Download or read book Design and Nonlinear Dynamics of Piezoelectric Energy Harvesters written by Hichem Abdelmoula and published by . This book was released on 2017 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second, an innovative control strategy based on energy harvesting for efficiently suppressing galloping oscillations is proposed. The novel design enables the harvester of not only alleviating the oscillations of the primary structure but also enhancing the transformed vibrational energy. An analytical model for the coupled nonlinear dynamical system is established by utilizing the Euler-Lagrange principle and implementing the Galerkin discretization. The impacts of the electrical load resistance and tip mass of the energy harvester on the coupled frequency, damping, and the onset speed of instability of the coupled multi-mode system are investigated in details. The results show that there exists an optimal load resistance for each tip mass which maximizes the onset speed of galloping. For control purposes, it is found that there is a well-defined tip mass of the energy harvester at which the coupled system has the highest onset speed of instability and hence the bluff body has the lowest vibration amplitude for all considered load resistances. However, to efficiently harvest energy and control the bluff body, both the tip mass of the energy harvester and electrical load resistance can be accurately determined.