Active damping vibration and compensating deflection in the processing-roll system

Deflection and vibration, normally occurring in the processing-roll system, have always been large drawbacks of many industrial processes, especially those related to the textile industry. Hence, this paper introduced a new control dynamic system, including an oil-roll actuator and a proposed controller, to suppress vibration and compensate deflection. The oil-roll actuator applies the control force to the roll by putting the oil inside the roll and directly transferring pressure from the oil to the internal surface of the roll. A new forced-response motion equation obtained by analyzing the dynamic structure of the control system was used to design the Discrete Model Predictive Controller (DMPC). The constrained control was also combined with the proposed controller to obtain optimal control signal and use the effective power of the actuator system. In order to derive a high output response performance and robust stability in the control system, the Laguerre function, one of the discrete orthonormal functions, and the prescribed degree stability were applied to the DMPC. The research results have shown that the response performance is higher and the control system is more stable.