Journal ArticleDOI
SPICE model for lossy piezoelectric polymers
Ravinder Dahiya,Maurizio Valle,Giorgio Metta,Leandro Lorenzelli +3 more
- Vol. 56, Iss: 2, pp 387-395
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TLDR
The simulated impedance and phase plots of polymer, working in thickness mode, have been compared with measured data and the equivalent circuit parameters are derived from analogies between lossy electrical transmission line and acoustic wave propagation.Abstract:
This work presents the transmission line equivalent model for lossy piezoelectric polymers and its SPICE implementation. The model includes the mechanical/viscoelastic, dielectric/electrical, and piezoelectric/electromechanical losses in a novel way by using complex elastic, dielectric, and piezoelectric constants obtained from the measured impedances of PVDF and PVDF-TrFE samples by nonlinear regression technique. The equivalent circuit parameters are derived from analogies between a lossy electrical transmission line and acoustic wave propagation. The simulated impedance and phase plots of various samples, working in thickness mode, have been shown to agree well with the measured data.read more
Citations
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Tactile Sensing—From Humans to Humanoids
TL;DR: Tactile sensing, focused to fingertips and hands until past decade or so, has now been extended to whole body, even though many issues remain open, and various system issues that keep tactile sensing away from widespread utility are discussed.
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Directions Toward Effective Utilization of Tactile Skin: A Review
TL;DR: The state of the art and the research issues in tactile sensing, with the emphasis on effective utilization of tactile sensors in robotic systems are surveyed, recognizing the fact that the system performance tends to depend on how its various components are put together.
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Driving high voltage piezoelectric actuators in microrobotic applications
TL;DR: In this article, the authors describe electrical characteristics and drive requirements of low mass piezoelectric actuators, the design and optimization of suitable drive circuit topologies, aspects of the physical instantiation of these topologies including the fabrication of extremely lightweight magnetic components, and a custom, ultra low power integrated circuit that implements control functionality for the drive circuits.
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Piezoelectric oxide semiconductor field effect transistor touch sensing devices
TL;DR: In this article, a piezoelectric oxide semiconductor field effect transistor (POSFET) based touch sensing device is presented, which is fabricated by spin coating thin (∼2.5 μm) polyamide polymer film directly on to the gate area of a metal oxide (MOS) transistor.
Journal ArticleDOI
Towards Tactile Sensing System on Chip for Robotic Applications
Ravinder Dahiya,D. Cattin,Andrea Adami,Cristian Collini,Leonardo Barboni,Maurizio Valle,Leandro Lorenzelli,Roberto Oboe,Giorgio Metta,Francesca Brunetti +9 more
TL;DR: In this article, the authors presented the research on tactile sensing system on chip comprising of 5 × 5 array of Piezoelectric Oxide Semiconductor Field Effect Transistor (POSFET) devices and temperature sensors.
References
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Journal ArticleDOI
Transient Performance of a Piezoelectric Transducer
TL;DR: In this paper, transform calculus is used to solve several problems in which the transient response of a piezoelectric transducer is of interest, including the electrical signal produced by a step function of force, both for open-circuit and resistive loading at the electrical terminals.
Journal ArticleDOI
Electromechanical properties of polarized polyvinylidene fluoride films as studied by the piezoelectric resonance method
TL;DR: In this paper, the piezoelectric resonance was observed in free vibrators of uniaxially oriented polyvinylidene fluoride films polarized at high electric fields.
Journal ArticleDOI
Iterative Method for Accurate Determination of the Real and Imaginary Parts of the Materials Coefficients of Piezoelectric Ceramics
TL;DR: In this article, Gandolfo et al. discuss the use of SAW filters for low-loss frequency multiplexers and frequency synthesizers in electronic warfare systems, and present a method to connect them.
Journal ArticleDOI
Design considerations for piezoelectric polymer ultrasound transducers
TL;DR: New insight is presented into seven important considerations for the design of active piezoelectric polymer ultrasound transducer construction and packaging requirements, materials characterization and modeling, film thickness and active area design, electroding selection, backing material design, and front protection/matching layer design.
Journal ArticleDOI
Controlled-source analogous circuits and SPICE models for piezoelectric transducers
TL;DR: In this paper, transmission line analogous circuits for piezoelectric transducers are developed which employ controlled sources rather than the traditional transformer to model the coupling between the electrical and the mechanical systems.