A method and apparatus for controlling a fluid flow valve with a linear control loop such that the error signal utilized to actuate a variable rate controller for moving a valve control element or for controlling another valve control parameter is the same for a given control parameter change regardless...http://www.google.fr/patents/US5304093?utm_source=gb-gplus-shareBrevet US5304093 - Method and apparatus for controlling a fluid flow valve
Method and apparatus for controlling a fluid flow valve
