Study on Temperature Control Strategy for Film Blowing Machine

Focusing on the direct influence of temperature of the film blowing machine on plastic film quality, an identification-free adaptive control strategy with expert amendment is proposed to solve the problem that it is hard to be controlled due to large time delay, nonlinearity, time variation and difficulty in establishing mathematical model of plastic melting process. In this control strategy, according to the past and current process information, the process output and trend can be estimated based on expert rules to amend the output of the identification-free adaptive control. The simulation result shows that this control strategy has good robustness and perfect temperature control for heating process.