Current approaches to in-flight failure accommodation are focused either on failures of sensors or control surface actuators. Some results also focus on simultaneous sensor and actuator failures. However, there are apparently no results for the case of engine actuation failures when the engine dynamics are slow and its output is not measurable. Hence, the stability proofs for the case of accommodation of simultaneous actuator, engine, and sensor gain failures are not available. On the other hand, overall system stability is crucial in preventing loss of control under flight-critical failures. In this paper, a stable adaptive approach to simultaneous sensor, actuator, and slow-engine gain failure accommodation in flight control is proposed. The approach is broken into two parts: 1) design of a stable adaptive reconfigurable control scheme for accommodation of actuator and engine gain failures in the case of slow-engine dynamics and nonmeasurable engine output, and 2) stable adaptive control design extending part 1 results to the case of failures of air-data sensors. In the latter case, a suitable state estimator, referred to as the virtual sensor, is proposed, and the stability of the overall system is demonstrated. Finally, a multiple-model approach is proposed to achieve effective control strategy selection under multiple simultaneous sensor, actuator, and engine gain failures, and overall system stability is demonstrated. Computer simulations of the generic transport model are included to illustrate the proposed approach.


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    Titel :

    Adaptive Flight Control Under Actuation and Sensor Failures and Slow-Engine Dynamics




    Erscheinungsdatum :

    2016




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch



    Klassifikation :

    BKL:    55.54 Flugführung
    Lokalklassifikation TIB:    770/7040





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