Signal Interpretation for Monitoring and Diagnosis: A Cooling System Testbed

Manders, Eric ; Biswas, Gautam ; Mosterman, Pieter ; Barford, Lee ; Ram, Vishnu ; Barnett, Joel

HP Development Company

关键词: signal processing;    qualitative reasoning;    diagnosis;    derivative;    signal interpretation;    signal classification;   

RP-ID  :  HPL-1999-36

学科分类：计算机科学（综合）

美国|英语

来源: HP Labs

【 摘 要 】

We present our framework for monitoring and diagnosis. The framework is based on interaction between a qualitative diagnosis engine and a monitoring component that performs a signal to symbol transformation on the signals. We have applied the methodology to a real system, the cooling system of an automobile engine on which we have installed thermocouples and pressure sensors. Faults can be introduced into the cooling system in a controlled manner. We show that a combination of linear approximation techniques and statistical signal processing can provide robust symbolic signal values for the diagnosis algorithms. 6 Pages