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US 12,110,121 B2Granted
Systems and methods for defining APU steady state speed according to the aircraft operational conditions
AssigneeYaborã IndúStria AeronáUtica S.A.
InventorsMaurício Rodrigues Lima, João Miguel Ferreira Cunha
Life of this patent
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Abstract
A method for defining the steady state speed of an auxiliary power unit (APU) of an aircraft according to the aircraft operating condition.
Claims15
In an aircraft comprising a constant speed auxiliary power unit having a rated speed, a control method performing operations including the following with at least one processor:
- determining an aircraft operational mode, wherein the determined aircraft operational mode indicates at least an aircraft ground operation mode, an aircraft flight operation mode and an aircraft main engine start operation mode;
- selecting a constant steady state speed setpoint of the auxiliary power unit that corresponds to the determined aircraft operational mode, wherein the selected constant steady state speed setpoint of the auxiliary power unit is fixed for the determined aircraft operational mode and is not impacted by factors other than the determined aircraft operational mode, thereby adapting the selected constant steady state speed setpoint of the auxiliary power unit to the determined aircraft operational mode;
- and
- controlling the auxiliary power unit to operate at the selected constant steady state speed setpoint.
1 more element
An aircraft comprising:
- an auxiliary power unit, and
- at least one processor operatively coupled to the auxiliary power unit, the at least one processor being configured to perform operations including the following:
- determining an aircraft operational mode, wherein the determined aircraft operational mode indicates at least an aircraft ground operation mode, an aircraft flight operation mode and an aircraft main engine start operation mode;
- selecting a constant steady state speed setpoint of the auxiliary power unit that corresponds to the determined aircraft operational condition mode, wherein the selected constant steady state speed setpoint of the auxiliary power unit is fixed for the determined aircraft operational mode and is not impacted by factors other than the determined aircraft operational mode, thereby adapting the selected constant steady state speed of the auxiliary power unit to the determined aircraft operational mode;
- and
- B controlling the auxiliary power unit to operate at the selected constant steady state speed setpoint.
3 more elements
Dependencies are inferred from the claim text.