Title

An Energy-Based Nonlinear Pressure Observer For Electronically Controlled Pneumatic Brake Fault Diagnosis

Keywords

ECP brake; Fault diagnosis; GLR; Nonlinear system; Pressure observer

Abstract

As widely used in the heavy-haul combined trains, electronically controlled pneumatic(ECP) brake is a highly nonlinear system. Heavy-haul combined train consists of variant freight trucks with different types and different load weights. When operating with brake mode, inconsistent braking forces will aggravate impacts of collisions between adjacent freight cars, especially uncertainty faults occur and the trucks in rigid connection mode. Therefore, it is necessary to conduct online fault diagnosis for ECP brakes. In this paper, an Lyapunov-based globally stable pressure observer for ECP brake is proposed. Firstly, according to the output value of the observer, a residual generator is designed and residual signals are evaluated with the Generalized Likelihood Ratio(GLR) method. Secondly, fault diagnosis can be achieved by GLR when system's faults happened. Finally, experimental results demonstrate and validate effectiveness of the proposed observer and algorithm.

Publication Date

7-12-2017

Publication Title

Proceedings of the 29th Chinese Control and Decision Conference, CCDC 2017

Number of Pages

3005-3010

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/CCDC.2017.7979024

Socpus ID

85028089090 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85028089090

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