Positioning control system of computerized flat knitter base on fuzzy PID composite feedforward control

This paper analyzes the principle of handpiece in computerized flat knitter, designs a new shogging system which is driven by servo positioning control basic on the adaptive fuzzy PID composite feedforward control algorithm. This system combines with Micro Control Unit (MCU), adopts the servo system to regulate the shogging value, and adjusts the locating error with the fuzzy composite feedforward control algorithm, finally realizes the high accuracy control of shogging location. The results of MATLAB simulation show that: comparing with common PID control, this algorithm has faster dynamic respond and higher positioning accuracy.