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Global Fixed-Time Control for Nonlinear Systems With Unknown Control Coefficients and Dead-Zone Input | IEEE Journals & Magazine | IEEE Xplore

Global Fixed-Time Control for Nonlinear Systems With Unknown Control Coefficients and Dead-Zone Input


Abstract:

The global fixed-time control problem is studied for uncertain nonlinear systems whose dead-zone input and control coefficients are unknown. Unlike the previous results, ...Show More

Abstract:

The global fixed-time control problem is studied for uncertain nonlinear systems whose dead-zone input and control coefficients are unknown. Unlike the previous results, the control coefficients are unknown and their bounds are also not required. Firstly, a modified adaptive controller is proposed with the assistance of the adding a power integrator technique. And a logic switching mechanism is developed based on the framework of the fixed-time stability theorem to compensate the uncertain control coefficients and dead zone. Then it is proved that the fixed-time stability can be ensured for the closed-loop systems based on the proposed algorithm. Furthermore, the effectiveness of the proposed controller is verified by a simulation result.
Published in: IEEE Transactions on Circuits and Systems II: Express Briefs ( Volume: 69, Issue: 2, February 2022)
Page(s): 594 - 598
Date of Publication: 12 July 2021

ISSN Information:

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I. Introduction

As we all know, actuator dead zone is a common phenomenon in engineering applications, such as electric servomotors, piezoelectric translators and mechanical connection. The nonsmooth input nonlinearities always degrade the system performance and even result in instability. Motivated by the practical and theoretical significance, the control problem of nonlinear systems with dead-zone input has attracted much attention in recent years. With the development of baskstepping and adaptive control methods, fruitful results have been obtained for nonlinear systems, see [1]–[4] and references therein.

References

References is not available for this document.