Profile control method and system therefor
AssigneeYokogawa Electric Corporation
InventorsTakashi Sasaki, Akimichi Noyori, Akihiro Yamamoto
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Abstract
A profile control method for controlling a profile in the width direction of a sheet by using a plurality of actuators, includes calculating an envelope profile connecting local peaks of the profile; and calculating a manipulated value of each actuator with the objective of optimizing 2σ of the profile and the envelope profile.
Claims4
A system of controlling a profile of thickness in the width direction of a sheet by using a plurality of actuators, comprising:
- a profile controller using a profile of thickness measured in the width direction of the sheet to calculate an envelope profile connecting local peaks of the profile of thickness, thereby calculating a manipulated value of each actuator with the objective of optimizing 2σ of the profile of thickness and the envelope profile,
- wherein the profile controller calculates the manipulated value by applying a steepest descent method relating to an evaluation of optimizing 2σ of the profile of thickness and the envelope profile.
A profile control method for controlling a profile of thickness in the width direction of a sheet by using a plurality of actuators, comprising:
- calculating local peaks of the profile of thickness, based on thickness data of the sheet obtained by a thickness gauge, the calculation of the local peaks being performed by an actuator controller that controls the plurality of actuators,
- calculating, by the actuator controller, an envelope profile connecting local peaks of the profile of thickness;
- and
- calculating, by the actuator controller, a manipulated value of each actuator with the objective of optimizing 2σ of the profile and the envelope profile,
- wherein the manipulated value is calculated by the actuator controller which applies a steepest descent method relating to an evaluation function of optimizing 2σ of the profile of thickness and the envelope profile.
Dependencies are inferred from the claim text.