Apparatus and method for modeling and control of cross-direction fiber orientation processes

A method comprising:

• applying actuator edge padding to a process model;
• generating a controller model for a controller that is to control a fiber orientation (FO) process, the controller model associated with cross-directional fiber orientation of a web, the controller model generated using the process model based on spatial frequency characteristics of the FO process identified in a spatial long wavelength test of the FO process;
• controlling, by the controller, the FO process based on the controller model;
• and
• dynamically adjusting at least one model parameter of the controller model during operation of the controller.

An apparatus comprising:

• a process controller configured to control a fiber orientation (FO) process, the process controller comprising:
• at least one memory configured to store a controller model, the controller model associated with cross-directional fiber orientation of a web, the controller model generated using a process model based on spatial frequency characteristics of the FO process identified in a spatial long wavelength test of the FO process, wherein the spatial frequency characteristics of the FO process are further identified in a spatial impulse test of the FO process, and wherein the process model is based on:
• high spatial frequency characteristics of the FO process associated with results of the spatial impulse test;
• and
• low spatial frequency characteristics of the FO process associated with results of the spatial long wavelength test;
• and
• at least one processing device configured to:
• control the FO process based on the controller model;
• and
• dynamically adjust at least one model parameter of the controller model during operation of the process controller.

A non-transitory computer readable medium embodying a computer program, the computer program comprising computer readable program code for:

• obtaining a controller model for a controller that is to control a fiber orientation (FO) process, the controller model associated with cross-directional fiber orientation of a web, the controller model generated using a process model based on spatial frequency characteristics of the FO process identified in a spatial long wavelength test of the FO process, wherein the spatial frequency characteristics of the FO process are further identified in a spatial impulse test of the FO process, and wherein the process model is based on:
• high spatial frequency characteristics of the FO process associated with results of the spatial impulse test;
• and
• low spatial frequency characteristics of the FO process associated with results of the spatial long wavelength test;
• and
• dynamically adjusting at least one model parameter of the controller model during operation of the controller.

An apparatus comprising:

• a process controller configured to control a fiber orientation (FO) process and apply actuator edge padding to a process model;
• the process controller comprising:
• at least one memory configured to store a controller model, the controller model associated with cross-directional fiber orientation of a web, the controller model generated using the process model based on spatial frequency characteristics of the FO process identified in a spatial long wavelength test of the FO process;
• and
• at least one processing device configured to:
• control the FO process based on the controller model;
• and
• dynamically adjust at least one model parameter of the controller model during operation of the process controller.

A non-transitory computer readable medium embodying a computer program, the computer program comprising computer readable program code for:

• applying actuator edge padding to a process model;
• obtaining a controller model for a controller that is to control a fiber orientation (FO) process, the controller model associated with cross-directional fiber orientation of a web, the controller model generated using the process model based on spatial frequency characteristics of the FO process identified in a spatial long wavelength test of the FO process;
• and
• dynamically adjusting at least one model parameter of the controller model during operation of the controller.