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Robust two-degree-of-freedom H control of a seeker scan loop system

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2 Author(s)
Lee, H.-P. ; Agency for Defense Dev., Taejon, South Korea ; Schmidt, D.K.

A parameter-dependent model of a seeker scan loop system is introduced. A new approach to modelling real-valued parameter uncertainties and designing H robust controllers is presented, considering the effect of parameter uncertainties on closed-loop stability and performance, which is formulated within the framework of the standard H optimisation problem by combining the conventional mixed sensitivity and model-matching problems with the robust stability problem. The proposed design procedure is applied to a seeker scan loop system with uncertainties in three parameter values. It is shown that the designed two-degree-of-freedom H controller offers good performance and robustness properties, and that the proposed design scheme is very effective for the robust control of a seeker scan loop system

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Control Theory and Applications, IEE Proceedings -  (Volume:149 ,  Issue: 2 )