Finite element modeling of piezoelectric actuators for active flow control applications

Mathew, Jose; Sankar, Bhavani V.; Cattafesta, Lou

doi:10.2514/6.2001-300

Cited by 9 publications

(4 citation statements)

References 9 publications

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“…The current work is an extension of a preliminary modeling and design study of piezoelectric actuators described in which a set of actuators were built and tested [10]. The dc response was predicted reasonably well by both finite element models, but there was a significant discrepancy between experimental and theoretical results for the natural frequencies, especially for large piezoelectric patch sizes ( L > 0:5).…”

Section: Experimental Setup and Proceduresmentioning

confidence: 84%

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Optimized Design of Piezoelectric Flap Actuators for Active Flow Control

et al. 2006

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Piezoelectric flap actuators are often used in active flow-control applications. However, effective design tools are lacking in the flow-control community. This paper discusses theoretical modeling, experimental validation, and optimal design of piezoelectric unimorph and bimorph flap actuators. First, two different finite element models are described. One is a simple beam model that assumes a perfect bond exists between the piezoelectric patch and the shim, whereas the second incorporates a linear elastic shear element for the bond layer. These models are then used to predict the magnitude of the dc response (tip displacement per unit applied voltage) and the natural frequency (a measure of the bandwidth) of these actuators. Next, an approximate analytical model is developed to facilitate design optimization. The models are compared with experimental data obtained from a parametric study in which 10 otherwise identical unimorph piezoelectric actuators with varying piezoelectric patches are fabricated and characterized using a laser displacement sensor. All models produce estimates that are accurate to within 15% and 10% for the dc response and natural frequency, respectively. The analytical model is also extended to bimorph actuators. Finally, a general design optimization procedure is presented, and representative results are provided.

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Section: Experimental Setup and Proceduresmentioning

confidence: 84%

“…A finite element model, similar to the one used for the perfect-bond model, was developed. The solution procedure is similar to that of the perfect-bond model, and the details are given in Mathew et al [10].…”

Section: Shear-lag Modelmentioning

confidence: 99%

Optimized Design of Piezoelectric Flap Actuators for Active Flow Control

et al. 2006

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“…The surrounding vibration sometimes could result in a small variation in the measured values, as could the cables. These factors should be borne in mind [6][7][8].…”

Section: Instrumentationmentioning

confidence: 99%

Experimental Measurement of Displacement and Vibration of Piezoelectric Smart Structures

Bendigeri

Hegde

Narayana³

et al. 2010

International Journal of Mechanical Engineering Education

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Recent advances in the field of distributed sensing and actuation have led to the development of new ‘smart structures’. A smart (or intelligent) structure is able to sense and respond, and control its own characteristics and state. Piezoelectric smart materials have gained popularity as both sensors and actuators. In the present work a new experimental set-up is described that was designed to carry out static and dynamic experimentation on piezoelectric smart structures. Four types of experiment were carried out; results were also determined using analytical methods. The comparison of the analytical and experimental results showed good agreement.

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“…Synthetic-jet actuators have been intensely studied over the past decade [1][2][3][4][5][6]. The scientific interest in these devices is elicited by their usefulness in fluid-control applications, including boundary-layer control, combustion control, mixture control etc.…”

Section: Introductionmentioning

confidence: 99%

Design of a single-crystal piezoceramic-driven synthetic jet actuator

Rusovici¹,

Lesieutre

2004

Smart Structures and Materials 2004: Smart Structures and Integrated Systems

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Synthetic-jet actuators have been intensely studied recently. The interest in these devices is elicited by their usefulness in fluid-control applications, including boundary-layer control, combustion control etc. A synthetic-jet actuator is a zero-net-mass-flux device, and is comprised of a diaphragm mounted to enclose a volume of fluid in a cavity. The diaphragm bends sinusoidally, and fluid is periodically absorbed into and ejected from the cavity through an orifice. The outflow entrains the fluid around it and establishes a mean jet flow at a distance from the source. Piezoceramic materials have been used to drive the vibrating diaphragm, where the piezoceramic is glued directly to a silicon diaphragm. In combustion systems, improved turbulent mixing of air and fuel proper can significantly improve efficiency and reduce pollution. In boundary-layer separation control applications, synthetic-jets are used to improve aerodynamic performance by delaying separation and stall over the airfoil. The current work describes the modeling and design of a single-crystal piezoceramic-driven synthetic-jet actuator, and demonstrates that the efficiency of the actuator increases when single-crystals piezoceramic materials are used instead of the more conventional polycrystalline piezoceramics.

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Finite element modeling of piezoelectric actuators for active flow control applications

Cited by 9 publications

References 9 publications

Optimized Design of Piezoelectric Flap Actuators for Active Flow Control

Optimized Design of Piezoelectric Flap Actuators for Active Flow Control

Experimental Measurement of Displacement and Vibration of Piezoelectric Smart Structures

Design of a single-crystal piezoceramic-driven synthetic jet actuator

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