Multivariant set point using N1 and N2 for engine control
AssigneeHoneywell International Inc.
InventorsGregory J. Chapman, John J. Rushinsky
Life of this patent
Estimating the term…
Abstract
A method for selecting a setpoint for a turbofan engine having a fan speed and a core idle speed scheduling includes determining a weighting factor based upon a throttle lever position, the weighting factor being zero in an idle region and ranging from zero to one in a dead band region and applying the weighting factor to an output of a fan speed governor and to an output of a core speed governor to select the setpoint.
Claims15
A method for selecting a setpoint for a turbofan engine having a fan speed and a core idle speed scheduling comprising:
- determining a weighting factor based upon a throttle lever position;
- and
- applying the weighting factor to an output of a fan speed governor and to an output of a core speed governor to select the setpoint.
A method for selecting a setpoint for a turbofan engine having a fan speed and a core idle speed scheduling comprising:
- determining a weighting factor based upon a throttle lever position, the weighting factor being zero in an idle region and ranging from zero to one in a dead band region;
- and
- applying the weighting factor to an output of a fan speed governor and to an output of a core speed governor to select the setpoint.
A method for selecting an acceleration rate for a turbofan engine having a fan speed and a core idle speed scheduling comprising:
- determining a weighting factor based upon a throttle lever position, the weighting factor being zero in an idle region and ranging from zero to one in a dead band region;
- and
- multiplying the weighting factor to an output of a fan speed governor to generate a weighted fan speed acceleration rate;
- multiplying one minus the weighting factor to an output of a core speed governor to generate a weighted core speed acceleration rate;
- and
- summing the weighted fan speed acceleration rate with the core speed acceleration rate to select the acceleration rate.
A system for selecting a setpoint for a turbofan engine having a fan speed and a core idle speed scheduling comprising:
- a throttle lever;
- a fan speed governor;
- a core speed governor;
- and
- a control unit operable to determine a weighting factor based upon a throttle lever position and to apply the weighting factor to an output of a fan speed governor and to an output of a core speed governor to select the setpoint.
Dependencies are inferred from the claim text.