Browsing by Subject "Systems with time-delays"

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    Delay-Aware Control Designs of Wide-Area Power Networks
    (Elsevier B.V., 2017) Dibaji, Seyed Mehran; Yıldız, Yıldıray; Annaswamy, Anuradha; Chakrabortty, Aranya; Soudbakhsh, Damoon
    A co-design of the implementation platform and control strategies for wide-area power networks is addressed. Limited and shared resources among control and non-control applications introduce delays in transmitted messages. The design is based on a delay-aware architecture and cloud computing has been proposed for damping wide-area oscillations. We accommodate possibly large delays in the network and take into account their values in the designs. Moreover, we design output feedbacks for the cases that some state variables are not accessible. The designs are verified through a simulation on 50-bus Australian model. © 2017
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    Robustness and delay margin analysis of a gene regulatory network model
    (Elsevier, 2022-10-10) Öztürk, Dilan; Özbay, Hitay; Atay, Fatihcan M.
    In the past, a special type of nonlinear delay differential system structure was proposed for gene regulatory networks. For this cyclic dynamical system, stability analysis was done using various tools from systems theory. This paper investigates robust stability of an extended gene regulatory network model with time delayed negative feedback. Specifically, the delay margin analysis is done for this system under multiplicative uncertainty. The effect of uncertainty on the delay margin is determined. It is also shown that for particular higher order extensions of the model it is possible to improve the delay margin.