Inversion-Based Approach for Detection and Isolation of Faults in Switched Linear Systems

Electronics

RuiEsteves Araújo¹  AlexandreMiguel Silveira² 

[1] INESC TEC and Faculty of Engineering, University of Porto, 4200-465 Porto, Portugal;Superior Institute of Engineering of Porto, Polytechnic Institute of Porto, 4249-015 Porto, Portugal;

关键词: inversion problems;    fault diagnosis;    DC-DC converters;   

DOI  :  10.3390/electronics9040561

来源: DOAJ

【 摘 要 】

This paper addresses the problem of the left inversion of switched linear systems from a diagnostics perspective. The problem of left inversion is to reconstruct the input of a system with the knowledge of its output, whose differentiation is usually required. In the case of this work, the objective is to reconstruct the system’s unknown inputs, based on the knowledge of its outputs, switching sequence and known inputs. With the inverse model of the switched linear system, a real-time Fault Detection and Isolation (FDI) algorithm with an integrated Fuzzy Logic System (FLS) that is capable of detecting and isolating abrupt faults occurring in the system is developed. In order to attenuate the effects of unknown disturbances and noise at the output of the inverse model, a smoothing strategy is also used. The results are illustrated with an example. The performance of the method is validated experimentally in a dc-dc boost converter, using a low-cost microcontroller, without any additional components.

【 授权许可】

Unknown