Fixed-Time Disturbance Observer-Based Adaptive Finite-Time Guidance Law Design considering Impact Angle Constraint and Autopilot Dynamics | Zendy

Yunjie Wu | Zendy; Fei Ma | Zendy; Xiaofei Yang | Zendy; Siqi Wang | Zendy; Xiaodong Liu | Zendy

Open Access

Fixed-Time Disturbance Observer-Based Adaptive Finite-Time Guidance Law Design considering Impact Angle Constraint and Autopilot Dynamics

Author(s) -

Yunjie Wu,

Fei Ma,

Xiaofei Yang,

Siqi Wang,

Xiaodong Liu

Publication year - 2021

Publication title -

complexity

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.447

H-Index - 61

eISSN - 1099-0526

pISSN - 1076-2787

DOI - 10.1155/2021/8735625

Subject(s) - autopilot , backstepping , control theory (sociology) , missile , computer science , lyapunov stability , convergence (economics) , observer (physics) , constraint (computer aided design) , law , interception , adaptive control , controller (irrigation) , trajectory , lyapunov function , control engineering , mathematics , engineering , control (management) , nonlinear system , artificial intelligence , economic growth , aerospace engineering , biology , geometry , quantum mechanics , political science , agronomy , physics , astronomy , economics , ecology

This paper aims to establish an effective guidance law to accomplish the interception guidance mission for a missile intercepting a target with impact angle constraint and autopilot dynamics. To achieve this purpose, a fixed-time disturbance observer-based adaptive finite-time guidance law is presented. First, a fixed-time disturbance observer (FTDO) is designed to guarantee the fast estimation of the lumped disturbance caused by the target maneuver. Then, the FTDO-based adaptive integral sliding mode backstepping (AISMB) guidance law is constructed for the interception guidance problem. Besides, several adaptive laws are established to estimate the derivative of virtual control inputs, making the “differential explosion problem” of conventional backstepping get avoided. The finite-time convergence characteristic of the closed-loop system is analyzed by utilizing the Lyapunov stability theory. Finally, the simulation examples are conducted to demonstrate the effectiveness of the proposed composite guidance law.

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