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Error bounds in the averaging of hybrid systems

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2 Author(s)
Ezzine, J. ; Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA ; Haddad, A.H.

The authors analyze the error introduced by the averaging of hybrid systems. These systems involve linear systems which can take a number of different realizations based on the state of an underlying finite state process. The averaging technique (based on a formula from Lie algebras known as the Backer-Campbell-Hausdorff (BCH) formula) provides a single system matrix as an approximation to the hybrid system. The two errors discussed are: (1) the error induced by the truncation of the BCH series expansion and (2) the error between the actual hybrid system and its average. A simple sufficient stability test is proposed to check the asymptotic behavior of this error. In addition, conditions are derived that allow the use of state feedback instead of averaging to arrive at a time-invariant system matrix

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Automatic Control, IEEE Transactions on  (Volume:34 ,  Issue: 11 )