H₂/ H∞ robust control design for a generalized control structure and flight control application

Abstract

The solution of a generalized H₂ optimal control problem is considered where the results apply to one, two and two-and-a-half degrees of freedom controller structures. It is then shown that by choosing a particular robustness cost-weighting term W σ the feedback controller C₀ also becomes H_∞ optimal. By changing this weighting a compromise between H₂ and H_∞ properties can be achieved. The resulting combined H₂/ H_∞ optimal controller minimizes the H_∞ norm in a limiting case. The relationship between the H₂ and H_∞ results is illustrated in a flight control design problem.

Additional information

Notes on contributors

M. J. GRIMBLE

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