Print Email Facebook Twitter Ortho-Planar Springs: Design of a zero stiffness mechanism for energy harvesting applications Title Ortho-Planar Springs: Design of a zero stiffness mechanism for energy harvesting applications Author Geerders, R. Contributor Tolou, N. (mentor) Faculty Mechanical, Maritime and Materials Engineering Department Precision and Microsystems Engineering Programme Mechatronic System Design Date 2015-08-28 Abstract Vibrational energy harvesters convert ambient kinetic energy into electrical energy that can be used to power electronic devices. Harvesting in the low frequency range over a wide bandwidth proves to be a challenging task. In this paper it is argued that stiffness cancellation can be used to effectively operate in this range. A conceptual design of a compact zero stiffness mechanism that can be used as suspension in an energy harvester is proposed, modeled and tested. The design is based on two ortho-planar springs with a spiral topology(diameter = 48,7 mm). Through application of a force prestress, a force reduction of 74,7% is achieved over an eight mm stroke perpendicular to the plane. Subject Energy harvestingOrtho-Planar Spring To reference this document use: http://resolver.tudelft.nl/uuid:65968738-e9de-4a22-b572-177d742da7e3 Embargo date 2019-08-28 Part of collection Student theses Document type master thesis Rights (c) 2015 Geerders, R. Files PDF Msc_Thesis_RGeerders.pdf 65.86 MB Close viewer /islandora/object/uuid:65968738-e9de-4a22-b572-177d742da7e3/datastream/OBJ/view