Title :
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
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;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2008.2005139
