Title
Variable structure control design for uncertain discrete-time systems
Abstract
The main differences between the designs of discrete-time variable structure systems (VSS) and continuous-time VSS are the determination of the switching hyperplane and the satisfaction of the hitting/sliding condition. These differences yield many difficulties in the design of sliding mode control for the discrete-time VSS. This note tries to overcome these difficulties and design a simple sliding mode control for a single input discrete-time VSS such that not only the discrete-time uncertain system is stabilized robustly, but also the chattering along the sliding mode is reduced explicitly. Instead of the conventional switching hyperplane, in the discrete-time case a “switching region”, which includes the hyperplane S0 and its neighborhood, is determined and used. The determination of the switching region is to locate the equilibrium point of the nominal subsystem on each hyperplane Sp outside the switching region such that the state motions inside and outside the switching region will occur alternately until the state of the closed-loop system reaches the origin. Moreover, we prove that the robustness property is retained whenever the uncertainty satisfies a standard matching condition
Year
DOI
Venue
1994
10.1109/9.273342
Automatic Control, IEEE Transactions  
Keywords
DocType
Volume
Control design,Variable structure systems,Sliding mode control,Uncertainty,Uncertain systems,Control systems,Robust stability,Robust control,Robustness,Digital control
Journal
39
Issue
ISSN
Citations 
1
0018-9286
14
PageRank 
References 
Authors
2.23
0
3
Name
Order
Citations
PageRank
Wen-June Wang184481.18
Gin-Hol Wu2142.23
Dah-Ching Yang3142.23