Study On The Synchronous System Of Multi-motor Based On DSP And FPGA

In modern industrial processes, applications of multi-motor can be finedin everywhere especially in the printing, metallurgy, paper making, textile, buildingmaterials. In order to ensure production efficiency and product quality, coordination mustbe maintained between every motor. With the development of power electronics, microelectronics, computer technology, sensor technology, rare earth permanentmagnet materials and the development of motor control theory, from the mechanicalspindle control to the electronic axis control, from analog to digital control systems, thetraditional PID control to artificial intelligence, technology of multi-motorsynchronous control has made considerable progress. Therefore, it is very importantto study multi-motor synchronous control in-depth and improve the control accuracy.Aim at synchronous motor control for multi-motor, in the background ofmulti-color web press, this paper analysis of the advantages and disadvantages ofmechanical spindle control, non-cross-coupling control, cross-coupling control, andmake the following research:(1) Design the hardware platform based on FPGA + DSP cross-coupling control andintroduces the synchronization algorithm of average error.(2) The hardware of motion controller using the dedicated DSP chip ---TMS320F2812 to realize algorithm, use one TMS320F2812 chip to control twopermanent magnet synchronous motor, make full use of hardware resources, save costs.(3) In order to achieve high efficiency control, using XC95144XL to realize logiccontrol and share DSP chip assignments.(4) On the software side, this paper design method of cross-coupling control basedon average error. The average error is introduced as synchronization error, makesystem act quickly while reduce the oscillation, and the system using the PID algorithm toeliminate steady-state error, so as to achieve high-precision synchronization.Experimental results show that, the multi-motor synchronous system based on theDSP + FPGA hardware platform with the average error of the fuzzy PID control algorithm, not only in hardware costs have a greater advantage, and in the case that complexity ofthe algorithm is not high have preferable synchronization effect.