Patents Assigned to Hightech Network AB
  • Method and an apparatus for automatically tuning a process regulator
    Patent number: 4758943
    Abstract: Method for adjusting the setting of a digital process regulator on the basis of the result obtained from a simple relay feedback experiment. When an adjustment of the regulator setting is to be made, the relay feedback is connected in the control feedback circuit instead of the regulator in order to cause self-oscillation. The self-oscillation signal is utilized to calculate the new setting of the regulator.
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: July 19, 1988
    Assignee: Hightech Network AB
    Inventors: Karl J. Astrom, Tore Hagglund