This paper presents an improved backstepping control scheme with the adaptive estimation for nonlinear missile systems. First, the inherent nonlinearities and large uncertainties caused by high angle of attack are approximated by a higher-order polynomial with unknown time-varying coefficients, which is easily estimated by using adaptive parameter estimation technique. Then the prescribed performance function is employed to strictly guarantee the transient and steady-state estimation performance. Furthermore, to deal with virtual control variables’ derivatives of the backstepping control algorithm, a sigmoid function is used in the design of the tracking differentiator for increasing the convergence rate and reducing the tracking error. Finally, three examples with comparative numerical simulations are respectively conducted to verify the performance of time-varying parameter estimation, dynamic transient response, and tracking accuracy of the proposed control strategy.


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    Title :

    Improved Backstepping Control with Adaptive Estimation for Nonlinear Missile Systems


    Contributors:
    Gui, Hang (author) / Sun, Ruisheng (author) / Lu, Qingli (author) / Zhou, Guofeng (author)

    Published in:

    Publication date :

    2022-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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