Tension PID hybrid control system and control method for coiled material production line

The invention provides a tension PID hybrid control system and control method for a coiled material production line. The system comprises a PID processing module, a frequency control module and a speed limiting module. The speed limiting module is used for inputting a highest speed limiting signal to the PID processing module. The PID processing module is used for determining a speed adjusting signal according to a tension deviation signal and the highest speed limiting signal and outputting the speed adjusting signal to the frequency control module. The tension deviation signal is a deviationformed between a given tension input signal input into the system and an actual tension signal fed back by a controlled object. The frequency control module is used for outputting a speed control signal to the controlled object according to the speed adjustment signal after receiving the speed adjustment signal sent by the PID processing module so as to control the running speed of the controlledobject. The vibration of