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An Adjustable Stiffness Torsional Magnetic Spring With A Linear Stroke Length, Dawei Che, Jonathan Z. Bird, Alex Hagmüller, Md Emrad Hossain
An Adjustable Stiffness Torsional Magnetic Spring With A Linear Stroke Length, Dawei Che, Jonathan Z. Bird, Alex Hagmüller, Md Emrad Hossain
Electrical and Computer Engineering Faculty Publications and Presentations
This paper presents the analysis, mechanical design, and proof-of-principle experimental testing of a new type of adjustable stiffness torsional magnetic spring for an ocean generator application. Unlike prior published designs the rotary magnetic spring is shown to have a highly linear adjustable stroke length. The presented torsional spring is experimentally shown to be able to create a ± 45° angular stroke range with a peak torque of ± 39.1 N·m. The stiffness is adjusted by using a stepper motor to axially adjust the axial magnet offset. The stepper motor contains a brake so that power is not expended when maintaining …
Development Of A Novel Quartz Crystal Microbalance Based On Distribution Of Mass Loading Area For Improving Mass Sensitivity, Siddharth Swaminathan
Development Of A Novel Quartz Crystal Microbalance Based On Distribution Of Mass Loading Area For Improving Mass Sensitivity, Siddharth Swaminathan
Electronic Theses and Dissertations
The growing concerns regarding atmospheric toxins and their detrimental effects on life establishes the necessity to identify and monitor them. Environmental monitoring demonstrates an effective method to controlling the impact of atmospheric pollutants using gas sensors. The Quartz Crystal Microbalance (QCM) is one such device which has been widely used for detecting microgram level mass changes in gas and liquid phase. In this research a novel approach to designing QCM electrode configurations based on distributing the mass loading area to improve the mass sensitivity is proposed. Conventional QCM designs comprise a circular electrode configuration with an evenly distributed mass loading …