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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TL;DR: In this article, a decentralized robust vibration control with collocated piezoelectric actuator and strain sensor pairs is considered for spacecraft solar panel structures, where each actuator is driven individually by the output of the corresponding sensor so that only local feedback control is implemented.
Abstract: The decentralized robust vibration control with collocated piezoelectric actuator and strain sensor pairs is considered in this paper for spacecraft solar panel structures. Each actuator is driven individually by the output of the corresponding sensor so that only local feedback control is implemented, with each actuator, sensor and controller operating independently. Firstly, an optimal placement method for the location of the collocated piezoelectric actuator and strain gauge sensor pairs is developed based on the degree of observability and controllability indices for solar panel structures. Secondly, a decentralized robust controller is designed to suppress the vibration induced by external disturbance. Finally, a numerical comparison between centralized and decentralized control systems is performed in order to investigate their effectiveness to suppress vibration of the smart solar panel. The simulation results show that the vibration can be significantly suppressed with permitted actuator voltages by the controllers. The decentralized control system almost has the same disturbance attenuation level as the centralized control system with a bit higher control voltages. More importantly, the decentralized controller composed of four three-order systems is a better practical implementation than a high-order centralized controller is.
37 citations
TL;DR: In this paper, a new finite layer approach is proposed for the 3D static, vibration and stability analysis of piezoelectric composite plates, where Lagrangian polynomials are employed for the interpolations of all the generalized displacement components in the thickness direction.
Abstract: The finite layer method is the most efficient numerical method for three-dimensional analysis of simply supported rectangular plates. In this method, the plate is divided into a number of finite layers. Within each finite layer, trigonometric functions are used for the in-plane interpolations of displacements, whereas polynomials are employed for the interpolations in the thickness direction. Thus, the three-dimensional analysis is transformed into a series of one-dimensional analyses, and the efficiency is enhanced significantly. In the present study, a new finite layer approach is proposed for the three-dimensional static, vibration and stability analysis of piezoelectric composite plates. In this approach, Lagrangian polynomials are employed for the interpolations of all the generalized displacement components in the thickness direction. Thus, higher-order interpolations can be selected in order to yield improved accuracy over any existing higher-order shear deformation theories. Numerical results are presented to demonstrate the accuracy and efficiency of the proposed method. The static, vibration and stability behaviors of some piezoelectric laminates are also investigated through numerical examples.
37 citations
TL;DR: In this paper, an impact-type piezoelectric sensor was developed for real-time monitoring of grain sieve losses in combine harvesters, and the influence of grain shape, straw length and impact angle on variations of the maximum normal contact force and force rise-time were analyzed in detail.
37 citations
TL;DR: In this paper, the performance of the surface response to excitation (SuRE) method was evaluated with the conventional piezoelectric elements and scanning laser vibrometer used as contact and non-contact sensors, respectively, for monitoring the presence of loads on the surface.
37 citations
TL;DR: In this paper, a micromachined piezoelectric endoscopic tactile sensor is used to determine the properties of tissues in minimally invasive surgery, and a closed form expression is derived to express the relationship between the force ratio, compliance and the equivalent viscous damping of the tissue.
Abstract: In this paper, the design, analysis and fabrication of a micromachined piezoelectric endoscopic tactile sensor to determine the properties of tissues in minimally invasive surgery is presented The viscoelastic Kelvin model is employed for tissue characterization A closed form expression is derived to express the relationship between the force ratio, compliance and the equivalent viscous damping of the tissue The designed sensor uses a PVDF film as its sensing element The sensor consists of rigid and compliant elements which are mounted on the tip of an endoscopic surgical grasper tool The relative force between adjacent parts of the contact object is used to measure the viscoelastic properties experimentally
37 citations