ZOH Discretization Effect on Higher-Order Sliding-Mode Control Systems

Author

Wang, Bin ; Yu, Xinghuo ; Li, Xiangjun

Author_Institution

Sch. of Electr. & Comput. Eng., RMIT Univ., Melbourne, VIC

Volume

55

Issue

11

fYear

2008

Firstpage

4055

Lastpage

4064

Abstract

In this paper, the zeroth-order-hold (ZOH) discretization of higher-order sliding-mode control (SMC) systems is studied. The equivalent control-based SMC systems with a relative degree higher than one are first formulated into a canonical form which is easy for control design. Theoretical results for the ZOH-discretized SMC systems with a relative degree higher than one are given, including estimates of the bounds of steady states and higher-order sliding-mode functions, as well as periodic properties of the trajectories. Simulation results of a vehicle suspension system are presented to show the effectiveness of the analysis and theoretical results.

Keywords

control system synthesis; mechanical variables control; suspensions (mechanical components); variable structure systems; vehicles; control design; discretization effect; sliding-mode control systems; sliding-mode functions; steady states; vehicle suspension system; zeroth-order-hold discretization; Convergence; discretization; relative degree; sliding-mode control; stability;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2008.2005139

Filename

4633621