Device and method for the residual analysis of a residuum to detect system errors in the system behaviour of a system of an aircraft

摘要

The present invention provides a device and a method for the residual analysis of a residuum to detect system errors in the system behavior of an aircraft. The device for the residual analysis of a residuum comprises an apparatus to generate the residuum at least dependent on the reference variable and the system output variable, a comparator unit to provide an analytical result by comparing the residuum to a given threshold, a first unit to provide a constant threshold portion, a second unit to provide an adaptive threshold portion at least dependent on the reference value, which can change over time, and a third unit to provide the threshold by linking the constant threshold portion to the adaptive threshold portion.

主权项

1. An apparatus for generating a residuum for detecting erroneous transients, drift or oscillations in behavior of a system of an aircraft, the apparatus comprising:
a computer comprising at least one hardware processor configured to execute a plurality of computing functions, wherein:
a first computing function executed by the processor comprises a system model for reproducing a system of an aircraft to be monitored, which system receives a reference variable, an observer feedback variable and a disturbance model variable as inputs, and outputs, as a function thereof, an estimated system output variable;a second computing function executed by the processor forms a residuum from a difference between a monitored system output variable of the system and the estimated system output variable;a third computing function executed by the processor comprises an observer feedback, which receives the residuum as an input, and outputs, as a function thereof, the observer feedback variable for dynamic correction of the system model, in such a way that the estimated system output variable follows the monitored system output variable; anda fourth computing function executed by the processor comprises a disturbance model, which receives the residuum as an input, and outputs, as a function thereof, the disturbance model variable for reproducing effects of external disturbances on the system model, the disturbance model variable being formed as a dynamic disturbance model variable which is formed using a linear combination of a tuning matrix, an integrator and a disturbance variable matrix, the tuning matrix receiving the residuum as an input, and the disturbance variable matrix outputting the disturbance model variable.