Oscillatory failure detecting method for aircraft i.e. transport aircraft, involves estimating value of parameter of behaviour model of control surface by realizing joint estimation of state illustrated by theoretical position and parameter

摘要

The method involves estimating a theoritical position corresponding to a reference position of control surface in absence of failure by an estimation unit (19). A difference between the position and an effective position of the surface is calculated by a calculation unit (21) to form a residual value. Threshold value, which exceeds the residual value, is counted by comparing the residual and preset threshold values. Value of parameter of a behavior model of the surface is estimated by realizing joint estimation of a state illustrated by the theoretical position and the parameter. An independent claim is also included for an electrical flight control system of an aircraft, comprising a generation unit for generating a control order of a control surface of an aircraft.