# Elastic beam structure PVDF modal sensor generation method

## A technology of sensors and elastic beams, applied in the field of continuous distributed PVDF modal sensor generation, achieves the effects of simple signal processing, simple calculation, and strong versatility

Inactive Publication Date: 2018-06-15

HARBIN ENG UNIV

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## Abstract

The invention provides an elastic beam structure PVDF modal sensor generation method. The method comprises the following steps of: inputting a model parameter, generating a modal sensor charge equation, generating the modal sensor charging equation into a matrix form through inputting a flexibility coefficient, a shape function and an integral matrix of a modal sensor, calculating a shape coefficient of the modal sensor and calculating a vibration mode function by using a smooth Fourier expansion method so as to generate an effective electrode shape of the modal sensor; describing Lagrangian equations of total potential energy and total kinetic energy of an elastic beam structure, solving an extreme value of an unknown coefficient by utilizing Rayleigh-Ritz, generating K and M matrixes, generating a free vibration matrix equation of the elastic beam structure, calculating a feature vector of a feature value so as to generator an unknown coefficient vector, and generating a vibration mode function secondary derivative. According to the method, PVDF modal sensor design under classical boundary conditions and any constraint conditions can be realized through adjusting rigidity valuesof boundary springs, so that the method has the advantages of being strong in universality, high in calculation precision and high in convergence speed.

Application Domain

Design optimisation/simulationSpecial data processing applications

Technology Topic

Integral matrixModel parameters +11

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