic analysis of shear thinning and thickening in magnetorheological dampers

Proc. SPIE. 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems

KEYWORDS: Particles, Magnetism, Fourier transforms, Head, Chlorine, Fluid dynamics, Systems modeling, Smart materials, Digital Light Processing, Information operations

PROCEEDINGS ARTICLE | June 22, 2000

Design of a magnetorheological automotive shock absorber

Proc. SPIE. 3985, Smart Structures and Materials 2000: Smart Structures and Integrated Systems

KEYWORDS: Particles, Nitrogen, Magnetism, Control systems, Head, Differential equations, Smart structures, System integration, Fluid dynamics, Tin

SPIE Conference Volume | June 22, 2000

Smart Structures and Materials 2000: Smart Structures and Integrated Systems

PROCEEDINGS ARTICLE | April 27, 2000

Characterization and analysis of magneto-rheological damper behavior due to sinusoidal loading

Proc. SPIE. 3989, Smart Structures and Materials 2000: Damping and Isolation

KEYWORDS: Data modeling, Aerospace engineering, Magnetism, System identification, Analog electronics, Optimization (mathematics), Performance modeling, Fluid dynamics, Smart materials, General packet radio service

PROCEEDINGS ARTICLE | April 27, 2000

Analysis of electro- and magneto-rheological flow mode dampers using Herschel-Bulkley model

Proc. SPIE. 3989, Smart Structures and Materials 2000: Damping and Isolation

KEYWORDS: Data modeling, Aerospace engineering, Electrodes, Magnetism, Head, Aluminum, Dysprosium, Analytical research, Fluid dynamics, Smart materials

PROCEEDINGS ARTICLE | April 20, 2000

Seismic control of civil structures utilizing semiactive MR bracing systems

Proc. SPIE. 3988, Smart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways

KEYWORDS: Actuators, Magnetism, Control systems, Computer simulations, Electroluminescence, Buildings, Earthquakes, Analytical research, Systems modeling, Device simulation

PROCEEDINGS ARTICLE | June 9, 1999

Characterization of a magnetorheological fluid damper using a quasi-steady model

Proc. SPIE. 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems

KEYWORDS: Microfluidics, Data modeling, Electrodes, Particles, Magnetism, Head, Analytical research, Optimization (mathematics), Fluid dynamics, Systems modeling

SPIE Conference Volume | June 9, 1999

Smart Structures and Materials 1999: Smart Structures and Integrated Systems

PROCEEDINGS ARTICLE | June 9, 1999

Parametric analysis and testing of an electrorheological fluid damper

Proc. SPIE. 3668, Smart Structures and Materials 1999: Smart Structures and Integrated Systems

KEYWORDS: Curium, Electrodes, Manufacturing, Head, Solids, Aluminum, Analytical research, Chlorine, Performance modeling, Fluid dynamics

PROCEEDINGS ARTICLE | June 2, 1999

Steady-state sinusoidal behavior of elastomeric dampers

Proc. SPIE. 3672, Smart Structures and Materials 1999: Passive Damping and Isolation

KEYWORDS: Data modeling, Aerospace engineering, Silicon, Data acquisition, Thermal effects, System identification, Smart structures, Analytical research, Optimization (mathematics), Thermal modeling

PROCEEDINGS ARTICLE | June 2, 1999

Nonlinear damping identification from transient data

Proc. SPIE. 3672, Smart Structures and Materials 1999: Passive Damping and Isolation

KEYWORDS: MATLAB, Statistical analysis, Error analysis, Composites, Complex systems, Spectral resolution, Analytical research, Signal analyzers, Phase shifts, Data analysis

To study new damping augmentation methods for helicopter rotor systems, accurate and reliable nonlinear damping identification techniques are needed. For example, current studies on applications of magnetorheological (MR) dampers for rotor stability augmentation suggest that a strong Coulomb damping characteristic will be manifested as the field applied to the MR fluid is maximized. Therefore, in this work, a single degree of freedom (SDOF) system having either nonlinear Coulomb or quadratic damping is considered. This paper evaluates three analyses for identifying damping from transient test data; an FFT-based moving block analysis, an analysis based on a periodic Fourier series decomposition, and a Hilbert transform based technique. Analytical studies are used to determine the effects of block length, noise, and error in identified modal frequency on the accuracy of the identified damping level. The FFT-based moving block has unacceptable performance for systems with nonlinear damping. These problems were remedied in the Fourier series based analysis and acceptable performance is obtained for nonlinear damping identification from both this technique and the Hilbert transform based method. To more closely simulate a helicopter rotor system test, these techniques were then applied to a signal composed of two closely spaced modes. This data was developed to simulate a response containing the first lag and 1/rev modes. The primary mode of interest (simulated lag mode) had either Coulomb or quadratic damping, and the close mode (1/rev) was either undamped or had a specified viscous damping level. A comprehensive evaluation of the effects of close mode amplitude, frequency, and damping level was performed. A classifier was also developed to identify the dominant damping mechanism in a signal of 'unknown' composition. This classifier is based on the LMS error of a fit of the analytical envelope expression to the experimentally identified envelope signal. In most instances, the classifier identifies the damping mechanism correctly, erring only when the close mode significantly affects the envelope signal.

