A comparison of packaged piezoactuators for industrial applications

Pretorius, Jaco; Hugo, Marius; Spangler, Ronald L.

doi:10.1117/12.546789

Cited by 7 publications

(5 citation statements)

References 9 publications

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“…The signal generator produces voltage waveforms with up to 20 V peak-to-peak amplitude. Since the maximum drive voltage of the patch transducers is approximately 1000 V [14], an increase of the drive voltage amplitude is a simple way to increase the system power throughput beyond values reported in this article.…”

Section: Figure 3 Photograph Of the Three Types Of Piezoelectric Tramentioning

confidence: 82%

Wireless Energy Supply to Aircraft Structural Health Monitoring Nodes Using Ultrasonic Lamb Waves

Kural

2014

Fatigue of Aircraft Structures

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This article is based on research done during the author’s PhD at Cardiff University, UK. A prototype of a novel wireless energy transmission system aimed at the use with wireless aircraft structural health monitoring (SHM) sensor nodes is described. The system uses ultrasonic guided plate waves (Lamb waves) to transmit energy along an aluminium plate, similar to those used in aircraft structures. Three types of piezoelectric transducers generating and receiving the ultrasonic vibration were compared. The Smart Material MFC M8528-P1 was found to achieve the best performance, allowing the transmission of 17 mW across a 54 cm distance, while being driven with a 20 V signal. Laser vibrometer imaging and LISA software simulation of the Lamb wave propagation in the experimental plate were also performed. Based on these, ideas for a further development of the system were proposed.

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Section: Figure 3 Photograph Of the Three Types Of Piezoelectric Tramentioning

confidence: 82%

Wireless Energy Supply to Aircraft Structural Health Monitoring Nodes Using Ultrasonic Lamb Waves

Kural

2014

Fatigue of Aircraft Structures

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“…Recent work carried out at Cardiff University showed that they perform well up to several hundreds of kilohertz, both in the damage detection and the power transmission applications. Due to the low thickness (~0.25 mm) of the piezoelectric material [4] and the dense distribution of electrodes on its surface, the electric field magnitude and consequently the piezoelectric effect in patch transducers is stronger than in crystal transducers. Patch transducers are also fairly flexible and therefore do not have a recognizable resonance frequency (at least in the frequency range investigated in author's work, i.e.…”

Section: Electric Impedance Characterisation Of Piezoelectric Transdu...mentioning

confidence: 99%

Wireless Power Transmission Using Ultrasonic Guided Waves – Electric Circuit Measurement and Simulation

Kural

Pullin

Featherston

et al. 2012

KEM

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A project investigating the possibility to transmit electrical power (several mW) along the structure of an aircraft by using an intermediate medium of ultrasonic Lamb waves is being carried out at Cardiff University in conjunction with Airbus. This power supply method is aimed at wireless, surface-bonded sensor packages, primarily for the aircraft structural health monitoring (SHM) applications. It is expected to replace conventional batteries or energy harvesting devices. This paper presents methods of piezoelectric transducer characterisation, electric power measurement and electric circuit simulation that were developed in support of the ultrasonic power transmission project. The unique combination of low power and a high AC frequency range (up to 200 kHz) precluded the use of conventional power measurement instruments and called for a tailored system and software to be developed. Two approaches were developed: one relying on the measurement of the ultrasonic transducers impedance characteristics and their subsequent use in a circuit simulation; and another relying on the direct measurement of voltage waveforms in the power transmission setup. The two methods were found to be capable of producing closely matching results up to 300 kHz. Results of early power transmission trials are also presented. The optimum approach resulted in 1 mW of power transmission over a distance of 74 cm in a 1.5 mm thick aluminium plate.

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“…temperature, humidity, calibration issues) of both the manufacturer and the authors of this work. In fact, contrasting information from the same manufacturer [31,32] indicate that true values might differ from those specified by as much as 37%. • Performing a curve fit for d 31 in figure 14, a polynomial equation can be obtained, thus obtaining a polynomial function for n em using equations ( 26) and (27).…”

Section: Non-linear Voltage-strain Measurementsmentioning

confidence: 99%

“…This variation increases for tensile loads and decreases for compressive loads, until the so-called Buckling load [36][37][38][39] is reached. The Buckling load P b for a cantilever beam is defined in equation (31), where E, I and L are the Young modulus, moment of inertia and beam's length respectively.…”

Section: Mechanical Interactionmentioning

confidence: 99%

A comprehensive model for piezoceramic actuators: modelling, validation and application

Quant

Elizalde

Flores

et al. 2009

Smart Mater. Struct.

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This paper presents a comprehensive model for piezoceramic actuators (PAs), which accounts for hysteresis, non-linear electric field and dynamic effects. The hysteresis model is based on the widely used general Maxwell slip model, while an enhanced electro-mechanical non-linear model replaces the linear constitutive equations commonly used. Further on, a linear second order model compensates the frequency response of the actuator. Each individual model is fully characterized from experimental data yielded by a specific PA, then incorporated into a comprehensive 'direct' model able to determine the output strain based on the applied input voltage, fully compensating the aforementioned effects, where the term 'direct' represents an electrical-to-mechanical operating path. The 'direct' model was implemented in a Matlab/Simulink environment and successfully validated via experimental results, exhibiting higher accuracy and simplicity than many published models. This simplicity would allow a straightforward inclusion of other behaviour such as creep, ageing, material non-linearity, etc, if such parameters are important for a particular application.Based on the same formulation, two other models are also presented: the first is an 'alternate' model intended to operate within a force-controlled scheme (instead of a displacement/position control), thus able to capture the complex mechanical interactions occurring between a PA and its host structure. The second development is an 'inverse' model, able to operate within an open-loop control scheme, that is, yielding a 'linearized' PA behaviour. The performance of the developed models is demonstrated via a numerical sample case simulated in Matlab/Simulink, consisting of a PA coupled to a simple mechanical system, aimed at shifting the natural frequency of the latter.

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A comparison of packaged piezoactuators for industrial applications

Cited by 7 publications

References 9 publications

Wireless Energy Supply to Aircraft Structural Health Monitoring Nodes Using Ultrasonic Lamb Waves

Wireless Energy Supply to Aircraft Structural Health Monitoring Nodes Using Ultrasonic Lamb Waves

Wireless Power Transmission Using Ultrasonic Guided Waves – Electric Circuit Measurement and Simulation

A comprehensive model for piezoceramic actuators: modelling, validation and application

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