An isogeometric analysis based design of highly sensitive and precise omnidirectional piezoelectric-fiber accelerometer

Abstract

Measuring omnidirectional acceleration is highly important for robust control of the vehicle states. A novel omnidirectional accelerometer with three piezoelectric curved-fibers is designed by using the genetic algorithm based optimization method. The isogeometric analysis (IGA) is utilized to analyze the strain induced voltage outputs of curved piezoelectric fibers, which can also guarantee high computation accuracy and significantly reduce the amounts of calculation in the optimization procedure compared to the finite element method. Employing cylindrical piezoelectric three fibers, the cross-axis sensitivities of the x and z axes of the omnidirectional accelerometer is eliminated completely in theory, which ensures the detection precision of magnitude and direction of 3D acceleration. The output voltages of proposed curved three-fiber accelerometer in x and y axes respective are higher than the fully decoupled accelerometer with three orthogonal fibers. The sensor also exhibits high sensitivity in very low frequency range of [0.01 Hz, 5 Hz], and numerical simulated sensitivity can reach 7.42 to 13.41 V/g, which is 78% to 155% higher than that of the omnidirectional accelerometer with three parallel straight-fibers.

Design and simulation of micro piezoelectric fiber triaxial acceleration sensor

“…In this paper, a micro piezoelectric fiber accelerometer is designed. The piezoelectric ceramic fiber [4] with axial polarization [5] is used as the sensitive element. The piezoelectric strain constant d 33 can reach 346 pc/N, which has relatively good electromechanical coupling ability.…”

A Hermite interpolation element-free Galerkin method for piezoelectric materials

“…Piezoelectric materials are important functional materials with piezoelectric effect, which can realize the exchange of mechanical and electrical energy. The applications of the piezoelectric materials have expanded widely in aerospace, construction engineering, medical devices, and microelectronic technology because of their fast response, high sensitivity, and low cost (Kasem and Dowell, 2018; Shi et al, 2020; Wang et al, 2021). Due to the anisotropy and electromechanical coupling properties, there are many difficulties in performing the macro and micro experimental researches and accurate theoretical analysis on piezoelectric materials.…”

Analysis and Optimization of Suspension Spring Stiffness for Improving Frequency Response Characteristics of the Vehicle

“…e strain-induced voltage output of curved piezoelectric fibers is analyzed by isogeometric analysis (IGA), which guarantees higher computational accuracy compared to the finite element method [8]. Liu et al conducted a study of direct and iterative inversion methods for determining the spatial shear modulus distribution of elastic solids.…”