The Synchronous Control Technology Of Dual Motor Driving Based On DCC Programming

With the rapid development of industry, the requirements of heavy CNC machine tools and products quality have improved gradually. The urgent need for high-speed, high-precision heavy CNC machine tools to process high quality products. Due to the large cross beam in the large gantry CNC machine tools, using the single motor drive will produce asymmetrical driving force, resulting in the deflection of the cross beam, affect the accuracy of processing. The use of double motor drive can not only solve the problem caused by the single motor drive, but also generate greater driving force. But the double motor drive will have the problem of whether the two motor shaft is synchronization or not, if the position synchronization error between the two axis is too large, also in conjunction with the single motor drive result in column gantry deflection and deformation. This thesis using the DCC programming methods to reduce the two position synchronization error, to study how to reduce synchronization errors has very important practical significance and application value.In this thesis first describes the overall program design of dual-motor synchronous control servo system. It uses two servo motors combined to drive the load and achieve a synchronous movement of dual-motor. And then realized the dual-motor synchronous control by DCC programing in a new generation of Siemens Inverter called S120. By optimizing the parameter of position loop, speed loop, current loop and setting the filter to achieve the ideal system dynamics. And it compares the position synchronization error between three control modes, serial control, parallel control, and cross coupling control. It can get the conclusion that the synchronization accuracy of the cross coupling control is higher. At last, in order to meet the requirement of low position synchronization error, establishes a dynamic model of dual-motor synchronous drive servo system and simulation by MATLAB software. Verify that the superiority of dual-motor drive than the single motor drive.