A discrete-time multivariable MRAC scheme applied to a nonlinear aircraft model with structural damage. (March 2015)

• Record Type: Journal Article
• Authors: Guo, Jiaxing; Tao, Gang
• Is Part Of: Automatica. Volume 53(2015)
• Page Start: 43
• Page End: 52
• Publication Date: 2015-03
• Subjects: Adaptive control -- Aircraft systems -- Discretization -- Discrete-time systems -- Fault-tolerant control -- Infinite zero structure -- Nonlinear systems -- Structural damage; Automatic control -- Periodicals; Automation -- Periodicals; 629.805
• DOI: 10.1016/j.automatica.2014.12.036
• Languages: English
• ISSNs: 0005-1098

Abstract

Abstract: In this paper, a new discrete-time multivariable model reference adaptive control (MRAC) scheme is developed and its application to continuous-time nonlinear systems with structural damage is studied, for which several key technical issues are addressed. The relation of the infinite zero structures of the continuous-time nonlinear system and the linearized discrete-time system is established. Invariance properties of the system infinite zero structure and control gain matrix of the linearized discrete-time system under damage are studied for an aircraft flight control application. Desired system stability and asymptotic output tracking are ensured for the linearized discrete-time system with dynamics and damage uncertainties. A discrete-time linearization-based control design is constructed for control of a high-fidelity continuous-time nonlinear aircraft model with uncertain dynamics and structural damage. Simulation results show the desired system performance and demonstrate the effectiveness of the developed discrete-time adaptive control method for the nonlinear aircraft system model. ∇