This study explores the effectiveness of applying optimal control techniques to the flight control law clearance problem, which is the challenge of ensuring the safety of an aircraft’s flight control system for all allowable inputs. The specific criterion chosen was the angle-of-attack limit exceeding criterion, and two different cost functions were constructed that accurately describe it. Using Aero-Data Model in a Research Environment to obtain realistic aerodynamic coefficients, a longitudinal short-period model was developed. It was proven that the general system has a bang-bang worst-case input when the states are unbounded, and a possible bang-singular-bang worst-case input when one or more states are bounded. These results were validated with simulations using General Pseudospectral Optimal Control Software. In the physical domain these results translate into actuator rate limiting issues; thus, limited elevator deflection and rate of elevator deflection can lead to even more extreme worst-case performance. Experimenting with approximations of these input signals in the full model demonstrated that they achieve high maximum angle-of-attack outputs even in a complex system. Furthermore, it was confirmed that bang-singular-bang inputs in a realistic system, on average, attain a higher maximum angle of attack than bang-bang inputs.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Flight Control Law Clearance Using Optimal Control Theory


    Beteiligte:

    Erschienen in:

    Journal of Aircraft ; 53 , 2 ; 515-529


    Erscheinungsdatum :

    01.03.2016




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Flight Control Law Clearance using Optimal Control Theory

    Herrmann, Avriel / Ben-Asher, Joseph Z. | British Library Conference Proceedings | 2015


    Flight Control Law Clearance Using Optimal Control Theory

    Herrmann, Avriel A | Online Contents | 2016


    Optimal Control Based Clearance of Flight Control Laws

    Diepolder, Johannes Wolfgang Maximilian | TIBKAT | 2021

    Freier Zugriff

    Continuous Integration of Optimal Control Based Flight Control Law Clearance

    Braun, David / Schwaiger, Florian / Holzapfel, Florian et al. | TIBKAT | 2022


    Continuous Integration of Optimal Control Based Flight Control Law Clearance

    Braun, David / Schwaiger, Florian / Holzapfel, Florian et al. | AIAA | 2022