Patent ID: 6047275
Filing Date: 2000-04-04
Classification: B65H,G05B

Abstract:
An apparatus for use with a roller system including a spindle for rolling material thereon, a motor for driving the spindle and a motor controller, the controller including a regulator, an inertia compensator and first and second summers, the controller providing a material tension error signal, the regulator receiving the error signal and generating a regulator output signal as a function of at least one regulator variable, the first summer adding the error and output signals to provide a torque command signal, the inertia compensator using compensation signals to generate a torque correction signal, the second summer adding the command torque and torque correction signals to provide a modified torque signal for motor control, the controller also providing a plurality of tuning signals including a tension reference signal, an acceleration signal, a roll diameter signal and a tension feedback signal, the regulator output also being a tuning signal, the apparatus for providing compensation signals and regulator variables such that a reference material tension is maintained, the apparatus comprising:a fuzzy logic analyzer including at least one set of fuzzy membership functions at least one set of fuzzy rules, the analyzer applying the fuzzy functions and rules to at least a subset of the tuning signals to produce the at least one regulator variable and at least one compensation signal, the compensation signal provided to the compensator.