Differences between plate theory and lumped element model in electrostatic analysis of one-sided and two-sided CMUTs with circular microplates

Saadatmand, Milad; Kook, Junghwan

doi:10.1007/s40430-020-02551-8

Cited by 7 publications

(8 citation statements)

References 31 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, the correct parameters of this mathematical expression according to the boundary conditions lead to the final solution. This approach is interesting since it avoids heavy numerical computations, if a valid analytical expression of the plate displacement is provided [30].…”

Section: Introductionmentioning

confidence: 99%

Lumped-Parameter Equivalent Circuit Modeling of CMUT Array Elements

Merrien

Boulme²,

Certon

2022

IEEE Open J. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

Design and modeling are key steps in the value chain of Capacitive Micromachined Ultrasonic Transducer (CMUT) arrays. Although CMUT array element models are very powerful, most of them are still limited in their use as tools for electronic design assistance. The electroacoustic equivalent circuits developed are mainly based on a distributed-element approach while lumped-parameter electrical circuits are better suited for electronic software design tools interoperations. To meet this need, the present study aims to implement an electroacoustic equivalent scheme of a full array element, based on a two-port network representation made of lumped-parameters. After an extensive bibliographical review of CMUT models, the new model is set-up from a fully distributed approach using Foldy's electroacoustic definitions at the element level. Transmit and receive modes are implemented using scalar equations given by the lumped parameters. Moreover, based on a reciprocity analysis, the performance of the complete measurement chain in emission and reception will be defined using the relevant transfer functions. Finally, to help one design CMUT array elements for a given application, a method based on the computation of membranes thickness-size master curves is proposed. The two-port network representation of a full CMUT-based array element allowed by the new lumped-parameter modeling opens a wide range of possibilities regarding array design, electronic integration, operations with acoustic propagation simulation tools and more.

show abstract

Section: Introductionmentioning

confidence: 99%

Lumped-Parameter Equivalent Circuit Modeling of CMUT Array Elements

Merrien

Boulme²,

Certon

2022

IEEE Open J. Ultrason., Ferroelect., Freq. Contr.

View full text Add to dashboard Cite

show abstract

“…In order to validate the result of this study, the pullin voltage is compared with [46]. However, there is a negligible difference between the values of pull-in voltage shown in Fig.…”

Section: Simulation Resultsmentioning

confidence: 88%

“…In this section, the obtained results are presented and discussed. In the first part, the modeling results of this study is validated by means of comparing with [46]. In the second part, through considering uncertainties and external disturbance, the strength and capabilities of proposed controller is demonstrated for χ d = 0.95.…”

Section: Simulation Resultsmentioning

confidence: 96%

Adaptive under-actuated control for capacitive micro-machined ultrasonic transducer based on an accurate nonlinear modeling

et al. 2022

View full text Add to dashboard Cite

A capacitive micromachined ultrasonic transducer (CMUT) due to many benefits is being considered as an imaging and therapeutic technology recently. The critical challenge here is to stabilize the system beyond the pull-in voltage considering imposed perturbations. The CMUT system, on the other hand, has a low range of travel and it is intrinsically unstable, which can result in a pull-in phenomenon. Consequently, in order to use the CMUT systems in a variety of medical applications that require high tuning ratio, a closedloop control technique has been designed for these systems aims at increasing the maximum capacitance and enhancing tunability as well. In this study, using the closed-loop control, the resistance of micro plate against the pull-in phenomenon has been examined. Also, in the description of the system a more accurate nonlinear modeling has been considered in the presence of an under-actuated sliding model control strategy with finite convergence time. Beside, adaptive protocols with unknown upper bounds have been designed to compensate the effects of uncertainty, unmodeled dynamics and external disturbances. The performance of controller in terms of improving output pressure, stabilizing the CMUT and its robustness to imposed perturbations have been investigated. Finally, numerical simulations

show abstract

“…Ultrasonic transducers based on capacitive switch structures are widely used in medical imaging, underwater tests, and obstacle detection. Saadatmand and Kook [ 97 ] conducted a theoretical analysis on electrostatically driven ultrasonic transducers with one-side and two-side circular plate structures and modified the voltage calculated by the lumped parameter model. Raeisifard et al [ 96 ] proposed a comprehensive model of cantilever switches under electrostatic and piezoelectric excitation.…”

Section: Reviewmentioning

confidence: 99%

Electrostatic pull-in application in flexible devices: A review

Cai¹,

Fang²,

Fang³

et al. 2022

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

The electrostatic pull-in effect is a common phenomenon and a key parameter in the design of microscale and nanoscale devices. Flexible electronic devices based on the pull-in effect have attracted increasing attention due to their unique ductility. This review summarizes nanoelectromechanical switches made by flexible materials and classifies and discusses their applications in, among others, radio frequency systems, microfluidic systems, and electrostatic discharge protection. It is supposed to give researchers a more comprehensive understanding of the pull-in phenomenon and the development of its applications. Also, the review is meant to provide a reference for engineers to design and optimize devices.

show abstract

Differences between plate theory and lumped element model in electrostatic analysis of one-sided and two-sided CMUTs with circular microplates

Cited by 7 publications

References 31 publications

Lumped-Parameter Equivalent Circuit Modeling of CMUT Array Elements

Lumped-Parameter Equivalent Circuit Modeling of CMUT Array Elements

Adaptive under-actuated control for capacitive micro-machined ultrasonic transducer based on an accurate nonlinear modeling

Electrostatic pull-in application in flexible devices: A review

Contact Info

Product

Resources

About