Methods for strain gauge temperature correction

An aircraft comprising:

• a control surface;
• a strain gauge coupled to the control surface;
• a temperature sensor;
• and
• a controller operatively coupled to the strain gauge and the temperature sensor, the controller configured to:
• collect a plurality of measured strain gauge values from the strain gauge;
• collect a plurality of temperature values from the temperature sensor, wherein each temperature value of the plurality of temperature values corresponds to a respective measured strain gauge value of the plurality of measured strain gauge values;
• identify a plurality of measured strain gauge values of interest from the plurality of measured strain gauge values, wherein the plurality of measured strain gauge values of interest corresponds to a plurality of temperature values of interest;
• compare the plurality of measured strain gauge values of interest to a plurality of expected control surface strain values of interest to determine a plurality of strain gauge correction values, wherein the plurality of strain gauge correction values corresponds to the plurality of temperature values of interest;
• correlate the plurality of strain gauge correction values to the plurality of temperature values of interest to determine a correction value-temperature relationship;
• and
• determine a strain value associated with the control surface by applying the correction value-temperature relationship to a real-time strain gauge value and a corresponding real-time temperature.

A non-transitory computer-readable storage medium storing one or more programs, the one or more programs comprising instructions which, when executed by a system, cause the system to:

• collect a plurality of measured strain gauge values from a strain gauge;
• collect a plurality of temperature values wherein each temperature value of the plurality of temperature values corresponds to a respective measured strain gauge value of the plurality of measured strain gauge values;
• identify a plurality of measured strain gauge values of interest from the plurality of measured strain gauge values, wherein the plurality of measured strain gauge values of interest corresponds to a plurality of temperature values of interest;
• compare the plurality of measured strain gauge values of interest to a plurality of expected strain gauge values of interest to determine a plurality of strain gauge correction values, wherein the plurality of strain gauge correction values corresponds to the plurality of temperature values of interest;
• correlate the plurality of strain gauge correction values to the plurality of temperature values of interest to determine a correction value-temperature relationship;
• and
• determine a corrected real-time strain gauge value by applying the correction value—temperature relationship to a real-time strain gauge value and a corresponding real-time temperature.