Cold-rolling gaugemeter-type AGC based on robust two-degrees-freedom and gain-adaptive Smith-predictor

In view of the changing of a clod-rolling gaugemeter-type automatic gauge control (AGC) model and the gauge feedback resulted from long time-delay under low-speed rolling, a modified method of gaugemetertype AGC for cold-rolling to attenuate the bad influence resulted from uncertainties of the system was proposed. A new gain adaptive algorithm was deduced for an over two-order system with time-delay, and a principle for selecting controller parameters was given to ensure robust stability of the system. Simulation result shows that this method can effectively attenuate disturbance of the system, and stabilize the system when the parameters of the system is changing.