Topic
Piezoelectric sensor
About: Piezoelectric sensor is a research topic. Over the lifetime, 7127 publications have been published within this topic receiving 115903 citations.
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01 Apr 1993
TL;DR: Dynamic tactile sensing, which is defined as sensing during motion for perception of high spatial and temporal frequencies, is presented and one type of dynamic tactile sensor, the stress rate sensor, is described in detail.
Abstract: Dynamic tactile sensing, which is defined as sensing during motion for perception of high spatial and temporal frequencies, is presented. Applications include sensing fine surface features and textures and monitoring contact conditions for dextrous manipulation. One type of dynamic tactile sensor, the stress rate sensor, is described in detail. It uses piezoelectric polymer transducers to measure the changes in stress induced in the sensor's rubber skin as it traverses small surface features and textures. The signals are interpreted with the aid of a solid mechanics model of the contact interaction and a linear deconvolution filter. Experimental verification of the sensor's performance, including the detection of surface features only 6.5 mu m high, are presented. >
212 citations
TL;DR: In this paper, a finite element model based on the classical laminated plate theory is developed for the active vibration control of a composite plate containing distributed piezoelectric sensors and actuators.
Abstract: A finite-element model based on the classical laminated plate theory is developed for the active vibration control of a composite plate containing distributed piezoelectric sensors and actuators. The formulation is derived from the variational principle. The piezoelectrics' mass and stiffness are taken into account in the present model. A simple negative velocity feedback control algorithm coupling the direct and converse piezoelectric effects is used to actively control the dynamic response of an integrated structure through a closed control loop. The static analysis and active vibration suppression of a cantilever composite plate are performed as a numerical example to verify the proposed model. The modal superposition technique and the Newmark- method are used in the numerical simulation to calculate the dynamic response of the laminated composite plate.
209 citations
TL;DR: In this article, a broadband active shunt technique for controlling vibration in piezoelectric laminated structures is proposed, which is similar in nature to passive shunt damping techniques.
Abstract: In this paper a broadband active shunt technique for controlling vibration in piezoelectric laminated structures is proposed. The effect of the negative capacitance controller is studied theoretically and then validated experimentally on a piezoelectric laminated simply supported plate. The 'negative capacitance controller' is similar in nature to passive shunt damping techniques, as a single piezoelectric transducer is used to dampen multiple modes. While achieving comparable performance to that of the passive shunt schemes, the negative capacitance controller has a number of advantages. It is simpler to implement, less sensitive to environmental variations and can be considered as a broadband vibration absorber.
208 citations
TL;DR: In this article, piezoelectric ceramics patches are used as sensors and actuators to suppress the vibration of the smart flexible clamped plate, and an efficient control method by combining positive position feedback and proportional-derivative control is proposed for vibration reduction.
207 citations
TL;DR: In this article, a vibration-powered micro-generator based on a screen printed piezoelectric material was proposed for remote sensor systems, which can generate 2 µW for a vibration frequency of only 80 Hz.
Abstract: The use of alternative electrical energy sources to batteries is of particular significance to remote sensor systems. A vibration-powered micro-generator, based on a screen printed piezoelectric material, is proposed for this purpose. Theoretical and experimental results show that 2 µW can be generated for a vibration frequency of only 80 Hz. The device is not optimized and significant improvements are envisaged in the future.
206 citations