A method for determining a steady state operating condition of a machine includes determining whether a current machine speed of the machine is within a defined range of operation, determining whether a step change in output power of the machine has occurred, determining a first duration of time elapsed...http://www.google.es/patents/US7525443?utm_source=gb-gplus-sharePatente US7525443 - Method and apparatus for machine state quantification in machinery management systems
Method and apparatus for machine state quantification in machinery ...
