Taesam Kang

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An H ∞ based robust controller is designed for a rate-feedback ow-control problem in single-bottleneck communication networks. The controller guarantees stability robustness to uncertain time-varying multiple time-delays in diierent channels. It also brings the queue length at the bottleneck node to the desired steady-state value asymptotically and satisÿes(More)
In a recent work by the authors, an H 1 based ow controller was designed for explicit rate based congestion control in high speed networks. Time delay uncertainties were taken into account when the controller was designed. This paper studies robustness margins, e.g. largest allowable time delay, as functions of a weighting parameter used in the deenition of(More)
In this study, we conduct experimental and consecutive numerical analyses of a flapping tidal current generator with a mirror-type dual configuration with front-swing and rear-swing flappers. An experimental analysis of a small-scale prototype is conducted in a towing tank, and a numerical analysis is conducted by means of two-dimensional computational(More)
The reliability of a navigation system is one of the critical requirements for air or automotive navigation. In order to increase the reliability of the navigation system, failures or faults resulting from the malfunctions of the system should be detected and repaired to keep the system possessing high integrity. This leads to a need for developing high(More)
This paper presents how to use feedback controller with helicopter dynamics state space model. A simplified analysis is presented for controller design using LQR of small scale helicopters for axial & forward flights. Our approach is simple and gives the basic understanding about how to develop controller for solving the stability of linear helicopter(More)