Three‐dimensional impact angle‐constrained adaptive guidance law considering autopilot lag and input saturation. (25th March 2020)

• Record Type: Journal Article
• Authors: Lin, Defu; Ji, Yi; Wang, Wei; Wang, Yuchen; Wang, Hui; Zhang, Fubiao
• Is Part Of: International journal of robust and nonlinear control. Volume 30:Number 9(2020)
• Page Start: 3653
• Page End: 3671
• Publication Date: 2020-03-25
• Subjects: adaptation -- autopilot lag -- input saturation -- integral Lyapunov algorithm -- three‐dimensional guidance law; Automatic control -- Periodicals; Control theory -- Periodicals; Nonlinear systems -- Periodicals; 629.836
• DOI: 10.1002/rnc.4955
• Languages: English
• ISSNs: 1049-8923

Abstract

Abstract: 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.