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S21 Vibrações e Análise Modal |
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Title:
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FREQUENCY RESPONSE MEASUREMENT OF VIBRATION ELECTROMAGNETIC MICRO EXCITERS BY MEANS OF MLS AND
THE WIGNER DISTRIBUTION FUNCTION
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Summary :
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THE EXPERIMENTAL DETERMINATION OF PROPERTIES OR THE ACTIVE CONTROL OF VIBRATIONAL SYSTEMS REQUIRE THE APPLICATION OF SHAKING FORCES TO CONVENIENTS POINTS OF THE STRUCTURE, WHAT CAN BE DONE BY A VIBRATION ELECTROMAGNETIC EXCITER. IMPORTANT FEATURES OF SUCH A TRANSDUCER CAN BE DETERMINED BY ITS IMPULSE RESPONSE. ALTHOUGH THIS FUNCTION FULLY DETERMINES THE TRANSIENT BEHAVIOR OF THE EXCITER, THE MOST RELEVANT INFORMATION IS NOT EASILY VISUALIZED BY INSPECTION. SO, IN THE PAST, MANY TRANSFORMS OR MEASUREMENTS HAVE BEEN DEVELOPED FOR EVALUATION OF THE FREQUENCY RESPONSE OF SUCH DEVICES. THIS PAPER EXPLORES THE APPLICATION OF THE WIGNER DISTRIBUTION TO THE ANALYSIS OF VIBRATION EXCITERS, BASED IN THEIR IMPULSE RESPONSE MEASURED BY MAXIMUM LENGTH SEQUENCES. |
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Author :
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Feiteira, José Flávio
Medeiros, José Bismark
Vasconcelos, Halei Fagundes
Zindeluk, Moysés 0
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Paper View :
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