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Three‐dimensional impact angle‐constrained adaptive guidance law considering autopilot lag and input saturation
Author(s) -
Lin Defu,
Ji Yi,
Wang Wei,
Wang Yuchen,
Wang Hui,
Zhang Fubiao
Publication year - 2020
Publication title -
international journal of robust and nonlinear control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.361
H-Index - 106
eISSN - 1099-1239
pISSN - 1049-8923
DOI - 10.1002/rnc.4955
Subject(s) - autopilot , control theory (sociology) , backstepping , saturation (graph theory) , lag , lyapunov stability , computer science , adaptive control , controller (irrigation) , law , engineering , control engineering , mathematics , control (management) , artificial intelligence , computer network , agronomy , combinatorics , biology , political science
This work investigates three‐dimensional accurate guidance problem in the presence of impact angle constraint, input saturation, autopilot lag, and external disturbance, and presents a robust adaptive guidance method for maneuvering targets. More specifically, based on integral Lyapunov control algorithm, a robust guidance law, which can drive both terminal line‐of‐sight angle error and its rate to a small region around zero, while resisting the terrible influence caused by external disturbance, is proposed in this work. To deal with input saturation, guidance command is separated into two parts: real input and saturation error, and an adaptive control technique is employed to compensate the influence resulting from external disturbance and saturation error. Moreover, regarding autopilot lag as a first‐order dynamics, a backstepping designed controller with an adaptive term is proposed. Numerical simulations are carried out and their results demonstrate the proposed properties.