Comprehensive design of disturbance observer and non‐singular terminal sliding mode control for reusable launch vehicles. Issue 12 (1st August 2015)

• Record Type: Journal Article
• Authors: Su, Rui; Zong, Qun; Tian, Bailing; You, Ming
• Is Part Of: IET control theory & applications. Volume 9:Issue 12(2015)
• Page Start: 1821
• Page End: 1830
• Publication Date: 2015-08-01
• Subjects: aerospace control -- observers -- variable structure systems -- multivariable control systems -- control system synthesis -- uncertain systems -- stability -- closed loop systems -- Lyapunov methods; multivariable nonsingular terminal sliding mode control strategy -- NTSMC strategy -- disturbance observer technique -- six‐degree‐of‐freedom reusable launch vehicles -- control‐oriented model -- finite‐time DO design -- model uncertainties -- external disturbances -- composite controller -- attitude tracking errors -- finite time -- stability -- closed‐loop system -- Lyapunov theory -- comprehensive control strategy -- guidance commands -- flight control; Control theory -- Periodicals; Automatic control -- Periodicals; 629.8312
• DOI: 10.1049/iet-cta.2014.0846
• Languages: English
• ISSNs: 1751-8644

Abstract

Abstract : A multivariable non‐singular terminal sliding mode control (NTSMC) strategy is developed combining disturbance observer (DO) technique for the six‐degree‐of‐freedom reusable launch vehicles. First of all, the control‐oriented model is established, followed by a design of finite‐time DO, which is to estimate the model uncertainties and external disturbances. Second, based on the disturbance estimation, a composite controller combining multivariable NTSMC is developed to make the attitude tracking errors converge to zero in finite time. And then the stability of the closed‐loop system is guaranteed through Lyapunov theory. Finally, the simulation results illustrate that the comprehensive control strategy performs well in tracking the guidance commands in spite of model uncertainties and external disturbances.