Robustness margin calculation with dynamic and real parametric uncertainty

The problem of robust stability in feedback control systems with real uncertain parameters and unmodeled dynamics is considered. A robust margin r/sub m/ is defined, and an algorithm to calculate r/sub m/ and the closely related multivariable stability margin k/sub m/ is developed. How robust performance for real parametric uncertainty can be handled in this framework is also shown. The result essentially provides a method to check whether or not the infinity norm of a closed-loop transfer matrix is less than a specified level over a bounded set of real parametric variations.<
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