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Upper and lower bounds of the frequency response gain of sampled-data systems

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3 Author(s)
Hagiwara, T. ; Dept. of Electr. Eng., Kyoto Univ., Japan ; Suyama, M. ; Araki, M.

This paper is concerned with the computation of the frequency response gain of sampled-data systems. The exact computation is intrinsically quite burdensome even at a fixed frequency due to the infinite-dimensional nature involved in this problem. To facilitate an approximate computation instead, this paper gives three independent methods to compute upper and lower bounds of the frequency response gain. The first one is such that there is no parameter through which we can balance accuracy and the computational load, while the second and third are with such a parameter. In spite of this, the first method will be found, in our numerical studies, to give quite a nice approximation in a reasonably short computation time, compared with other methods given in this paper and those available in the literature. It is also shown that our first method has very close relationships to the sampled-data H2 and H problems

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Decision and Control, 1998. Proceedings of the 37th IEEE Conference on  (Volume:1 )

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