... of a lightweight absorbent material of high porosity. Moreover, they are active, so piezoelectric actuators in the form of thin patches are fixed to their faceplates. Therefore, the passive absorbent properties of porous core, effective at high and medium frequencies, can be combined with the active vibroacoustic...

... of unsymmetrical shell modes is also evaluated. actuators photovoltaic effects piezoelectric actuators piezoelectric materials shells (structures) vibration control 25 08 2010 12 07 2011 18 01 2012 18 01 2012 2012 American Society of Mechanical Engineers ...

...T. M. Seigler; A. H. Ghasemi The problem considered is that of solving for the control input that generates partly specified motion of a deformable structure with distributed piezoelectric actuation. The motion constraint, called the program constraint, is specified as a desired relation...

... Flaps ,” Ph.D. thesis, Pennsylvania State University, University Park, PA. Lester , H. , and Lefebvre , S. , 1993 , “ Piezoelectric Actuator Models for Active Sound and Vibration Control of Cylinders ,” J. Intell. Mater. Syst. Struct. 1045-389X , 4 , pp. 295 – 306 . 10.1177...

... that the control performance is significantly improved by increasing the width and reducing the thickness of the square actuator. 24 03 2009 15 01 2010 08 10 2010 08 10 2010 frequency response open loop systems piezoceramics piezoelectric actuators proportional control vibration...

... , J. W. and Wilkie , W. K. , “ Method of Fabricating NASA-Standard Macro-Fiber Composite Piezoelectric Actuators ,” NASA Report Nos. TM-2003-212427 and ARL-TR-2833. Hagood , N. W. , Kindel , R. , Ghandi , K. , and Gaudenzi , P. , 1993 , “ Improving Transverse...

.... In the proposed method, an array of one or more precharged capacitors is employed to provide a selection of various voltages, which may be selected to approximate a desired control signal defined by an LQR multimodal vibration controller. The capacitors can apply a control voltage to the piezoelectric actuators...

... microscopy. Along this line, this paper undertakes the problem of coupled flexural-torsional nonlinear vibrations of a piezoelectrically actuated microcantilever beam as a typical configuration utilized in these applications. The actuation and sensing are both facilitated through bonding a piezoelectric...

.... Furthermore, the importance of including local mass and stiffness effects is demonstrated. 08 06 2006 19 09 2006 damping finite element analysis mirrors piezoelectric actuators vibrations Membrane mirrors are thin, flexible, and lightweight optical surfaces used as satellite...

... with an experimental example to demonstrate the feasibility of the proposed procedure. Seeley , C. E. , and Chattopadhyay , A. , 1998 , “ Experimental Investigation of Composite Beams With Piezoelectric Actuation and Debonding ,” Smart Mater. Struct. 0964-1726 , 7 , pp. 502 – 511 . Wang...

... optimisation piezoelectric actuators sensors flexible linkage mechanism vibration control sensor actuator placement optimization Based on the complex modal theory, one obtains the state space form decoupled equations of motion as 5 x ̇ = A x + B 1 P + B 2 v α 6...

...Dimitris Varelis; Dimitris A. Saravanos A coupled theoretical and computational framework is presented for analyzing the small amplitude-free vibrational response of composite laminated plates with piezoelectric actuators and sensors, subject to nonlinear effects due to large rotations and initial...

...Eric M. Mockensturm; Raghavan Balaji One-way clutches and clutch bearings are being used in a wide variety of dynamic systems. Motivated by their recent use as ratchets in piezoelectric actuators and decoupling devices in serpentine belt drives, a method of analysis of systems containing one-way...

.... I. Friswell. 01 May 2002 01 March 2003 30 07 2004 laser velocimetry structural acoustics piezoceramics piezoelectric actuators piezoelectric transducers Composite materials offer enormous potential and benefits to the aerospace industry and many other sectors...

... . Manuscript received March 2003; Revised December 2003. Associate Editor: J. A. Main. 01 March 2003 01 December 2003 30 07 2004 structural acoustics vibrations vibration control composite materials piezoelectric actuators feedback damping electrorheology Vibrations...

... micromechanical devices vibrations piezoelectric actuators piezoelectric transducers Over the years, toroidal shells have been used or proposed for structures and/or components of tubular cooling systems, neutron accelerators, space telescopes, inflatable space structures, space colonies, etc. Effective...

... piezoelectric actuators beams (structures) flexible structures vibrations piezoelectric transducers Over the past few decades there has been a significant amount of research done in the area of active control of structural vibrations. A considerable part of this research effort has also focused...

...James D. Ervin, Graduate Student; Diann E. Brei, Assistant Professor, Assoc. Mem. ASME A new family of piezoelectric actuators, called Recurves, exhibits high work per volume and have the extra benefit of performance and packaging tailorability. The focus of this paper is the dynamic performance...

... direction. The active journal gas bearings used are of the tilting-pad type with one traditional passive pad and two active pads with embedded piezoelectric actuators. Feedback control systems are constructed with gap sensors for measuring the vibration of the rotor, embedded piezoelectric actuators...

... damping piezoceramics piezoelectric actuators Tuned piezoceramic resonant shunts have been adding damping to lightweight flexible structures for over two decades 1 2 3 . Recently, researchers have been investigating the use of piezoceramic switching shunts to add damping to structures...