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Differentiator-Based Incremental Three-Dimensional Terminal Angle Guidance With Enhanced Robustness.

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Bibliographic Details
Title: Differentiator-Based Incremental Three-Dimensional Terminal Angle Guidance With Enhanced Robustness.
Authors: Han, Tuo1 (AUTHOR), Shin, Hyo-Sang2 (AUTHOR) h.shin@cranfield.ac.uk, Hu, Qinglei3 (AUTHOR), Tsourdos, Antonios2 (AUTHOR), Xin, Ming4 (AUTHOR)
Source: IEEE Transactions on Aerospace & Electronic Systems. Oct2022, Vol. 58 Issue 5, p4020-4032. 13p.
Subjects: Sliding mode control, Angles, Nonlinear dynamical systems
Abstract: In this article, an incremental guidancelaw with terminal angle constraint is proposed against maneuvering targets in the 3-D space. First, a sliding surface is constructed such that its first-order dynamics excludes the relative range and line-of-sight angles in the perturbation. This manipulation avoids unboundedperturbations induced by target maneuvers near collision. Then, a benchmark guidance law is derived via the nonlinear dynamic inversion (NDI) based sliding mode control (NDI-SMC). To further enhance guidance system robustness, an incremental nonlinear dynamic inversion (INDI) based SMC (INDI-SMC) 3-D guidance law is developed. The INDI-SMC guidance law exploits the first-order derivative of the sliding variable and guidance command output at the latest step, which leads to reduced perturbation and thus requires smaller gains than the NDI-SMC guidance law. A multivariable continuous differentiator is employed to estimate the sliding variable's first-order derivative for guidance law implementation. Moreover, the stability of the differentiator is analyzed and the guidance robustness under uncertainties is compared. Extensive numerical simulations and a Monte Carlo test are conducted to verify effectiveness and robustness of the proposed method. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:In this article, an incremental guidancelaw with terminal angle constraint is proposed against maneuvering targets in the 3-D space. First, a sliding surface is constructed such that its first-order dynamics excludes the relative range and line-of-sight angles in the perturbation. This manipulation avoids unboundedperturbations induced by target maneuvers near collision. Then, a benchmark guidance law is derived via the nonlinear dynamic inversion (NDI) based sliding mode control (NDI-SMC). To further enhance guidance system robustness, an incremental nonlinear dynamic inversion (INDI) based SMC (INDI-SMC) 3-D guidance law is developed. The INDI-SMC guidance law exploits the first-order derivative of the sliding variable and guidance command output at the latest step, which leads to reduced perturbation and thus requires smaller gains than the NDI-SMC guidance law. A multivariable continuous differentiator is employed to estimate the sliding variable's first-order derivative for guidance law implementation. Moreover, the stability of the differentiator is analyzed and the guidance robustness under uncertainties is compared. Extensive numerical simulations and a Monte Carlo test are conducted to verify effectiveness and robustness of the proposed method. [ABSTRACT FROM AUTHOR]
ISSN:00189251
DOI:10.1109/TAES.2022.3158639