Wind power harvester based on an aerodynamic double pendulum. (September 2022)

• Record Type: Journal Article
• Authors: Selyutskiy, Yury; Dosaev, Marat; Holub, Andrei; Ceccarelli, Marco
• Is Part Of: Proceedings of the Institution of Mechanical Engineers. Volume 236:Number 18(2022)
• Page Start: 10025
• Page End: 10032
• Publication Date: 2022-09
• Subjects: wind power harvesting -- aeroelasticity -- oscillations -- limit cycle -- stability; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/09544062221085483
• Languages: English
• ISSNs: 0954-4062

Abstract

Dynamics of an aerodynamic double pendulum coupled with a linear generator is considered. A cubic nonlinear spiral spring is installed in the first joint of the pendulum. Numerical simulation of the behavior of the pendulum is performed. It is shown that it is possible to choose parameters in such a way as to ensure the instability of the equilibrium and the existence of limit cycle oscillations. Such oscillations are required for the system to be capable of wind power harvesting. The influence of characteristics of the joint spring upon the amplitude and frequency of the cycles is analyzed. In particular, it is shown that the amplitude non-monotonically depends on the parameter characterizing the cubic nonlinearity of the stiffness. In the same time, frequency monotonically increases as this parameter increases. The influence of the system parameters upon the output power is estimated.