Patent ID: 8868284
Filing Date: 2014-10-21
Classification: G05B,G06Q,G07C

Abstract:
1. A computer-implemented method for virtual monitoring of aircraft fleet loads comprising: periodically determining, by a health and usage monitoring system (HUMS) on an aircraft, a set of coefficients as a function of parametric data and high frequency data associated with the aircraft, wherein the aircraft is a rotorcraft with a main rotor, and the high-frequency data are sampled more than once per revolution of the main rotor, the parametric data comprises low-frequency aircraft state parameters sampled once per revolution of the main rotor; calculating, by the HUMS, virtual load data associated with the aircraft from a set of orthogonal waveforms by selectively combining the set of coefficients and the set of orthogonal waveforms to produce the virtual load data by multiplying a subset of the set of orthogonal waveforms with a corresponding subset of coefficients from the set of coefficients to produce weighted waveforms, and summing the weighted waveforms, the virtual load data comprising estimated structural loads on components of the aircraft while in operation, wherein the set of coefficients comprises fewer data values than the virtual load data; storing, by the HUMS, the set of coefficients on the aircraft; and transmitting the set of coefficients from the aircraft to a ground-based system configured to reproduce the virtual load data based on a copy of the set of orthogonal waveforms and the received set of coefficients.