Abstract: A computer-based system and method for production planning are described that relies on developing factory shop floor modeling. This modeling includes simulating the factory shop floor to create a Virtual Factory. This Virtual Factory provides the ability to assess any possible production sequence for determining an optimal of production sequence according to the criteria defined the user.
Abstract: A valve positioner system that includes one or more unique control methods and devices, including several routines to facilitate the continuous maintenance, calibration and adjustment requirements of the valve. The positioner system may utilize pressure and position feedback signals to monitor the valve. The positioner system may utilize an external controller for various diagnostic and other routines. The positioner system can provide automatic positioning and can operate in a manual operating mode or an automatic operating mode. The positioner system can diagnose the valve while the valve process is running or during a maintenance operation. The positioner system can provide nonlinear control of the valve position. The positioner system can self-tune and self-characterize the valve to assure uniform position control. The positioner system can provide valve control through pressure feedback when a position feedback fails or other diagnosed problems.
Type:
Grant
Filed:
April 10, 2001
Date of Patent:
June 1, 2004
Assignee:
Dresser, Inc.
Inventors:
Henry Boger, Christopher Colwell, Peter Levesque, Larry Schoonover, Raymond Villier, Denis Vital, Chunhe Zhou, James Stares