Effect of Time-delayed Displacement Feedback on AMD Vibration Control under Seismic Excitation
A time-delayed displacement feedback is introduced to transform a traditional Tuned Mass Damper(TMD)system into an Active Mass Damper(AMD)system.The time delay and feedback gain coefficient are considered as adjustable control parameters for the AMD system.Firstly,the mechanical and mathematical models of the 2-degrees-of-freedom(2-DOF)coupling system with an AMD attached are established.Secondly,the stability of the system in the control parameter plane is determined using the eigenvalue analysis method.Finally,using Simulink simulations,the influence of control parameters on the vibration control effect of the AMD un-der EI Centro wave excitation is discussed,with evaluation indexes including the peak displacement response,peak acceleration re-sponse,root mean square(RMS)of displacement,and RMS of acceleration.The results show that the values of the control parameters determine the stability of the system with fixed physical parameters.An AMD with optimally tuned control parameters demonstrates a superior vibration control effect compared to a TMD.The seismic responses of both the primary structure and the damper are sup-pressed to varying degrees.However,if the control parameters are not optimally set,the vibration control effect of the AMD deteriorates.
Time-delayed displacement feedbackSeismic excitationStabilityVibration control
万方数据
维普
