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Numerical investigations on the dynamic behaviour of a 2-DOF airfoil with application in energy harvesting system

Haniszewski Tomasz, Gąska Damian, Margielewicz Jerzy, Opasiak Tadeusz

Zeszyty Naukowe. Transport / Politechnika Śląska

2023

z. 118

77--91

This article presents the basic airfoil model with two degrees of freedom - the semi-rigid model, where its forced vibrations were considered, and the exciting force is the aerodynamic force, including its periodic changes, that is, gusts. Since the phenomenological model under study has a coupled form, its versions after decoupling are presented, which has an impact on the results of the final research. The airfoil model presented in this way was shown from the application side in the system of a simple energy harvester based on a deformable beam with piezoelectric elements. The result of the simulation tests is a preliminary analysis of the possibility of using the airfoil as a vibration generator for the energy harvesting system. Along with the application of the mechanical part, a numerical simulation of the electrical part was also implemented, related to the transformation of the voltage generated by piezoelectric elements into a constant voltage signal with a connected receiver with power consumption similar to the Atmega microcontroller with battery charging.

Control system of beam vibration using piezo elements

Gosiewski Z., Sochacki A.

Archives of Control Sciences

2003

Vol. 13, no. 3

375-385

In modern mechanical contructions active damping seems to be essential. But real mechanical contructions are complicated in shape and are composed of components with distributed parameters. That is why advanced modeling techniques should be implemented in the process of designing of vibration control system. In this paper we design a vibration control system for cantilever beam. As a sensor of the beam movement and as an actuator we use piezoelectric elements coupled with hardware of dSpace and software of Matlab-Simulink. The relations describing influence of piezo-actuator on the beam bending has been found. Measurement equation for piezo sensor was also prepared. Control system was designed for a few controlled modes. The influence of control system on non-controlled modes is considered.