Feedback Control To Suppress Excessive Vibration Of Two Typical Mechanical Structure Vibration Systems

Excessive vibration of the mechanical structure system will cause a series of safety problems.This work selects the macro and micro levels to carry out feedback control related research,and selects two typical mechanical structures that are widely used and highly differentiated in the industrial field,namely,Bridge crane and Micro resonator.For bridge cranes,the swing angle of the pendulum beyond a certain range will cause safety accidents such as decoupling and cargo tipping;for micro resonators,small disturbances may cause chaos and pull-in instability in the structure,leading to micro devices failure.Because micro-resonators are commonly used in autonomous vehicles,that as micro-inertial sensors,such complex phenomena can easily lead to automobile accidents;therefore,this article has potential applications in the field of engineering..According to the respective characteristics of the two structures,this paper adopts different feedback control methods to suppress excessive vibration.On the one hand,the complex mechanical model of the bridge crane is reasonably simplified to a two-dimensional plane,the global search of the gray wolf bionic algorithm is used to quickly find the optimal control parameters,a closed-loop control strategy is proposed,and the controller is verified by numerical simulation Effectiveness.On the other hand,a time-delay feedback control method is proposed for a kind of bilateral capacitive micro resonators with the homoclinic orbit heteroclinic orbit.By introducing a new time variable to analytically express the homoclinic orbit and heteroclinic orbit,on this basis,the Melnikov method is used to analyze the mechanism of the homoclinic bifurcation heteroclinic bifurcation and,and the experimental circuit is given through numerical simulation,so that the related research on suppressing excessive vibration of the microstructure is meaningful.