Dynamic Modelling of a Controlled Orthotropic Plate: Analytic and Data-Driven Approaches in the Frequency Domain

TL;DR

This paper develops analytical and data-driven models for a vibrating orthotropic plate with piezosensors, using frequency domain methods to analyze its control system behavior and validate the models through numerical studies.

Contribution

It introduces a combined analytical and data-driven approach for modeling a piezo-sensor-equipped orthotropic plate in the frequency domain, including explicit transfer function evaluation.

Findings

Model accurately predicts input-output behavior within frequency range

Series expansion solutions using Krylov functions are effective

Finite-dimensional approximations show acceptable agreement

Abstract

This paper is devoted to the mathematical modelling of a vibrating orthotropic plate equipped with a laminated piezosensor, under the influence of a lumped force actuation. We employ the Kirchhoff plate theory to derive the corresponding partial differential equation, assuming free boundary conditions. Analytical solutions for this boundary value problem are explored in the form of series expansions, using products of Krylov functions. Utilizing Galerkin's method, this mathematical model is transformed into an infinite-dimensional control system characterized by modal coordinates. The transfer function of such a system is explicitly evaluated in the single-input single-output case. The computation of coefficients for finite-dimensional approximate systems is formalized in an algorithm with an arbitrary number of degrees of freedom. Our numerical study confirms that the modeled input-output behavior shows acceptable agreement over the given frequency range.