PROCEEDINGS ARTICLE | June 2, 1999

Piezoactuation of sandwich plates with viscoelastic cores

Proc. SPIE. 3672, Smart Structures and Materials 1999: Passive Damping and Isolation

KEYWORDS: Actuators, Data modeling, Aerospace engineering, Interfaces, Aluminum, Dysprosium, Analytical research, Motion analysis, Americium, Temperature metrology

PROCEEDINGS ARTICLE | July 27, 1998

Characterization of semiactive magnetorheological helicopter lag mode dampers

Proc. SPIE. 3329, Smart Structures and Materials 1998: Smart Structures and Integrated Systems

KEYWORDS: Data modeling, Sensors, Complex systems, Magnetism, Fourier transforms, Dynamical systems, Motion models, Performance modeling, Fluid dynamics, Smart materials

PROCEEDINGS ARTICLE | June 16, 1998

Dynamic characterization and analysis of magnetorheological damper behavior

Proc. SPIE. 3327, Smart Structures and Materials 1998: Passive Damping and Isolation

KEYWORDS: Switching, Data modeling, Magnetism, Interference (communication), System identification, Shape analysis, Analog electronics, Optimization (mathematics), Fluid dynamics, General packet radio service

PROCEEDINGS ARTICLE | June 16, 1998

Frequency response of beams with passively constrained damping layers and piezoactuators

Proc. SPIE. 3327, Smart Structures and Materials 1998: Passive Damping and Isolation

KEYWORDS: Actuators, Error analysis, Control systems, 3D modeling, Wave propagation, Differential equations, Finite element methods, Aluminum, Analytical research, Motion models

PROCEEDINGS ARTICLE | June 16, 1998

Analysis and testing of electrorheological bypass dampers

Proc. SPIE. 3327, Smart Structures and Materials 1998: Passive Damping and Isolation

KEYWORDS: Data modeling, Electrodes, Manufacturing, Head, Solids, Aluminum, Bismuth, Analytical research, Velocity measurements, Fluid dynamics

PROCEEDINGS ARTICLE | June 6, 1997

Overview of smart structures and integrated systems: 1997

Proc. SPIE. 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Sensors, Control systems, Data processing, Vibration control, Sensing systems, Smart structures, Active remote sensing, Acoustics, System integration

PROCEEDINGS ARTICLE | May 9, 1997

Modeling and experimental validation of a sandwich plate with isotropic face plates and viscoelestic core

Proc. SPIE. 3045, Smart Structures and Materials 1997: Passive Damping and Isolation

KEYWORDS: Actuators, Sun, Aerospace engineering, Interfaces, Differential equations, Aluminum, Analytical research, Motion models, Information operations, Protactinium

PROCEEDINGS ARTICLE | May 9, 1997

Nonlinear modeling and performance prediction of electrorheological fluid dampers

Proc. SPIE. 3045, Smart Structures and Materials 1997: Passive Damping and Isolation

KEYWORDS: Switching, Data modeling, Electrodes, Differential equations, Fermium, Aluminum, Performance modeling, Fluid dynamics, Systems modeling, Smart materials

PROCEEDINGS ARTICLE | May 1, 1996

System identification of ER fluid dampers using a nonlinear mechanisms-based model

Proc. SPIE. 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems

KEYWORDS: Data modeling, Aerospace engineering, Electrodes, Magnetism, Solids, System identification, Analog electronics, Motion models, Optimization (mathematics), Fluid dynamics

PROCEEDINGS ARTICLE | May 1, 1996

Hybrid passive/active damping for robust multivariable acoustic control in composite plates

Proc. SPIE. 2717, Smart Structures and Materials 1996: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Sensors, Signal attenuation, Denoising, Composites, Manufacturing, Transducers, Adaptive control, Acoustics, Filtering (signal processing)

PROCEEDINGS ARTICLE | May 8, 1995

Development of ER fluid-based actuators for rotorcraft flexbeam applications

Proc. SPIE. 2443, Smart Structures and Materials 1995: Smart Structures and Integrated Systems

KEYWORDS: Actuators, Aerospace engineering, Electrodes, Resistance, Control systems, Nomenclature, Solids, Performance modeling, Systems modeling, Information operations

PROCEEDINGS ARTICLE | May 6, 1994

Active damping of flexible rotor blade dynamics using electrorheological-fluid-based actuators

Proc. SPIE. 2190, Smart Structures and Materials 1994: Smart Structures and Intelligent Systems

KEYWORDS: Actuators, Aerospace engineering, Electrodes, Copper, Composites, Silicon, Electroluminescence, Vibration control, Epoxies, Fluid dynamics

Showing 5 of 61 publications

Conference Committee Involvement (28)

Active and Passive Smart Structures and Integrated Systems XIII

3 March 2019 | Denver, Colorado, United States

Active and Passive Smart Structures and Integrated Systems XII

5 March 2018 | Denver, Colorado, United States

Active and Passive Smart Structures and Integrated Systems XI

26 March 2017 | Portland, Oregon, United States

Active and Passive Smart Structures and Integrated Systems X

21 March 2016 | Las Vegas, Nevada, United States

Active and Passive Smart Structures and Integrated Systems IX

9 March 2015 | San Diego, California, United States

Showing 5 of 28 published special sections

Course Instructor

SC129: Smart Structures: Theory and Applications

A smart structure incorporates distributed actuators and sensors and contains the data processing and power conditioning capability. It has the capability to respond to a changing external environment to a changing internal environment. The course covers fundamentals of smart structures, describes the state-of-the-art in various areas and show applications to various systems.

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