Method and system for detecting jamming and/or uncontrolled movement of an aircraft control surface

摘要

A system for detecting jamming and/or uncontrolled movement of an aircraft control surface includes first means for estimating the value of at least one parameter of an equation simulating the feedback loop dynamic of the control surface, according to a recursive autoregressive method with exogenous variable of RARX type in a recursive least squares way, and second means for detecting jamming and/or uncontrolled movement of the control surface, according to the estimated parameter value by the application of a decision test in the parametric space.

主权项

1. A method for detecting at least one of jamming and uncontrolled movement of an aircraft control surface controlled in position by a feedback loop forming part of an electrical flight control system of the aircraft and including:
said control surface, which is movable and of which the position with respect to the aircraft is adjusted by at least one actuator; said actuator which adjusts the position of said control surface, as a function of at least one actuating command received in the form of a feedback command; at least one sensor which measures the effective position of said control surface; and at least one computer which produces a control command for the control surface, which receives said measured effective position and which deduces therefrom an actuating command which is transmitted to said actuator in the form of a feedback current, wherein the method comprises performing, in an automatic and repetitive manner: a) estimating the value of at least one parameter of an equation simulating the feedback loop dynamic of the control surface, according to a recursive autoregressive method with exogenous variable of RARX type in a recursive least squares way; and b) detecting at least one of jamming and uncontrolled movement of said control surface, according at least to the estimated parameter value by the application of a decision test in the parametric space.