Patents by Inventor Mark G Challener

Mark G Challener 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).

  • Engine performance model
    Patent number: 8117017
    Abstract: A method of constructing a piecewise linear engine performance model, comprises the steps of: (a) providing a non-linear engine performance model which iteratively calculates engine performance variables y from a plurality of sub-models, each sub-model representing the performance of a component of the engine; (b) defining a plurality of engine power conditions, each engine power condition being defined by one or more engine state variables x; (c) for each of the engine power conditions, using the non-linear engine performance model to determine partial derivatives ?y of the engine performance variables y with respect to engine control variables u and with respect to the engine state variables x, the values of the partial derivatives ?y being determined so that, on integrating the partial derivatives ?y, the error between steady state values for the engine performance variables y calculated by the non-linear engine performance model and steady state values for the engine performance variables y calculated
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: February 14, 2012
    Assignee: Rolls-Royce PLC
    Inventors: Sean P Ellis, Mark G Challener
  • Engine performance model
    Publication number: 20090012762
    Abstract: A method of constructing a piecewise linear engine performance model, comprises the steps of: (a) providing a non-linear engine performance model which iteratively calculates engine performance variables y from a plurality of sub-models, each sub-model representing the performance of a component of the engine; (b) defining a plurality of engine power conditions, each engine power condition being defined by one or more engine state variables x; (c) for each of the engine power conditions, using the non-linear engine performance model to determine partial derivatives ?y of the engine performance variables y with respect to engine control variables u and with respect to the engine state variables x, the values of the partial derivatives ?y being determined so that, on integrating the partial derivatives ?y, the error between steady state values for the engine performance variables y calculated by the non-linear engine performance model and steady state values for the engine performance variables y calculated
    Type: Application
    Filed: April 3, 2008
    Publication date: January 8, 2009
    Applicant: ROLLS-ROYCE PLC
    Inventors: Sean Patrick Ellis, Mark G. Challener