Dryer control and grade change system for a paper machine

摘要: A computer system for controlling a paper sheet drying machine characterized in that feed-forward signal is developed proportional to desired steam temperature the drums from consideration of empirical relationship between caliper and production rate. This same rate used predict at new while maintaining constant. By this means, grade change transfer path can be computed which avoids need conditions. The speed changed merely function mechanical response completely divorced much longer thermal responses. After established, varied leisurely over period time increase