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

  • US 9,535,419 B2
  • Filed: 10/27/2011
  • Issued: 01/03/2017
  • Est. Priority Date: 04/28/2009
  • Status: Expired due to Fees
First Claim
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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; and

    a 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.

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