Patents by Inventor Karl-Erik ?rzën

Karl-Erik ?rzën has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and a system for evaluating whether a signal is suitable for feed-forward control
    Patent number: 6937910
    Abstract: A method for evaluating whether a measurable disturbance on a process controlled by a feedback controller is suitable for feed-forward control. The disturbance is measured. The controller output signal due to the disturbance is measured. A first reference signal corresponding to the controller output signal is measured when responding to disturbance entering before the process. A second reference signal corresponding to the controller output signal is generated when responding to a disturbance entering after the process. It is estimated where in the process the disturbance enters by comparing the measured controller output signal due to the disturbance with the reference signals. It is evaluated whether the disturbance is suitable for feed-forward control depending on where in the process the disturbance enters.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: August 30, 2005
    Assignee: ABB AB
    Inventors: Mikael Petersson, Tore Hägglund, Karl-Erik Årzën