GLOBAL AIRFRAME HEALTH CHARACTERIZATION

摘要

According to one aspect, a controller, including a processor, sets an initial vibration frequency to be applied to an airframe. The controller commands one or more force generators to apply a vibratory load to the airframe at the initial vibration frequency. The controller determines a vibration response of the airframe at the initial vibration frequency using sensors. The controller sweeps through a range of vibration frequencies to be applied to the airframe. The one or more force generators are commanded to apply a plurality of vibratory loads to the airframe over the range of vibration frequencies. The controller determines a range of vibration responses of the airframe over the range of vibration frequencies using the sensors. A global stiffness of the airframe is determined based on the vibration response and the range of vibration responses. The controller reports results of the determined global stiffness of the airframe.

主权项

1. A method comprising:
setting, by a controller comprising a processor, an initial vibration frequency to be applied to an airframe; commanding, by the controller, one or more force generators to apply a vibratory load to the airframe at the initial vibration frequency; determining, by the controller, a vibration response of the airframe at the initial vibration frequency using a plurality of sensors; sweeping, by the controller, through a range of vibration frequencies to be applied to the airframe; commanding, by the controller, the one or more force generators to apply a plurality of vibratory loads to the airframe over the range of vibration frequencies; determining, by the controller, a range of vibration responses of the airframe over the range of vibration frequencies using the plurality of sensors; determining, by the controller, a global stiffness of the airframe based on the vibration response and the range of vibration responses; and reporting, by the controller, results of determining the global stiffness of the airframe.