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In this brief, we introduce the passivity theory into the fault tolerance analysis for switched systems. We propose a ldquoglobal passivityrdquo concept which means that the total energy stored by the switched system is less than the total energy supplied from the outside. The individual passivity of each mode is not required, and the stability of the system can be achieved via the global energy dissipativity in the presence of faults. We further provide a ldquoperiodic fault tolerant passivityrdquo to check the fault tolerance easily. The obtained results are extended to feedback interconnected systems. A switched RLC circuit example is taken to illustrate the efficiency of the proposed results.
Circuits and Systems II: Express Briefs, IEEE Transactions on (Volume:55 , Issue: 12 )
Date of Publication: Dec. 2008