1
Jagannathan Sarangapani, Sri K Rangarajan: Method and apparatus for determining the severity of a trend toward an impending machine failure and responding to the same. Caterpillar, Blackwell Sanders Peper Martin, August 27, 2002: US06442511 (52 worldwide citation)

A method and apparatus for determining severity of a trend toward an impending machine failure under actual operating conditions. The method and apparatus includes providing a typical failure trend based on a set of normal operating conditions for the machine, determining a slope value for the typic ...


2
Sri K Rangarajan, Jagannathan Sarangapani: Method and apparatus for predicting a fault condition using non-linear curve fitting techniques. Caterpillar, Blackwell Sanders Peper Martin, March 26, 2002: US06363332 (30 worldwide citation)

An apparatus for predicting a fault condition for a machine is disclosed. The machine has a plurality of parameters being dependent upon machine performance. A sensor is connected to the machine and is adapted to produce an electrical signal in response to one of the plurality of machine parameters. ...


3
Douglas A Carlson, Todd D Creger, Wayne M Ferrell, Javad Hosseini, Kenneth P Liesener, Sri K Rangarajan: Method and apparatus for determining torque at desired locations on a machine. Caterpillar, Steve D Lundquist, June 29, 2004: US06757604 (5 worldwide citation)

A method and apparatus for determining a value of torque at a desired location on a machine. The method and apparatus includes choosing the desired location, determining an operating condition relevant to the desired location, determining a plurality of parameters of the machine, and determining a v ...


4
Douglas A Carlson, Todd D Creger, Wayne M Ferrell, Javad Hosseini, Kenneth P Liesener, Sri K Rangarajan: Method and apparatus for determining torque at desired locations on a machine. Caterpillar, May 15, 2003: US20030093205-A1

A method and apparatus for determining a value of torque at a desired location on a machine. The method and apparatus includes choosing the desired location, determining an operating condition relevant to the desired location, determining a plurality of parameters of the machine, and determining a v ...