Global output feedback control for uncertain nonlinear feedforward systems

ABSTRACT

This paper considers a class of uncertain nonlinear feedforward systems with unknown constant growth rate, output polynomial function growth rate and system input function growth rate. Under the most general growth rate condition, only one dynamic gain is used to compensate simultaneously these three types of growth rates, an output feedback controller is constructed to guarantee the boundedness of closed-loop system states and the convergence of original system states.

KEYWORDS:

• Nonlinear feedforward systems
• output feedback
• constant growth rate
• output polynomial function growth rate
• system input function growth rate

Acknowledgments

We gratefully acknowledge the constructive remarks of the Associate Editor and the referees which have greately improved the manuscript.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the Taishan Scholar Project of Shandong Province of China [grant number ts201712040]; National Natural Science Foundation of China [grant number 61673242]; Shandong Provincial Natural Science Foundation of China [grant number ZR2016FM10].