Modal analysis of PATHFINDER unmanned air vehicle

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Description

An experimental modal analysis was performed on PATHFINDER, a 450-lb, 100-ft wing span, flying-wing-design aircraft powered by solar/electric motors. The aircraft was softly suspended and then excited using random input from a long-stroke shaker. Modal data was taken from 92 measurement locations on the aircraft using newly designed, lightweight, tri-axial accelerometers. A conventional PC-based data acquisition system provided data handling. Modal parameters were calculated, and animated mode shapes were produced using SMS STARStruct{trademark} Modal Analysis System software. The modal parameters will be used for validation of finite element models, optimum placement of onboard accelerometers during flight testing, and vibration isolation ... continued below

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9 p.

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Woehrle, T.G.; Costerus, B.W. & Lee, C.L. October 19, 1994.

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Description

An experimental modal analysis was performed on PATHFINDER, a 450-lb, 100-ft wing span, flying-wing-design aircraft powered by solar/electric motors. The aircraft was softly suspended and then excited using random input from a long-stroke shaker. Modal data was taken from 92 measurement locations on the aircraft using newly designed, lightweight, tri-axial accelerometers. A conventional PC-based data acquisition system provided data handling. Modal parameters were calculated, and animated mode shapes were produced using SMS STARStruct{trademark} Modal Analysis System software. The modal parameters will be used for validation of finite element models, optimum placement of onboard accelerometers during flight testing, and vibration isolation design of sensor platforms.

Physical Description

9 p.

Notes

OSTI as DE95014127

Source

  • International modal analysis conference, Nashville, TN (United States), 13-16 Feb 1995

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  • Other: DE95014127
  • Report No.: UCRL-JC--117457
  • Report No.: CONF-950240--5
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 79902
  • Archival Resource Key: ark:/67531/metadc742855

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  • October 19, 1994

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 23, 2016, 6:49 p.m.

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Woehrle, T.G.; Costerus, B.W. & Lee, C.L. Modal analysis of PATHFINDER unmanned air vehicle, article, October 19, 1994; California. (digital.library.unt.edu/ark:/67531/metadc742855/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.