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<p>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.</p>

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Robust decoupled sliding mode control for active suspension systems with prescribed tracking performance

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • Jiawei Peng,
  • Xiaodong Shi,
  • Yinlong Hu

摘要

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.