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US 12,499,864 B2Granted
Active sound attenuation for aircraft electrical system
AssigneePratt & Whitney Canada Corp.
InventorsXi Wang, Jeremy Gonzalez
Life of this patent
Estimating the term…
Abstract
A method is provided for operating an aircraft system. During this method, an electric machine of an electrical system is operated onboard an aircraft. A first set of electrical system waves produced by the electrical system is sensed. A set of electrical system attenuation waves is produced to attenuate a second set of electrical system waves produced by the electrical system in response to sensing the first set of the electrical system waves.
Claims18
A method for operating an aircraft system, comprising:
- operating an electric machine of an electrical system onboard an aircraft, the aircraft including a powerplant comprising the electric machine, a transmission system, and a thermal engine, the electric machine and the thermal engine configured in parallel to drive a propulsor rotor through the transmission system;
- sensing a first set of electrical system waves produced by electrical circuitry for operating the electric machine;
- producing a set of electrical system attenuation waves to attenuate a second set of electrical system waves produced by the electrical circuitry for operating the electric machine in response to sensing the first set of the electrical system waves;
- and
- selectively operating a sound attenuation system based on one or more flight parameters;
- wherein the first set of electrical system waves are sensed by the sound attenuation system, and the set of electrical system attenuation waves are produced by the sound attenuation system;
- and
- wherein the one or more flight parameters comprising a power setting of the electric machine.
5 more elements
A system for an aircraft, comprising:
- an airframe;
- a powerplant mounted with the airframe, the powerplant comprising an electric machine, a transmission system, and a thermal engine, and the electric machine and the thermal engine configured in series to drive a propulsor rotor through the transmission system;
- an electrical system comprising the electric machine, the electric machine sized to draw at least one megawatt of electrical power from a power source;
- and
- a noise attenuation system configured to
- sense a first set of electrical system sound waves produced by the electrical system, the first set of electrical system sound waves comprising field sound waves produced by generation of an electromagnetic field and circuitry sound waves produced by electrical circuitry of the electrical system;
- and
- produce a set of electrical system attenuation waves to attenuate a second set of electrical system sound waves produced by the electrical system in response to sensing the first set of the electrical system sound waves and based on a power setting of the electric machine, the second set of electrical system sound waves comprising the field sound waves and the circuitry sound waves.
5 more elements
A system for an aircraft, comprising:
- an airframe;
- a propulsion system arranged with the airframe, the propulsion system comprising a geartrain, a thermal engine, an electric machine and a bladed propulsor rotor, the electric machine rotatably coupled to a first component of the geartrain, the thermal engine rotatably coupled to a second component of the geartrain, and the bladed propulsor rotor rotatably coupled to a third component of the geartrain;
- and
- a noise attenuation system configured to
- sense a first set of sound waves produced by the propulsion system, the first set of sound waves comprising field sound waves produced by generation of an electromagnetic field;
- and
- produce a set of attenuation waves and direct the set of attenuation waves in a downward direction away from the airframe to attenuate a second set of sound waves produced by the propulsion system outside and below the airframe in response to sensing the first set of the sound waves, the second set of sound waves comprising the field sound waves;
- wherein the noise attenuation system is selectively operated based on one or more flight parameters, the one or more flight parameters comprising a power setting of the electric machine.
5 more elements
Dependencies are inferred from the claim text.