抄録
Since the first Thermal Expansion type actuator (Thermatrol) was installed in domestic market in 1981. CD Weight Profile Control has been extremely growing in addition to Motor Drive and CP (Consistency Profiling) actuators. However, there seems to be some cases which can't keep the maximum control performance after the installation because of the change of control parameters, difference between the inlet position and QCS measurement position and the shrinkage pattern problem for the difference of machine conditions and some modifications.
This report introduces the basic concept, control algorithms and a support tool to get parameters for CD Weight Profile Control to help with keeping and developing the existing control performance. Also a completely new concept of Spectra Foil Sensor to get a control profile instantly at Wet-End will be introduced. This sensor with High-Speed CD control will be expected to meet the customer demand to accomplish the High-Speed paper machine in near future.
