Gyroscopically enhanced vertical axis pendulum for wave energy conversion

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The vertical axis pendulum is a type of point absorber device which can absorb wave energy from a width exceeding the physical width of the device. Mechanical power is harvested from the rotation of the pendulum, in which the pivot point is directly connected to the generator. In this paper, a new concept of the vertical axis pendulum device is proposed by adding a spinning flywheel to create a gyroscopic effect with the aim to enhance the motions of the pendulum. In the vertical axis of the pendulum, the reaction torque from the power take off (PTO) is included as a linear function of the pendulum rotation velocity to model the mechanical power conversion into electrical power. The initial spinning velocity of the flywheel is used as the parameter to obtain the maximum energy in the PTO. To demonstrate the effect of adding a flywheel to the pendulum system, two models are simulated and compared, i.e. a classical vertical axis pendulum and a ‘gyroscopic-pendulum’. The results of the comparison are presented in terms of the pendulum motions and the PTO converted power.
Original languageEnglish
Title of host publicationProceedings of the 13th European Wave and Tidal Energy Conference
Number of pages7
Publication statusPublished - 2019
EventEWTEC 2019: 13th European Wave and Tidal Energy Conference - Naples, Italy
Duration: 1 Sept 20196 Sept 2019

Publication series

NameProceedings of the European Wave and Tidal Energy Conference
ISSN (Print)2309-1983


ConferenceEWTEC 2019: 13th European Wave and Tidal Energy Conference
Internet address

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Coupled pendulum
  • gyroscopic effect
  • wave energy converter


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