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 Posted: Sun 0:34, 08 May 2011 Post subject: hollister Elastic structure of the high-frequency |
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Elastic structure of the high-frequency controlled self-excited vibration
Account in the control mode truncation caused overflow, but the rate of cross-point of the flexible structure of negative feedback is not the case. Feedback loops and the actuator delay is to have a bit rate of negative feedback on the structure of the main reasons for high-frequency self-excited vibration. Under certain conditions,[link widoczny dla zalogowanych], as long as the feedback gain is large enough,[link widoczny dla zalogowanych], high self-excited vibration occurs. This self-excited vibration generated critical feedback gain is inversely proportional to the critical delay. References 1 Chung-Gu right horse buckle root,[link widoczny dla zalogowanych], Chen Weidong. Active vibration control. Beijing: National Defence Industry Press ,1997,176-1828 Hu Haiyan, DowellEH,[link widoczny dla zalogowanych], VirginLNStabilityestimationoflineardynamicalsystemsunderstatedelayfeedbackcontro1. JournalofSoundandVibration, 1998,2】 4 (3) :497 -5113 Hu Haiyan, DowellEH, VirginLN. Resonancesofaharmonicallyforcedduffingoscillatorwithtimedelayfeedbackcontro1. NonlinearDynamics, 1998,15 (4): 31l a 327Self-ExcitedVibrationofControlledElasticStructuresHuHaiyan (InstituteofVibrationEngineeringResearch, NanjingUniversityofAeronauticsandAstronauticsNanjing, 210016) AbstractThepaperpresentsthe [essonwhy8nelasticstructurewithnegativevelocityfeedbackmayhaveself-excitedvibrationofveryhighfrequencyItisprovedbyusingtheLyapunovfunctionthatthestructurewithcollocatednegativevelocityfeedbackisalwaysasymptoticallystablenomatterhowlargethefeedbackgainisseti. e,[link widoczny dla zalogowanych], thereisnospitlovercausedbythemodaltruncationinthedesignofvibrationcontrolHowever, noncollocatedpairofsensorandactuatormayresuttintheselfexcitedvibrationofveryhighfrequencyifthemeasuredvelocityisalwaysintheoppositedirectionofthefeedbackvelocity. Moreover, thetimedeLayfromthesensortotheactuatortakesanimportantroleintheoccurrenceofself-excitedvibration. Inthecaseofcollocatednegativevelocityfeedback, theserf-excitedvibrationmayhappenifatimedelay, albeitveryshort-existsinthefeedbackchannelandthefeedbackgainislargeenough. Keywards {activecontro [~ fimedelay; spiltover ~ self-excitedvibration of male Hu Haiyan Professor. October 1956 students.
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