The Research On Synchronized Theory Of Vibration Machine Driven By Multi-motor

In modern mechanical system, which is composed of several parts,need synchronization, coordination and cooperation to accomplish the unified work task. In the field of vibratory machinery, it usually needs two or more motors working simultaneously and requires them having the same phase and speed in order to meet technological requirements.The research on the system synchronization for vibratory machinery plays a very important role in the application of modern engineering. It gives important theoretical meaning and practical value to research on the theory of vibratory machinery system, exploiting their application area and serving for engineering practice.Regarding the self-synchronization vibrating screens as the object of this paper, the synchronization theory of self-synchronization machines making plane movement has been researched. Aiming at the synchronization target of the system of multi-motor synchronization, applying the theory and methods for dynamic design of mechanical system, the theory of vibration synchronization and control synchronization, the theory of modern control, and modeling and simulation of system and so on, the modeling and analysis of dynamics has been performed for the vibration system and the condition of the synchronization and stability are obtained. Applying the similarity principle of logical thinking combined the traditional PID algorithm, fuzzy PID control algorithm of this model is built. Finally, the control system is simulated and analyzed by using control system toolbox in MATLAB and fuzzy logic toolbox in SIMULINK, the concrete contents is as follows:Regarding the self-synchronization shale shaker as the research object, the mechanical model of the self-synchronous vibrating machines in plane motion which simplified into "spring-quality" system is built. Referring to this mechanical model the vibrating equation of the vibration mechanical is obtained, motion path of the vibration mechanical in the same and opposite directions are deduced by dynamics and kinematics analysis, and the conditions of synchronization and stability have been deduced based on the equation of balanced moment of force, and the analysis of all kinds of results has been made. Based on this analysis, considering the movement condition of this system when two eccentric quality moment are unequal, the movement path and synchronization and stability conditions of special path has been deduced.And the effect of unequal eccentric quality to the system was analyzed.Other effects to self-synchronous mechanical have been analyzed by the means of experiments and simulation. Unloaded test has been carried out to ZZS40-70 linear vibrating screen and simulated test-bed. Vibration acceleration signal when starting and in steady state is measured. And motion characteristic, stability and influence factors have been researched and these work settle the foundation for the following study.If the adjustment and design still cannot realize self-synchronization, control synchronization will be considered. According to the character of vibrating mechanical, this paper presents fuzzy control plan by using microcontroler. The method of motor speed detection and hardware design are introduced in this paper. In order to achieve better synchronizing control precision, merits and shortcomings of every modern control method are compared and speed control scheme are selected. The result of simulation shows that the control system can attain the satisfied result. The PID controller and fuzzy PID controller are simulated in MATLAB and the emulation results are analyzed.The emulation result shows that this controller has better control result and stupid and excellent.