A new observer-based chattering-free sliding mode guidance law

Autor:	Abouzar Mohammadi, Vahid Behnamgol, Ahmad Reza Vali
Rok vydání:	2015
Předmět:	Lyapunov function Engineering Variable structure control Line-of-sight business.industry Mechanical Engineering Aerospace Engineering Observer (special relativity) Sliding mode control symbols.namesake Control theory Law symbols Control signal State observer Observer based business
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering. 230:1486-1495
ISSN:	2041-3025 0954-4100
DOI:	10.1177/0954410015612499
Popis:	This paper proposes a new observer-based sliding mode guidance law to intercept maneuvering targets in terminal phase. In order to satisfy the interception, the line of sight angular rate is considered as sliding variable based on parallel navigation idea. For this sliding variable reach to zero in finite time, the guidance law is designed using a new chattering-free observer-based sliding mode control. This algorithm consists of the target acceleration estimation using a new extended state observer. Therefore, with the availability of this estimation, switching function of the sliding mode control is replaced with a smooth function to generate smooth control signal. Also, the stability of closed-loop system is proven by using Lyapunov method. Numerical simulations are presented to illustrate the proposed guidance law potential.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::939e5aff4088f17720e8b95bce0ee2ae https://doi.org/10.1177/0954410015612499 Zobrazit plný text záznamu