This paper is devoted to measuring the continuous diagnosis capability of a system. A key metric and its calculation models are proposed enabling us to measure the continuous diagnosis capability of a system directly without establishing and searching the sequential fault tree (SFT) of the system. At first a description of a D matrix is given and its metric is defined to determine the weakness of a continuous diagnosis. Then based on the definition of a sequential fault combination, a sequential fault tree (SFT) is defined with its establishment process summarized. A key SFT metric is established to measure the continuous diagnosis capability of a system. Two basic types of dependency graphical models (DGMs) and one combination type of DGM are selected for characteristics analysis and establishment of metric calculation models. Finally, both the SFT searching method and direct calculation method are applied to two designs of one type of an auxiliary navigation equipment, which shows the high efficiency of the direct calculation method.

JO - Metrology and Measurement Systems L1 - http://rhis.czasopisma.pan.pl/Content/89961/PDF/Journal10178-VolumeXIXIssue3_08.pdf L2 - http://rhis.czasopisma.pan.pl/Content/89961 IS - No 3 EP - 520 KW - fault diagnosis KW - dependency matrix KW - measurement. ER - A1 - Jun-You Shi A1 - Lin, Xie-Gui A1 - Meng Shi PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation JF - Metrology and Measurement Systems SP - 509 T1 - A key metric and its calculation models for a continuous diagnosis capability base dependency matrix UR - http://rhis.czasopisma.pan.pl/dlibra/docmetadata?id=89961 DOI - 10.2478/v10178-012-0044-5