Robust decoupled sliding mode control for active suspension systems with prescribed tracking performance
Jiawei Peng
Xiaodong Shi
Yinlong Hu
Abstract：In this paper, a robust decoupled sliding mode control (RDSMC) is proposed for active suspension system (ASS) to balance the trade-off between ride comfort and road holding. The ASS is decoupled into two subsystems: a sprung-mass subsystem (regarding ride comfort) and an unsprung-mass subsystem (regarding road holding), which correspond to two prescribed performance tracking problems. Subsequently, an integrated control law is designed by introducing the unsprung-mass sliding surface into the control of the sprung-mass one. To reduce chattering and stabilize the subsystems, a prescribed-time extended disturbance observer (PT-EDO) is designed, achieving the time-varying switching gain RDSMC (TVSG-RDSMC). Numerical simulations imply that the proposed TVSG-RDSMC can effectively improve ride comfort and road holding with a significantly reduced chattering.
Keywords：Active suspension systemSliding mode controlPrescribed tracking performanceDisturbance observer
Publication Date：2025-05-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 310-320 )