# Article

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Keywords:
linear system; time delay; Riccati equation; robust observer design
Summary:
In this paper, a method for $H_\infty$ observer design for linear systems with multiple delays in state and output variables is proposed. The designing method involves attenuating of the disturbance to a pre-specified level. The observer design requires solving certain algebraic Riccati equation. An example is given in order to illustrate the proposed method.
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