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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, 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, Chen Weidong. Active vibration control. Beijing: National Defence Industry Press ,1997,176-1828 Hu Haiyan, DowellEH, VirginLNStabilityestimationoflineardynamicalsystemsunderstatedelayfeedbackcontro1. JournalofSoundandVibration, 1998,2】 4 (3) :497 -5113 Hu Haiyan, DowellEH, VirginLN. Resonancesofaharmonicallyforcedduffingoscillatorwithtimedelayfeedbackcontro1. NonlinearDynamics, 1998,15 (4): 31l a 327Self-ExcitedVibrationofControlledElasticStructuresHuHaiyan (InstituteofVibrationEngineeringResearch,[link widoczny dla zalogowanych], NanjingUniversityofAeronauticsandAstronauticsNanjing, 210016) AbstractThepaperpresentsthe [essonwhy8nelasticstructurewithnegativevelocityfeedbackmayhaveself-excitedvibrationofveryhighfrequencyItisprovedbyusingtheLyapunovfunctionthatthestructurewithcollocatednegativevelocityfeedbackisalwaysasymptoticallystablenomatterhowlargethefeedbackgainisseti. e, thereisnospitlovercausedbythemodaltruncationinthedesignofvibrationcontrolHowever, noncollocatedpairofsensorandactuatormayresuttintheselfexcitedvibrationofveryhighfrequencyifthemeasuredvelocityisalwaysintheoppositedirectionofthefeedbackvelocity. Moreover,[link widoczny dla zalogowanych], thetimedeLayfromthesensortotheactuatortakesanimportantroleintheoccurrenceofself-excitedvibration. Inthecaseofcollocatednegativevelocityfeedback,[link widoczny dla zalogowanych], theserf-excitedvibrationmayhappenifatimedelay,[link widoczny dla zalogowanych], albeitveryshort-existsinthefeedbackchannelandthefeedbackgainislargeenough. Keywards {activecontro [~ fimedelay; spiltover ~ self-excitedvibration of male Hu Haiyan Professor. October 1956 students.

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