13 September 1994 Finite element modeling of three-dimensional integral sensors for the control of aeroelastic structures
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Proceedings Volume 2361, Second European Conference on Smart Structures and Materials; (1994) https://doi.org/10.1117/12.184862
Event: Smart Structures and Materials: Second European Conference, 1994, Glasgow, United Kingdom
Abstract
For control of structures with aeroelastic loads, torsion and bending must be sensed and controlled independently. Tailored piezoelectrics with skewed sensing axes can provide decoupled sensing of both bending and twist using the same set of sensors. This paper discusses the use of a finite element model to evaluate the effectiveness of anisotropic piezoelectric sensors for shape control sensing. Using a finite element representation for a plate-like structure covered by PVDF laminates, it is shown that integral sensors can accurately capture system independent bending and torsion displacement by measuring the induced electric charges without any additional signal processing efforts. The contribution of this work is to suggest an expression that relates sensed output from anisotropic sensors to plate of lifting surface bending and twist. An expression for the bending and torsion is tested with the finite element model. It is found that bending slope is accurately measured, but that twist is less likely to be accurately approximated by the sensor output.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
M. N. Abdul-Wahed, Terrence A. Weisshaar, "Finite element modeling of three-dimensional integral sensors for the control of aeroelastic structures", Proc. SPIE 2361, Second European Conference on Smart Structures and Materials, (13 September 1994); doi: 10.1117/12.184862; https://doi.org/10.1117/12.184862
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