Stability of DSP-based constant tension control systems and data acquisition

A DSP-based control technique to constant tension control for the rewinding roll of a paper machine is presented. The proposed methodology makes use of a digital signal processing technique to investigate the stability of a multi-closed-loop control system and then partition its operating area into optimal working regions. A novel data acquisition method is introduced to obtain speed and tension fast responses. This technique has the characteristics of high reliability and flexibility in industrial applications.