Distributed Sensing of a Cantilever Beam and Plate using a Fiber Optic Sensing System

Abstract

As the capabilities of Fiber Optic Sensing Systems continue to improve, their application to real-time distributed sensing for structural analysis and control of flexible systems is increasingly feasible. This paper will report experimental results on the use of a Fiber Optic Sensing System for static and dynamic shape estimation of a cantilever beam and plate. Demonstrating the use of this sensor technology in benchtop experiments is the first step in effectively incorporating fiber optic sensors in the Integrated Adaptive Wing Technology Maturation aeroelastic half-span wind tunnel model for real-time shape sensing and feedback for drag optimization, maneuver load alleviation, gust load alleviation, and flutter suppression control laws. The effectiveness of the sensing system will be analyzed and the application of these results to aeroelasticity experimentation will be discussed.

Modeling and experimental characterization of a multi-point loaded piezocomposite beam for actuation and energy harvesting

“…Comparisons of the experimental and analytical mode shapes for the multi-point configurations, shown later, indicate relatively close agreement despite this experimental excitation method. In addition, previous work using high-density strain measurements acquired from fiber optic strain sensors has indicated relatively small differences in the experimental fundamental mode shape for a cantilevered beam excited in the same manner (Heaney et al, 2018). Thus, although the support conditions are altered by adding the shaker, based on these previous and current results, the excitation method utilized here is deemed suitable for comparing the relative performance between the configurations.…”

Structural Impact of the Start-Up Sequence on Pelton Turbines Lifetime: Analytical Prediction and Polynomial Optimization

“…This simplified representation is widely employed in structural mechanics research concerning single-end-supported solid bodies. Typical examples are investigations on the structural behavior of aircraft wings, frequently reported in research papers and technical reports [27][28][29][30].…”

Hybrid Shell-Beam Inverse Finite Element Method for the Shape Sensing of Stiffened Thin-Walled Structures: Formulation and Experimental Validation on a Composite Wing-Shaped Panel

“…Structural displacements and rotations can be reconstructed by integrating experimental strains measured by a discrete set of sensors [7]. This approach, founded on the classical beam or plate theories, has been developed for one-dimensional (1D) beam [8,9] and two-dimensional (2D) plate structures [10] and applied to aeroelastic shape control applications [11]. Alternatively, the structural displacement field can be modeled as a weighted superposition of basis functions [12][13][14].…”