Title :
Guidance law accounting for second-order dynamics of missile autopilot and impact angle constraints
Author :
Liang Wu ; Weihong Wang ; Shaofeng Xiong
Author_Institution :
Sch. of Autom. Sci. & Electr. Eng., Beihang Univ., Beijing, China
fDate :
May 31 2014-June 2 2014
Abstract :
In this paper, a planar guidance law accounting for second-order dynamics of missile autopilot and impact angle constraints is designed using backstepping method and nonsingular terminal sliding mode control (NTSM). Nonsingular terminal sliding mode was employed to drive the line of sight (LOS) angle to a desired impact angle in finite time without singularity. In backstepping design, some first-order low-pass filters are introduced to avoid the occurrence of high-order derivatives of LOS angular rate in the expression of guidance law. Using the Lyapunov stability theorem, it is proved that all signals in the closed loop system are ultimately bounded. Simulations of intercepting constant-acceleration maneuvering targets and targets with sinusoidal acceleration show that the guidance law still ensures the impact angle constraints and is able to compensate the autopilot lag.
Keywords :
Lyapunov methods; acceleration control; autonomous aerial vehicles; closed loop systems; control system synthesis; low-pass filters; military aircraft; missile guidance; variable structure systems; LOS angle; LOS angular rate; Lyapunov stability theorem; NTSM; autopilot lag; backstepping design; backstepping method; closed loop system signals; finite time; first-order low-pass filters; impact angle constraints; intercepting constant-acceleration maneuvering targets; line of sight angle; missile autopilot; nonsingular terminal sliding mode control; planar guidance law; second-order dynamics; sinusoidal acceleration targets; Acceleration; Backstepping; Equations; Mathematical model; Missiles; Sliding mode control; Three-dimensional displays; Backstepping method; Guidance Law; Impact Angle Constraints; Nonsingular Terminal Sliding Mode; Second-order Dynamics;
Conference_Titel :
Control and Decision Conference (2014 CCDC), The 26th Chinese
Conference_Location :
Changsha
Print_ISBN :
978-1-4799-3707-3
DOI :
10.1109/CCDC.2014.6852586