Study On The Vibration Reduction Method Of Elevator Residual Vibration

With the continuous emergence of high-rise buildings,compared with traditional elevators,high-speed elevators have a higher working speed and greater lifting power,but this also brings greater vibration.High-speed elevators produce larger vibration amplitude,wider frequency spectrum,and higher energy density.Compared with the vibration of traditional elevators,this kind of vibration often exhibits resonance,so it is easy to harm the equipment and reduce the reliability and safety of the equipment.The vibration of high-speed elevators can be divided into three dimensions: horizontal vibration and vertical vibration.The longitudinal vibration is generally the flexible residual vibration caused by the impact of the impact force,and the longitudinal and lateral vibration are usually coupled vibrations generated by random excitation.In this paper,the author focuses on the analysis of the following aspects:(1)In order to study the longitudinal vibration phenomenon in high-speed elevators,starting from the vibration mechanism,the main properties of high-speed elevators in the time-varying phase and flexible residual vibration are studied in detail,and a high-speed elevator with a flexible dissipation factor can be created.Mathematical expressions of mechanics.The step signal is the impact load,and it is used as an external excitation.This mathematical expression is calculated by the Duhamel integral method,and the generalized coordinate system is used to solve the flexible residual vibration of the high-speed elevator in the two processes of acceleration and deceleration.(2)Create a high-speed elevator time-varying dynamic model,which is very different from the flexible residual model of scholars in traditional research,and compare and analyze these differences to study the strengths and weaknesses and applicable intervals of different models.The basic solution system selected in this paper is the free and fixed modal function at the lower end.The impact load is characterized by a step signal,and the solution result of the vibration function is solved.When comparing with other longitudinal vibrations,the author’s model is better than The basic model has a higher degree of complexity,and the equation solving process is also longer.In the process of studying the longitudinal vibration data of high-speed elevators,the introduction of the more effective data of the strong formal analytical solution of the system greatly facilitates the study of the longitudinal vibration properties of high-speed elevators and the solution of active vibration reduction algorithms.(3)According to the characteristics of the flexible components in the elevator components,a time-controlled dynamics model is established.The impact load of this model is expressed by a step signal.Then the solution that the vibration equation accords with is solved.In view of the special features of the elevator vibration response process,from the perspective of physics,we hope to derive a control algorithm suitable for the current high-speed elevators.This algorithm can carry out the control signal of the elevator and the shaping signal of the motor.Comprehensive analysis,a new control signal is obtained under the calculation of the algorithm.(4)In-depth analysis of the fluctuation of the center of mass caused by the separation of the high-speed elevator car frame.Using the test system and finite element dynamic analysis software,the fluctuation phenomenon of the position of the center of mass is analyzed.By comparing the difference in frequency between these two methods,the data obtained by the two methods are compared.(5)In the dynamic research of the elevator rapid design system,the Gauss integral calculation of the high-speed elevator dynamics model W,the multi-directional coupling vibration technology of the high-speed elevator system in the dynamic modeling technology,and the vibration reduction technology Cutting-edge technology in high-speed elevators.In this system,the main parameters are used to obtain the working data and structural data of the elevator,the analysis model is established,and the RBF neural network method,the Latin hypercube test technology and the Gaussian precision integration method are used to construct the longitudinal residual of the high-speed elevator.A model is developed that includes the optimization of multi-objective particle swarms.And solve the best value of each parameter in the system,and introduce these data into the ADAMS software for simulation test.Vibration damping is performed by input shaping control,and lateral random vibration is damped by robust variance control technology.The damping effect of the two methods is very significant.