Modal Analysis And Synchronization Control Of Dual Excitation System

In the aerospace, automotive, mining, metallurgy and other industrial fields, more and more standards are required about the strength, vibration characteristics and noise control of the product and the research on the vibration characteristics of mechanical or structural is becoming increasingly important. Modal analysis is an important means to obtain parameters of mechanical or structural by means of numerical calculating or experiment.On the other hand, the vibration motor is widely used as the power source of various vibration machines and in recent years, synchronized control of multiple motors become a hot topic in the field of machinery.In this paper, the dual vibrating motor vibration bed is selected as the research object, conduct research work about synchronization control of the double vibrating motor within resonance region (z≈0.8～0.9). Completed the 3D modeling work of vibration rig with solidworks and ues ANSYS spring unit to simulate support spring and use focus quality unit to take the weight of the dual vibrating motor into account, then, conduct calculated modal analysis of the dual vibrating motor vibration bed to obtaine the first six stage natural frequencies and mode shapes and get a deep understanding of the vibration characteristics of the vibration bed, thus provide a theoretical basis to determine the target synchronous speed of dual vibrating motors.This paper studies the synchronous control of dual vibrating motors on the basis of having a deep understanding of the vibration characteristics of the excitation bed. Making a detailed analysis of the parallel and master-slave control strategy which is commonly used in synchronous control of two-motors and conduct a detailed comparison and analysis about the traditional PID control algorithm and single neuron PID control algorithm, then determine to use master-slave synchronization control strategy and single neuron PID control algorithm to construct a control scheme of dual excitation motors according to the actual needs of this paper. The MATLAB simulation result shows the correctness of the single neuron PID control algorithm and synchronization control of the program.According to the synchronization control scheme of dual-motor metioned in this paper, build up the hardware synchronous control system of the dual vibrating motor with the available equipments in the laboratory and write the synchronous control software system to achieve real-time analysis of vibration data. Carry out synchronous control experiment of dual vibrating motors with natural state and affecded state and achieve the target of synchronization control of dual vibrating motors within resonance region (z≈0.8～0.9). This study effectively verify the correctness and effectiveness of the work.