Steel pipe's fixed-length cutting control system based on fuzzy self-adaptive PID

SHENG Qiang
（Faculty of Mechanism and Electronics， Huzhou Vocational & Technical College， Huzhou 313000，China）

Abstract：Aiming at the weak points of traditional steel pipe's fixed-length cutting control method on flying-saw machine，a control strategy based on the fuzzy self-adaptive PID method was proposed. The inputs required by the control model are fixed-length cutting error and the error change rate，and the model gives the correct additional setpoint for the three parameters of PID control individually. Thus the on-line automatic adjustment of the PID parameters was achieved. The fuzzy self-adaptive PID control was compared with traditional PID by simulation through Matlab. The results indicate that the steel pipe's fixed-length cutting dynamic control performs much better by using the fuzzy self-adaptive PID control strategy.
Key words： flying-saw machine；fixed-length cutting；fuzzy self-adaptive PID control；Matlab