Sequential Relay Autotuning Method for the Temperature Control of Multizone Heated Rollers

Sequential Relay Autotuning Method for the Temperature Control of Multizone Heated Rollers

This heated rollers are used to give tactility and gloss to papers, fabrics, non-woven fabrics, films and so on. The surface temperature of the heated roller and its uniformity are especially important. Existing heated rollers have surface temperature profiles up to 10oC deviations, causing listing in fabrics. In order to suppress the surface temperature deviation, a heated roller system having multizone electric heaters and heating oil within the steel roller is proposed. The temperature control of the heated roller is a multivariable system with interactions. To identify the heated roller dynamics and design a control system systematically, a recent sequential relay autotuning method is applied. Experimental results are given.

This heated rollers are used to give tactility and gloss to papers, fabrics, non-woven fabrics, films and so on. The surface temperature of the heated roller and its uniformity are especially important. Existing heated rollers have surface temperature profiles up to 10oC deviations, causing listing in fabrics. In order to suppress the surface temperature deviation, a heated roller system having multizone electric heaters and heating oil within the steel roller is proposed. The temperature control of the heated roller is a multivariable system with interactions. To identify the heated roller dynamics and design a control system systematically, a recent sequential relay autotuning method is applied. Experimental results are given.