Synchronization and tension control of dual motor systems via MIMO discrete pseudo model following integral variable structure control

In industrial manufacturing systems, the one or the more client motors are often arranged to follow the velocity of the master motor. The speed difference between these motors will effect the tension of the product. Hence, the synchronized control and the tension control are the important research topics in the manufacturing process. This paper proposes a novel modified multi-input-multi-output discrete pseudo model following integral variable structure control ( MIMO DPMFIVSC) for the synchronism and tension control of dual motor system. By Grey model theory, the unknown model of tension control can be on-line established to be a pseudo grey model. A real time reference model is also transferred by the grey theory to accumulated model. The discrete integral variable structure control rule is used to eliminate the error between the pseudo and accumulated models. This object will achieve the model following work. Finally, a prototype of the dual motor system is developed for testing the performance of the proposed control scheme. Experimental results will show the robust potential and the practicability of the proposed controller. (c) 2008 Elsevier Ltd. All rights reserved.