Aim\ To convert change the aim of degrade observer design into finding a feasible solution of a standard LMI. Methods\ The convex optamal technology is used to solving the linear matrix inequality. Results and Conclusion\ A design method of degrade observer for steady random system is given. The condition of filter existency and the computing method of solution are given.
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BalakrishnanV.Convex optimization techniques in robust control[M].Tutorial workshop,CDC SanAntonio,1993.