A Second-Order Sliding Mode Observer for Fault Detection and Isolation of Turbocharged SI Engines

作者：Salehi Rasoul^*; Vossoughi Gholamreza; Alasty Aria

来源：IEEE Transactions on Industrial Electronics, 2015, 62(12): 7786-7794.

DOI：10.1109/TIE.2015.2448693

• Fault detection and isolation (FDI)
• second-order sliding-mode observer (SOSMO)
• turbocharged spark-ignition (SI) engine
• wastegate (WG)

This paper proposes a novel method for detection and isolation of wastegate (WG) faults in a turbocharged (TC) gasoline engine. This paper starts with a fault effect analysis on the WG faults, including WG stuck open and stuck closed, which is an early step in a detection strategy design. Then, a second-order sliding-mode observer (SOSMO) is proposed to capture the exhaust manifold dynamics. The observer uses experimentally validated engine models to estimate the WG position and a virtual force. The virtual force represents the external disturbances that disrupt the WG operation and enables the proposed SOSMO to estimate the WG position robust to the faults. Using this force, a detection and isolation algorithm is presented and experimentally verified on a modern TC gasoline engine. Test bench results show that the proposed strategy can successfully detect and isolate the two different WG faults.

• 出版日期2015-12