|Output Feedback Passification for Switched Discrete-time Nonlinear Systems and Adaptive Control System Design
Hongbo Pang*, Shengnan Tan, and Shuo Liu
International Journal of Control, Automation, and Systems, vol. 20, no. 6, pp.1914-1925, 2022
Abstract : This paper concerns output feedback passification and adaptive output feedback stabilization problems of switched discrete-time nonlinear systems. First, passivity concept is proposed to describe the overall passivity of switched discrete-time nonlinear system without requiring the passivity of active subsystems. Then, the conditions to be passive for such system are provided. Second, the output feedback passification is achieved under a given switching signal, when switched zero dynamics system is passive. Furthermore, adaptive output feedback stabilization problem is solved by using the output feedback passification method. Third, a time-dependent switching signal is designed to guarantee switched zero dynamics system passive. Finally, two examples are presented to verify the effectiveness of the proposed methods.
Adaptive stabilization, feedback passivity, switched discrete-time systems, time-dependent switching law.