The Experts below are selected from a list of 15315 Experts worldwide ranked by ideXlab platform

Heung Soo Kim - One of the best experts on this subject based on the ideXlab platform.

  • kirchhoff plate theory based electromechanically coupled analytical model considering inertia and stiffness effects of a surface bonded piezoelectric patch
    Smart Materials and Structures, 2016
    Co-Authors: Heonjun Yoon, Byeng D Youn, Heung Soo Kim
    Abstract:

    As a compact and durable design concept, piezoelectric energy harvesting skin (PEH skin) has been recently proposed for self-powered electronic device applications. This study aims to develop an electromechanically-coupled analytical model of PEH skin considering the inertia and stiffness effects of a piezoelectric patch. Based on Kirchhoff plate theory, Hamilton's principle is used to derive the electromechanically-coupled differential Equation of motion. Due to the geometric discontinuity of the piezoelectric patch, the Rayleigh–Ritz method is applied to calculate the natural frequency and corresponding mode shapes. The electrical Circuit Equation is derived from Gauss's law. Output voltage is estimated by solving the Equation of motion and electrical Circuit Equation, simultaneously. For the purpose of evaluating the predictive capability, the results of the electromechanically-coupled analytical model are compared with those of the finite element method in a hierarchical manner. The outstanding merits of the electromechanically-coupled analytical model of PEH skin are three-fold: (1) consideration of the inertia and stiffness effects of the piezoelectric patches; (2) physical parameterization between the two-dimensional mechanical configuration and piezoelectric transduction; (3) manipulability of the twisting modes of a cantilever plate with a small aspect ratio.

  • analysis of electromechanical performance of energy harvesting skin based on the kirchhoff plate theory
    ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, 2014
    Co-Authors: Heonjun Yoon, Byeng D Youn, Heung Soo Kim
    Abstract:

    As a compact and durable design concept, energy harvesting skin (EH skin), which consists of piezoelectric patches directly attached onto the surface of a vibrating structure as one embodiment, has been recently proposed. This study aims at developing an electromechanically-coupled analytical model of the EH skin so as to understand its electromechanical behavior and get physical insights about important design considerations. Based on the Kirchhoff plate theory, the Hamilton’s principle is used to derive the differential Equations of motion. The Rayleigh-Ritz method is implemented to calculate the natural frequency and the corresponding mode shapes of the EH skin. The electrical Circuit Equation is derived by substituting the piezoelectric constitutive relation into Gauss’s law. Finally, the steady-state output voltage is obtained by solving the differential Equations of motion and electrical Circuit Equation simultaneously. The results of the analytical model are verified by comparing those of the finite element analysis (FEA) in a hierarchical manner.Copyright © 2014 by ASME

Heonjun Yoon - One of the best experts on this subject based on the ideXlab platform.

  • kirchhoff plate theory based electromechanically coupled analytical model considering inertia and stiffness effects of a surface bonded piezoelectric patch
    Smart Materials and Structures, 2016
    Co-Authors: Heonjun Yoon, Byeng D Youn, Heung Soo Kim
    Abstract:

    As a compact and durable design concept, piezoelectric energy harvesting skin (PEH skin) has been recently proposed for self-powered electronic device applications. This study aims to develop an electromechanically-coupled analytical model of PEH skin considering the inertia and stiffness effects of a piezoelectric patch. Based on Kirchhoff plate theory, Hamilton's principle is used to derive the electromechanically-coupled differential Equation of motion. Due to the geometric discontinuity of the piezoelectric patch, the Rayleigh–Ritz method is applied to calculate the natural frequency and corresponding mode shapes. The electrical Circuit Equation is derived from Gauss's law. Output voltage is estimated by solving the Equation of motion and electrical Circuit Equation, simultaneously. For the purpose of evaluating the predictive capability, the results of the electromechanically-coupled analytical model are compared with those of the finite element method in a hierarchical manner. The outstanding merits of the electromechanically-coupled analytical model of PEH skin are three-fold: (1) consideration of the inertia and stiffness effects of the piezoelectric patches; (2) physical parameterization between the two-dimensional mechanical configuration and piezoelectric transduction; (3) manipulability of the twisting modes of a cantilever plate with a small aspect ratio.

  • analysis of electromechanical performance of energy harvesting skin based on the kirchhoff plate theory
    ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, 2014
    Co-Authors: Heonjun Yoon, Byeng D Youn, Heung Soo Kim
    Abstract:

    As a compact and durable design concept, energy harvesting skin (EH skin), which consists of piezoelectric patches directly attached onto the surface of a vibrating structure as one embodiment, has been recently proposed. This study aims at developing an electromechanically-coupled analytical model of the EH skin so as to understand its electromechanical behavior and get physical insights about important design considerations. Based on the Kirchhoff plate theory, the Hamilton’s principle is used to derive the differential Equations of motion. The Rayleigh-Ritz method is implemented to calculate the natural frequency and the corresponding mode shapes of the EH skin. The electrical Circuit Equation is derived by substituting the piezoelectric constitutive relation into Gauss’s law. Finally, the steady-state output voltage is obtained by solving the differential Equations of motion and electrical Circuit Equation simultaneously. The results of the analytical model are verified by comparing those of the finite element analysis (FEA) in a hierarchical manner.Copyright © 2014 by ASME

Xiaoya Li - One of the best experts on this subject based on the ideXlab platform.

