Method for the control of aero gas turbine engines
AssigneeRolls-Royce Deutschland Ltd & Co KG
InventorVolker Stephan
Life of this patent
Estimating the term…
Abstract
The exchange, removal or addition, as applicable, of media and/or power is provided between the individual shafts of an engine, between individual engines and between the engines and the aircraft. Thus, additional degrees of freedom are provided, enabling engine parameters to be addressed in terms of a reduction or avoidance of negative resonances or beats. It also provides an ability to alter thrust from engines of a multi-engined aircraft to reduce rudder trim.
Claims30
A method for the control of at least one engine of an aircraft, comprising:
- identifying an undesirable vibrational noise caused by at least one of:
- a first rotating shaft of the engine operating at a resonant frequency of the aircraft, and the first shaft operating at a speed different than that of a second shaft of the aircraft so as to create standing waves between the two rotating shafts, altering an amount of at least one of energy, fluid and other media that is at least one of supplied to and taken from the engine to alter the speed of the first shaft of the engine by an amount sufficient to reduce the undesirable vibrational noise.
A method for the control of at least one engine of an aircraft, wherein an amount of at least one of energy, fluid and other media that is at least one of supplied to and taken from the engine, is altered to alter the speed of at least one shaft of the engine, wherein the speed of the at least one shaft of the engine is altered with respect to at least a second shaft of the engine.
A method for the control of at least one engine of an aircraft, comprising:
- identifying an undesirable vibrational noise caused by the engine operating so as to emit an excitation frequency near a resonant frequency of the aircraft, altering an amount of at least one of energy, fluid and other media that is at least one of supplied to and taken from the engine to alter an excitation frequency of the engine by an amount sufficient to reduce the undesirable vibrational noise.
A method for the control of at least one engine of an aircraft, wherein an amount of at least one of energy, fluid and other media that is at least one of supplied to and taken from the engine, is altered to alter an excitation frequency of the engine, wherein the excitation frequency of the engine is altered with respect to at least a second engine.
A method for the control of at least two engines of an aircraft, wherein each engine is constructed and arranged to supply a portion of a desired amount of at least one of electrical energy, bleed air and hydraulic fluid for use by the aircraft, wherein an amount of the at least one of electrical energy, bleed air and hydraulic fluid supplied by a first of the engines is altered with respect to an amount of the at least one of electrical energy, bleed air and hydraulic fluid supplied by at least a second of the engines to alter the speed of at least one shaft of the first engine with respect to at least one shaft of the second engine to reduce vibration of the aircraft.
Dependencies are inferred from the claim text.