Flutter detection sensor
AssigneeUnited Technologies Corporation
InventorTroy Shannon Prince
Life of this patent
Estimating the term…
Abstract
Systems and methods for monitoring aerostructures are provided. In various embodiments, a method for monitoring an aerostructure may include: receiving a signal from a pressure sensor, the pressure sensor located downstream from the aerostructure; performing a time frequency analysis on the signal to calculate a power level over a range of frequencies; monitoring the power level over the range of frequencies; and determining a susceptibility to a flutter condition based on the monitoring the power level.
Claims19
A method for monitoring fan blades for a gas turbine engine comprising:
- receiving, by a controller, a signal from a pressure sensor, the pressure sensor located downstream from the fan blades;
- performing, by the controller, a time frequency analysis on the signal to calculate a power level over a range of frequencies of the signal;
- monitoring, by the controller, the power level over the range of frequencies;
- determining a shift in the power level from a lower frequency to a higher frequency;
- and
- determining, by the controller, a susceptibility to a flutter condition based on the shift in the power level.
A method for monitoring fan blades for a gas turbine engine, comprising:
- receiving, by a controller, a signal from a pressure sensor, the pressure sensor located downstream from the fan blades;
- calculating, by the controller, a first bandpass signal based on the signal;
- calculating, by the controller, a second bandpass signal based on the signal, the second bandpass signal comprising a higher frequency than the first bandpass signal;
- performing, by the controller, a time frequency analysis on the first bandpass signal and the second bandpass signal to calculate a first power level of the first bandpass signal and a second power level of the second bandpass signal;
- and
- determining, by the controller, a change in at least one of a magnitude of the first power level and a magnitude of the second power level.
A system for monitoring fan blades for a gas turbine engine, comprising:
- a pressure sensor configured to be located downstream from the fan blades;
- a controller in electronic communication with the pressure sensor;
- and
- a tangible, non-transitory memory configured to communicate with the controller, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising:
- receiving, by the controller, a signal from the pressure sensor;
- performing, by the controller, a time frequency analysis on the signal to calculate a power level over a range of frequencies of the signal;
- monitoring, by the controller, the power level over the range of frequencies;
- determining a shift in the power level from a lower frequency to a higher frequency;
- and
- outputting an indicating signal based on the shift in the power level.
Dependencies are inferred from the claim text.