System Design And Method Research For Four Motors Synchronous Control System On The Stage

It was well-known that Beijing 2008 Olympic Games was held successfully. The efficient operation of the stage control system ensured the brilliant performances. In the Opening and Closing Ceremony, there are such features of the performance as large-scale, more properties, complex action, strict time limit. So it appealed the higher performance about the design and application of the stage equipment control system. The main content of this thesis is designing the Control System for the Stage Equipment and researching on the method of Multi-Motor Synchronous Control for the Four Motors Lift Platform.Firstly, beginning from demands of the stage performance and the functional structure of Distributed Control System(DCS), the Control System for the Four Motors Lift Platform is designed as a whole. The reliability is enhanced through the redundancy design of equipment and network.Secondly, the realization of data transport comes true in the Control System of the Four Motors Lift Platform. Aiming at the functional demands of different equipments, the communications of PLC S7-400 with the other equipments are completed by using two types of data transport based on PROFIBUS-DP and Ethernet.Finally, this thesis researches on the Cross-Coupled Synchronous Control for the Four Motors Lift Platform. There are two types of structure for the Cross-Coupled Synchronous Control: Master-Slave and Equal Status. Based on the single motor control system, the model of the Equal Status control system is constructed and its stability is analyzed. Then based on the practical equipment parameters, the Track Controller and the Synchronous Compensative Controller are designed according to the engineering design method beginning with the anti-jamming performance. The stability of the biaxial system is analyzed quantitatively. The Startup and Synchronous performance on two synchronous control structures is contrastively analyzed in the biaxial and four-axial systems. And it is concluded that the Equal Status Synchronous Control structure is morn appropriate to the Four Motors Lift Platform.