Study On Active Vibration Control Of Double-layer Vibration Isolation System

An important part of the vibration engineering field is active vibration control.The effective control of harmful vibrations has always been the focus of research by scholars from various countries.Active control technology has become a very important way to reduce vibration because of its advantages such as good effect,strong adaptability and great potential.Based on the research background of active vibration control,this paper develops and applies a new controller system and develops a series of studies on active vibration control.There are not many researches on the modular controller in the existing active control research results.The modular controller has strengthened the reliability and maintainability of the control system,which is of great significance for the long-term use of the control system.In this paper,the modular controller is used to control the vibration of the continuous body system and the two-layer vibration isolation system.In the experiment process,the performance of the controller is improved and the vibration control effect is improved.This article will explore new methods of vibration control with new controllers and multiple controlled systems.The specific research content of the paper is as follows:Firstly,the design and development of the active vibration control system was completed,including the establishment of the system and the development of software algorithms.The main vibration control system is mainly composed of controlled objects,actuators and controllers.The controller is the core of the control system.The debug development of the controller includes: enabling cache settings,configuring a sleep management module,interrupt initialization,enabling DSP global interrupts,and the like.The controller is the most important part of the control experiment.The development and improvement of its performance will seriously affect the realization of the vibration control effect.Then the filtered x-LMS algorithm is deduced to simulate the single-channel and dual-channel conditions of the filtered x-LMS algorithm.The simulation results are good.Completion of this part of the algorithm simulation work is conducive to the smooth progress of vibration active control experiments.For the online error channel identification adaptive control algorithm to establish a theoretical model,and complete the simulation,have a good control effect.In contrast to the analysis of different kinds of control algorithms,this paper chooses x-LMS algorithm as the control algorithm of active vibration control experiment.To facilitate the study of continuum vibration response,a 25-degree-of-freedom mathematical model of the continuum was constructed,and a continuum system model was built at simulink.In this system model,error channel identification and multi-frequency superimposed vibration control simulation studies were completed.The simulation results were idealanditcan prepare for subsequent control experiments.In this paper,the active vibration control of beam structural system and double-layer vibration isolation system is studied.The first is to use the new control system to complete the single-channel and dual-channel coupling vibration active control experiment in the beam structure system,debug the controller system,and analyze and discuss the experimental results.Then we study the active vibration control of the double-layer vibration isolation system.In order to study its system characteristics,we have mathematically modeled the two-layer vibration isolation system and built a double-layer vibration isolation bench on the basis of modeling.The vibration isolation system completes the single-channel multi-frequency vibration active control experiment,the dual-channel coupled and uncoupled multi-frequency vibration active control experiments,and the four-channel coupling multi-frequency vibration active control experiment,and in the experimental process In the continuous optimization of control methods to improve the control effect.