华东交通大学学报2026，Vol.43Issue(4)：85-96,12.
基于改进滑模观测器的高速列车牵引整流器传感器故障容错控制
An Improved Sliding Mode Observer Based Fault-Tolerant Control Scheme for High-Speed Train Traction Rectifiers with Sensor Faults
摘要
Abstract
To mitigate the impact of sudden sensor faults in traction rectifiers during high-speed train operation,this paper proposes a sensor fault-tolerant control method based on an improved sliding mode observer,which achieves rapid sensor fault diagnosis and fault-tolerant control.Firstly,the topological structure of a two-level traction rectifier is analyzed to establish its mathematical model with unknown disturbances.Subsequently,a novel sensor fault diagnosis strategy employing an adaptive sliding mode observer is developed.The sliding mode observer is designed using linear matrix inequality(LMI)methods,and the sliding mode robust term gain is adjusted online via adaptive laws to obtain voltage and current estimation signals.Residual signals are construct-ed by comparing these estimated signals with sensor-sampled data,enabling online fault diagnosis through thresh-old comparison.Furthermore,a voltage outer-loop sliding mode fault-tolerant controller is designed by introducing a novel sliding mode exponential reaching law,complemented by a current inner-loop fault-tolerant controller to en-hance system robustness.Finally,a high-power traction rectifier model was constructed on the Simulink platform for simulation verification in this study.The simulation results demonstrate that the proposed fault-tolerant method can diagnose sensor faults within 0.020 s and implement compensation within 0.050 s,with observer state estima-tion error maintained below 1％.The voltage outer-loop fault-tolerant controller achieves a reduced settling time of 0.035 s under load transient conditions.The proposed methodology effectively enhances system dynamic response performance and operational reliability,providing valuable insights for safety-critical control of high-speed trains.关键词
高速列车牵引整流器/自适应滑模观测器/故障诊断/容错控制Key words
traction rectifier for high-speed trains/adaptive sliding mode observer/fault diagnosis/fault-tolerant control分类
交通工程引用本文复制引用
谭畅,李煜刚,冷江涛,汤明睿..基于改进滑模观测器的高速列车牵引整流器传感器故障容错控制[J].华东交通大学学报,2026,43(4):85-96,12.基金项目
国家自然科学基金项目(62003138) （62003138）
江西省自然科学基金项目(20242BAB25087) （20242BAB25087）
江西省2023年度研究生创新专项资金项目(YC2023-S512) （YC2023-S512）
