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Analysis and minimization of L2-sensitivity for linear systems and two-dimensional state-space filters using general controllability and observability Gramians

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5 Author(s)
Hinamoto, T. ; Graduate Sch. of Eng., Hiroshima Univ., Japan ; Yokoyama, S. ; Inoue, T. ; Zeng, W.
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A novel expression for the evaluation of L2-sensitivity is developed for the cases of linear discrete-time systems, linear continuous-time systems, and two-dimensional (2-D) state-space digital filters. This is accomplished by introducing the concept of general controllability and observability Gramians in each case. Moreover, the L2-sensitivity measures obtained here contain the conventional L1/L2-sensitivity measures as a special case. An iterative procedure for constructing the optimal coordinate transformation matrix that minimizes the L2-sensitivity measure is then presented in each case. This procedure is advantageous since the initial estimate and the estimate at each iteration can be calculated analytically. Finally, three numerical examples are given to illustrate the utility of the proposed techniques.

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Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on  (Volume:49 ,  Issue: 9 )