In this paper, an impact-angle-constrained nonsingular fast terminal sliding mode control (NFTSMC) based guidance law with fixed-time disturbance observer (FxTDO) is proposed in the presence of uncertain disturbances. Without the requirement of the upper bound of the disturbance and its derivative, a bi-limit weighted fixed-time disturbance observer is used to estimate the unknown lumped disturbance. In order to attenuate the chattering and ensure convergence within finite time, a nonsingular terminal sliding mode guidance method is adopted with the disturbance estimation. Numerical simulation results with some comparisons demonstrate the effectiveness of the proposed method.


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    Title :

    Fixed-Time Disturbance Observer Based Nonsingular Fast Terminal Sliding Mode Guidance with Impact Angle Constraint


    Contributors:
    Wu, Rong (author) / Guan, Yingzi (author) / Wei, Changzhu (author) / Cui, Naigang (author)


    Publication date :

    2018-08-01


    Size :

    683750 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English