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Design and simulation of a non-linear, discontinuous, flight control system using rate actuated inverse dynamics

Brindley, Joseph and Counsell, John and Zaher, Obadah Samir and Pearce, John G (2013) Design and simulation of a non-linear, discontinuous, flight control system using rate actuated inverse dynamics. Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 227 (4). pp. 632-646. ISSN 0954-4100

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    Abstract

    This paper presents the novel nonlinear controller design method of Rate Actuated Inverse Dynamics (RAID). The RAID controller design uses a novel Variable Structure Control (VSC) based anti-windup method to ensure that the actuator does not become overdriven when rate or deflection limits are reached. This allows the actuator to remain on both rate and deflection limits without the system becoming unstable. This is demonstrated in a non-linear simulation of a missile body rate autopilot using a multivariable controller designed using RAID methods and, for comparison, a controller designed using Robust Inverse Dynamics Estimation (RIDE). The simulation is performed with an advanced solver which uses a discontinuity detection mechanism to ensure that errors do not occur during the simulation due to the presence of multiple discontinuities. The results show that using a smaller actuator, with reduced rate limits, is not possible with the RIDE design. Conversely, the RAID design demonstrates excellent performance, despite the actuator limiting in both deflection and rate of deflection. This illustrates the possibility of using smaller, less powerful actuators without sacrificing system stability.

    Item type: Article
    ID code: 39289
    Keywords: rate actuated inverse dynamics, non-linear control, flight control, variable structure control, robust inverse dynamics estimation, design and simulation, discontinuous, flight control system, Mechanical engineering and machinery, Motor vehicles. Aeronautics. Astronautics, Mechanical Engineering, Aerospace Engineering
    Subjects: Technology > Mechanical engineering and machinery
    Technology > Motor vehicles. Aeronautics. Astronautics
    Department: Faculty of Engineering > Mechanical and Aerospace Engineering
    Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 23 Apr 2012 09:44
    Last modified: 27 Mar 2014 10:04
    URI: http://strathprints.strath.ac.uk/id/eprint/39289

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