  • stochastic averaging for bistable vibration energy harvesting system
    International Journal of Mechanical Sciences, 2018
    Co-Authors: Ming Xu, Xiaoya Li
    Abstract:

    Abstract Vibration energy harvesting technique provides the possibility of the development of self-sustaining microelectronic components. The bistable energy harvesting devices have higher efficiency than the traditional mono-stable devices and deserve further investigation. In this manuscript, a novel stochastic averaging procedure is established to evaluate the stationary random response of bistable energy harvester to additive and multiplicative white noises. An equivalent nonlinear system associated with the original coupling system is first derived by integrating the Circuit Equation and adopting the assumption of generalized harmonic functions of sample responses. The stationary probability density for mechanical energy of the equivalent nonlinear system is then derived through the stochastic averaging technique. The mean-square mechanical responses, the mean-square voltage and the mean output power are obtained analytically. Finally, the influences of crucial parameters, such as excitation intensity, coupling factor, time constant ratio etc., on mean-square voltage and mean output power are discussed in detail which may provide some guidance for structural design for maximizing output power.

Byeng D Youn - One of the best experts on this subject based on the ideXlab platform.

  • kirchhoff plate theory based electromechanically coupled analytical model considering inertia and stiffness effects of a surface bonded piezoelectric patch
    Smart Materials and Structures, 2016
    Co-Authors: Heonjun Yoon, Byeng D Youn, Heung Soo Kim
    Abstract:

    As a compact and durable design concept, piezoelectric energy harvesting skin (PEH skin) has been recently proposed for self-powered electronic device applications. This study aims to develop an electromechanically-coupled analytical model of PEH skin considering the inertia and stiffness effects of a piezoelectric patch. Based on Kirchhoff plate theory, Hamilton's principle is used to derive the electromechanically-coupled differential Equation of motion. Due to the geometric discontinuity of the piezoelectric patch, the Rayleigh–Ritz method is applied to calculate the natural frequency and corresponding mode shapes. The electrical Circuit Equation is derived from Gauss's law. Output voltage is estimated by solving the Equation of motion and electrical Circuit Equation, simultaneously. For the purpose of evaluating the predictive capability, the results of the electromechanically-coupled analytical model are compared with those of the finite element method in a hierarchical manner. The outstanding merits of the electromechanically-coupled analytical model of PEH skin are three-fold: (1) consideration of the inertia and stiffness effects of the piezoelectric patches; (2) physical parameterization between the two-dimensional mechanical configuration and piezoelectric transduction; (3) manipulability of the twisting modes of a cantilever plate with a small aspect ratio.

  • analysis of electromechanical performance of energy harvesting skin based on the kirchhoff plate theory
    ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, 2014
    Co-Authors: Heonjun Yoon, Byeng D Youn, Heung Soo Kim
    Abstract:

    As a compact and durable design concept, energy harvesting skin (EH skin), which consists of piezoelectric patches directly attached onto the surface of a vibrating structure as one embodiment, has been recently proposed. This study aims at developing an electromechanically-coupled analytical model of the EH skin so as to understand its electromechanical behavior and get physical insights about important design considerations. Based on the Kirchhoff plate theory, the Hamilton’s principle is used to derive the differential Equations of motion. The Rayleigh-Ritz method is implemented to calculate the natural frequency and the corresponding mode shapes of the EH skin. The electrical Circuit Equation is derived by substituting the piezoelectric constitutive relation into Gauss’s law. Finally, the steady-state output voltage is obtained by solving the differential Equations of motion and electrical Circuit Equation simultaneously. The results of the analytical model are verified by comparing those of the finite element analysis (FEA) in a hierarchical manner.Copyright © 2014 by ASME

Ming Xu - One of the best experts on this subject based on the ideXlab platform.

  • stochastic averaging for bistable vibration energy harvesting system
    International Journal of Mechanical Sciences, 2018
    Co-Authors: Ming Xu, Xiaoya Li
    Abstract:

    Abstract Vibration energy harvesting technique provides the possibility of the development of self-sustaining microelectronic components. The bistable energy harvesting devices have higher efficiency than the traditional mono-stable devices and deserve further investigation. In this manuscript, a novel stochastic averaging procedure is established to evaluate the stationary random response of bistable energy harvester to additive and multiplicative white noises. An equivalent nonlinear system associated with the original coupling system is first derived by integrating the Circuit Equation and adopting the assumption of generalized harmonic functions of sample responses. The stationary probability density for mechanical energy of the equivalent nonlinear system is then derived through the stochastic averaging technique. The mean-square mechanical responses, the mean-square voltage and the mean output power are obtained analytically. Finally, the influences of crucial parameters, such as excitation intensity, coupling factor, time constant ratio etc., on mean-square voltage and mean output power are discussed in detail which may provide some guidance for structural design for maximizing output power.