System for controlling a turbine
AssigneeSignal Power Group Operating LLC
InventorsDavid Keith Crowe, Elden W. Crom
Life of this patent
Estimating the term…
Abstract
A system for controlling a turbine is disclosed. The system includes a turbine control fuel governor that has a plurality of VCPIDs operating in parallel with one another. Each VCPID is associated with a respective turbine parameter and one or more external parameters. Each VCPID incorporates feedback from the parallel operating VCPIDs to feed an integral term of a current VCPID in the following manner: a previous derivative gain and a previous proportional gain are summed and subtracted from a selected output for the turbine to yield a result, and the result is input to an integral gain portion of the current VCPID.
Claims19
A system for controlling an engine, comprising:
- a closed loop engine control fuel governor comprising a plurality of VCPID (Variable Coefficient Proportional Integrative Derivative) control loops operating in parallel with one another to regulate fuel flow to the engine, each VCPID control loop being associated with a respective engine parameter and one or more external parameters,
- an external transducer comprising a sensor for sensing an external parameter of the one or more external parameters,
- wherein each VCPID control loop incorporates feedback from the parallel operating VCPID control loops to feed an integral term of a current VCPID control loop in the following manner:
- (i) a previous derivative gain and a previous proportional gain are summed and subtracted from a selected output for the engine to yield a first result term, and
- (ii) the first result term is input to an integral gain portion of the current VCPID control loop,
- wherein each VCPID control loop includes a VCPID output that is fed to a first function,
- wherein the first function selects a fuel command based on the VCPID output, the fuel command being a command that requires a first amount of fuel to the parallel VCPID control loops, and
- wherein the closed loop engine control fuel governor provides the first amount of fuel to the engine to regulate the fuel flow to the engine to maintain the external parameter sensed by the sensor within a target range.
A method of controlling an engine, comprising:
- operating a closed loop engine control fuel governor comprising a plurality of VCPID (Variable Coefficient Proportional Integrative Derivative) control loops operating in parallel with one another to regulate fuel flow to the engine, each VCPID control loop being associated with a respective engine parameter and one or more external parameters;
- sensing, by an external transducer comprising a sensor, an external parameter of the one or more external parameters;
- incorporating, by each VCPID control loop, feedback from the parallel operating VCPID control loops to feed an integral term of a current VCPID control loop in the following manner:
- (i) a previous derivative gain and a previous proportional gain are summed and subtracted from a selected output for the engine to yield a first result term, and
- (ii) the first result term is input to an integral gain portion of the current VCPID control loop;
- feeding, by each VCPID control loop, a VCPID output that is fed to a first function;
- selecting, by the first function, a fuel command based on the VCPID output, the fuel command being a command that requires a first amount of fuel to the parallel VCPID control loops;
- and
- providing, by the closed loop engine control fuel governor, the first amount of fuel to the engine to regulate the fuel flow to the engine to maintain the external parameter sensed by the sensor within a target range.
Dependencies are inferred from the claim text.