The Experts below are selected from a list of 2280 Experts worldwide ranked by ideXlab platform

Ji Wang - One of the best experts on this subject based on the ideXlab platform.

Jianke Du - One of the best experts on this subject based on the ideXlab platform.

Z K Wang - One of the best experts on this subject based on the ideXlab platform.

  • the propagation behavior of love waves in a functionally graded layered Piezoelectric Structure
    Smart Materials and Structures, 2005
    Co-Authors: Z K Wang
    Abstract:

    The propagation behavior of Love waves in a functionally graded layered Piezoelectric Structure is investigated in this paper. It involves a thin Piezoelectric layer, in which the parameters vary linearly in the thickness direction, bonded perfectly to an elastic substrate. By the WKB method, the phase velocity equations are obtained for both electrical open and short cases on the free surface, respectively. The results show that the circular frequency and cut-off frequency increase as the elastic modulus and dielectric constant vary linearly respectively; meanwhile, the number of vibration modes decreases, and the coupled electromechanical factor increases with the decrease of the dielectric constant. Undoubtedly, this is useful for the design of surface acoustic wave (SAW) devices.

  • effect of initial stress on the propagation behavior of love waves in a layered Piezoelectric Structure
    International Journal of Solids and Structures, 2001
    Co-Authors: Z K Wang, T J Wang
    Abstract:

    Abstract The propagation behavior of Love waves in a layered Piezoelectric Structure with an initial stress is investigated in this article. It involves a thin Piezoelectric layer bonded perfectly to an elastic substrate. Solutions of the mechanical displacement and electrical potential function are obtained for the Piezoelectric layer and elastic substrate by solving the coupled electromechanical field equations. The phase velocity equations of the Love wave propagation and the stress fields in the layered Piezoelectric Structure are obtained for electrical open and short cases on the free surface, respectively. The effect of the initial stress on the phase velocity, the stress fields and the coupled electromechanical factor are discussed, respectively. Three sets of Piezoelectric layer–elastic substrate systems are considered, i.e. BaTiO3 ceramic layer–borosilicate glass substrate, PZT-5H ceramic layer–borosilicate glass substrate, and PZT-5H ceramic layer–SiO2 glass substrate. It is seen that the phase velocity of the Love wave propagation decreases with the increase of the magnitude of the initial stress. The coupled electromechanical factor increases remarkably, as the magnitude of the initial the stress is greater than 100 MPa. This is useful for the design of acoustic surface wave devices.

Ravinder Dahiya - One of the best experts on this subject based on the ideXlab platform.

  • Prosthetic Hand with Biomimetic Tactile Sensing and Force Feedback
    2019 IEEE International Symposium on Circuits and Systems (ISCAS), 2019
    Co-Authors: William Taube Navaraj, Habib Nassar, Ravinder Dahiya
    Abstract:

    Tactile feedback is important to enhance the ability of amputees to interact with various objects. In this regard, this paper presents a 3D-printed prosthetic limb with integrated biomimetic tactile sensors coupled with a feedback actuation mechanism which is integrated to a myo-electric band on the residual limb. The static and dynamic tactile sensors on 3D-printed hand were realized by using a capacitive architecture in tandem with a Piezoelectric Structure. The capacitive sensing Structure exhibited non-linear characteristics with varying sensitivities of 0.25 kPa-1 in low pressure range (

  • Capacitive-Piezoelectric Tandem Architecture for Biomimetic Tactile Sensing in Prosthetic Hand
    2018 IEEE SENSORS, 2018
    Co-Authors: William Taube Navarai, Oliver Ozioko, Ravinder Dahiya
    Abstract:

    This paper presents our work on the development of a biomimetic tactile sensor and its integration with a 3D-printed prosthetic limb. Human tactile sensing involves sensing and processing of both static and dynamic stimuli. Here, a novel capacitive architecture in tandem with a Piezoelectric Structure has been used for achieving static and dynamic tactile sensing. Result of the capacitive sensing Structure's characteristics was found to be non-linear varying from high sensitivity of 0.25 kPa-1 in low pressure range(

Z B Kuang - One of the best experts on this subject based on the ideXlab platform.

  • propagation of bleustein gulyaev waves in a prestressed layered Piezoelectric Structure
    Ultrasonics, 2003
    Co-Authors: Z B Kuang
    Abstract:

    Abstract Based on the theories of nonlinear continuum mechanics, Piezoelectricity and elastic waves in solids, theoretical analysis of Bleustein–Gulyaev surface acoustic wave propagation in a prestressed layered Piezoelectric Structure are described. Numerical calculations are performed for the case that the layer and the substrate are identical LiNbO 3 except that they are polarized in opposite directions. It is found that an almost linear behavior of the relative change in phase velocity versus the initial stress is obtained for both surface electrically free and shorted cases. Potential applications in the design of acoustic wave devices are suggested.