New Methodology for Optimal Flight Control using Differential Evolution Algorithms applied on the Cessna Citation X Business Aircraft – Part 2. Validation on Aircraft Research Flight Level D Simulator

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Yamina BOUGHARI ; Georges GHAZI ; Ruxandra Mihaela BOTEZ ; Florian THEEL (2017)
  • Publisher: National Institute for Aerospace Research “Elie Carafoli” - INCAS
  • Journal: INCAS Bulletin (issn: 2066-8201, eissn: 2247-4528)
  • Related identifiers: doi: 10.13111/2066-8201.2017.9.2.4
  • Subject: Optimal Control; Heuristic Algorithm | Differential Evolution | TL1-4050 | Control Augmentation System | Stability Augmentation System | Linear Quadratic Regulator | Flight Control | Proportional Integrator Derivative Tuning | Motor vehicles. Aeronautics. Astronautics
    acm: ComputerApplications_COMPUTERSINOTHERSYSTEMS

In this paper the Cessna Citation X clearance criteria were evaluated for a new Flight Controller. The Flight Control Law were optimized and designed for the Cessna Citation X flight envelope by combining the Deferential Evolution algorithm, the Linear Quadratic Regulator method, and the Proportional Integral controller during a previous research presented in part 1. The optimal controllers were used to reach satisfactory aircraft’s dynamic and safe flight operations with respect to the augmentation systems’ handling qualities, and design requirements. Furthermore the number of controllers used to control the aircraft in its flight envelope was optimized using the Linear Fractional Representations features. To validate the controller over the whole aircraft flight envelope, the linear stability, eigenvalue, and handling qualities criteria in addition of the nonlinear analysis criteria were investigated during this research to assess the business aircraft for flight control clearance and certification. The optimized gains provide a very good stability margins as the eigenvalue analysis shows that the aircraft has a high stability, and a very good flying qualities of the linear aircraft models are ensured in its entire flight envelope, its robustness is demonstrated with respect to uncertainties due to its mass and center of gravity variations.
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