Research On Multi-axis Synchronization Control Strategy Of Four-axis Variable Trajectory Equal-thickness Vibrating Screen

Coal resources are the main energy resources in China,but without washing and processing,coal cannot be fully,efficiently and green utilization.Vibrating screen is one of the main equipment in the process of coal washing and processing,among which the equal-thickness vibrating screen is widely used because of its large handling capacity,high efficiency,high reliability and other advantages.At present,domestic coal mining toward the trend of centralization and large-scale development,so there is a great demand for large screening equipment,but the upsizing of the equal-thickness screen is not a simple enlargement,new designs,new approaches are needed.In view of this,based on the realization of multi-axis vibration screening method,the design of four-axis variable trajectory equal-thickness vibrating screen is carried out,which through the arrangement of multiple exciting shafts to produce vibration force in line with the specific requirements to achieve equal-thickness screening.In order to produce stable vibration force in line with the requirements,it is necessary to synchronize the exciting shafts.At present,the four-axis Variable trajectory equal-thickness vibrating screen adopts the way of mechanical gear for forced synchronization,which has drawbacks such as energy loss and wear of transmission parts,and the synchronization effect is not very ideal.In view of the requirements and problems faced by the four-axis Variable trajectory equal-thickness vibrating screen,this paper applies the multi-axis synchronous control theory to the synchronous control of the exciting shafts of the four-axis Variable trajectory equal-thickness vibrating screen,and studies the multi-axis synchronous control strategy of the four-axis Variable trajectory equal-thickness vibrating screen.The research plan is as follows:First of all,access to the relevant information,understand the working principle of the four-axis variable trajectory equal-thickness vibrating screen,perform vibration trajectory dynamics simulation,confirm its multi-axis synchronization requirements,analyze and compare multi-axis synchronization method;Secondly,according to the theory of multi-axis synchronization,study the control principle and method,establish simulation model of multi-axis synchronous control structure by MATLAB/Simulink,analyze the control scheme and the study control algorithm to select the appropriate multi-axis synchronous control structure by simulation method;Then,select the appropriate communication protocol,carry out communication control experiment on the Lab VIEW,communicate between Lab VIEW,sensor and controller.Based on this,design and build the synchronous control system of the exciting shaft of the four-axis variable trajectory equal-thickness vibrating screen on Lab VIEW,analyze and process the data,and then control signal is transmitted to the controller for multi-axis synchronous control;In the end,the exciting shaft synchronous control system of the four-axis variable trajectory equal-thickness vibrating screen built on Lab VIEW will be connected to the vibrating screen test prototype and then monitor the synchronization between each exciting shaft.Based on this,debug the hardware and software and correct the parameter of the multi-axis synchronous control system,optimize synchronous control effect of the control system and improve the multi-axis synchronous performance of the control system to meet the synchronous requirements of the exciting shafts of the four-axis variable trajectory equal-thickness vibrating screen.There are ninety-six drawings,three tables and eighty-three references in this paper.