Abstract
Limits of performance are explored when designing a flight control law for a flexible aircraft and especially the optimization of the wind comfort criterion under an actuator activity and roll-off constraint. When using a linear controller whose order is free, the issue is either to check the feasibility of design specifications, or to compute the maximal achievable performance, or to study the tradeoff between the design specifications. To this aim the Convex Control Design Toolbox is developed, whose aim is the synthesis of multiple-input/multiple-output feedback and feedforward controllers with H ∞ and H 2 specifications on a single plant model. Convex multimodel design is possible in the feedforward case, but parametric robustness specifications render the problem nonconvex in the feedback one.
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