The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 07, 2014
Filed:
Dec. 09, 2008
Scott Hughes, Lakewood, CO (US);
Walter Musial, Boulder, CO (US);
Darris White, Port Orange, FL (US);
Scott Hughes, Lakewood, CO (US);
Walter Musial, Boulder, CO (US);
Darris White, Port Orange, FL (US);
Alliance for Sustainable Energy, LLC, Golden, CO (US);
Abstract
An apparatus () for fatigue testing test articles () including wind turbine blades. The apparatus () includes a test stand () that rigidly supports an end () of the test article (). An actuator assembly () is attached to the test article () and is adapted for substantially concurrently imparting first and second forcing functions in first and second directions on the test article (), with the first and second directions being perpendicular to a longitudinal axis. A controller () transmits first and second sets of displacement signals () to the actuator assembly () at two resonant frequencies of the test system (). The displacement signals () initiate the actuator assembly () to impart the forcing loads to concurrently oscillate the test article () in the first and second directions. With turbine blades, the blades () are resonant tested concurrently for fatigue in the flapwise and edgewise directions.