Load-based quadratic compensator gain adjustment
First Claim
1. A method, comprising:
- driving an electric power generator with an internal combustion engine to provide AC electric power at a frequency within a selected range;
regulating operation of the engine with a control to maintain the frequency of the electric power within the selected range during variation in engine load, which includes;
providing an input signal to the control, the input signal being representative of a change in speed of the engine in response to the variation in engine load;
determining one or more gain factors of the control as a function of a control signal representative of the engine load; and
adjusting fuel provided to the engine in response to the control as a function of the input signal and the one or more gain factors of the control.
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Accused Products
Abstract
One embodiment includes an internal combustion engine, a sensor signal representative of an observed engine speed, and a controller. This controller is responsive to the sensor signal to determine a control input representative of a difference between the observed engine speed and a desired engine speed. The controller defines a compensator that is one or more of a proportional-integral type, a proportional-derivative type, and a proportional-integral-derivative type. The controller determines at least one gain factor of the compensator with a signal corresponding to engine load. The compensator is responsive to the control input to generate an output signal to adjust engine fueling as a function of the control input and the gain factor.
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Citations
20 Claims
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1. A method, comprising:
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driving an electric power generator with an internal combustion engine to provide AC electric power at a frequency within a selected range; regulating operation of the engine with a control to maintain the frequency of the electric power within the selected range during variation in engine load, which includes; providing an input signal to the control, the input signal being representative of a change in speed of the engine in response to the variation in engine load; determining one or more gain factors of the control as a function of a control signal representative of the engine load; and adjusting fuel provided to the engine in response to the control as a function of the input signal and the one or more gain factors of the control. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method, comprising:
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providing an internal combustion engine with one or more of a proportional-integral control, a proportional-derivative control, and a proportional-integral-derivative control; generating an input control signal representative of a difference between a sensed engine speed and a desired engine speed; determining one or more gain factors for the one or more of the proportional-integral control, the proportional-derivative control, and the proportional-integral-derivative control as a function of an engine fueling signal; and controlling engine fueling in response to an output signal determined as a function of the one or more gain factors and the input control signal with the one or more of the proportional-integral control, the proportional-derivative control, and the proportional-integral-derivative control. - View Dependent Claims (8, 9, 10, 11)
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12. A system, comprising:
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an internal combustion engine; an electric power generator mechanically coupled to the engine, the engine being operable to drive the generator to provide AC electric power at a frequency within a selected range; a sensor operable to generate a sensor signal representative of an observed engine speed; a controller including a compensator, the controller being responsive to the sensor signal to determine a compensator input signal representative of a difference between the observed engine speed and a desired engine speed, the controller being operable to determine one or more gain factors of the compensator with a control signal representative of engine load, the compensator being responsive to the compensator input signal to generate an output signal as a function of the compensator input signal and the one or more gain factors; and a fueling device responsive to the output signal to provide fuel to the engine. - View Dependent Claims (13, 14, 15)
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16. A system, comprising:
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an internal combustion engine; a sensor operable to generate a sensor signal representative of an observed engine speed; a controller responsive to the sensor signal to determine a control input representative of a difference between the observed engine speed and a desired engine speed, the controller defining a control that is one or more of a proportional-integral type, a proportional-derivative type, and a proportional-integral-derivative type, the controller being operable to determine one or more gain factors of the control with a controller signal corresponding to engine load, the control being responsive to the control input to generate an output signal as a function of the control input and the one or more gain factors; and a fueling device responsive to the output signal to provide fuel to the engine. - View Dependent Claims (17, 18, 19, 20)
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Specification