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A computer-aided method for the design of linear robust controller is studied. The control guarantees asymptotic stability of linear uncertain systems with time-varying uncertainties. The control is designed based on the possible bound of the uncertainty. Necessary and sufficient conditions for quadratic stabilisability are formulated. The controller is first designed by a two level optimisation process...
The problem of stabilising a class of linear uncertain systems by using linear state feedback is addressed. The system possesses uncertainty which is time-varying, unknown, but lies within a prescribed set (hence bounded). No statistical information of the uncertainty is imposed. Nor any match condition is required. Necessary and sufficient conditions for quadratic stabilisability are formulated....
The purpose of this short paper is to apply an approximation to the structured singular value, derived in [8], to analyze robustness difficulties associated with an illconditioned plant discussed in [9].
The purpose of this paper is to investigate the relation between feedback properties at the input and output of a multivariable plant. These properties may differ significantly at frequencies for which the plant transfer function has a high condition number. Furthermore, properties at one point may be relatively insensitive to uncertainty at that point, yet be extremely sensitive to uncertainty at...
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