Variable frequency automatic tensioning system based on fuzzy control

The invention relates to the technical field of belt conveyors, and particularly relates to a variable frequency automatic tensioning system based on fuzzy control. The variable frequency automatic tensioning system comprises a PLC controller, a frequency converter and a sensor; the PLC controller is used for running a fuzzy control program; the frequency converter drives a tension electromotor torotate under a given signal of the PLC controller, and the tensioning electromotor drives a tensioning winch to operate; the sensor comprises a temperature sensor, a pressure sensor, a first shaft encoder, a second shaft encoder and a tension sensor. The excessive modulation is well suppressed, the good dynamic features and static features are achieved, the relatively strong adaptive capacity isachieved for the variation of the structural parameter of a controlled object, the requirement of the automatic tensioning winch on the control system is accorded; and meanwhile, the tensioning electromotor is controlled via t