Lifting to Passivity for ${\mathcal{H}}_2$-Gain-Scheduling Synthesis with Full Block Scalings

Abstract

We focus on the ${\mathcal{H}}_2$-gain-scheduling synthesis problem for time-varying parametric scheduling blocks with scalings. Recently, we have presented a solution of this problem for $D$- and positive real scalings by guaranteeing finiteness of the ${\mathcal{H}}_2$-norm for the closed-loop system with suitable linear fractional plant and controller representations. In order to reduce conservatism, we extend these methods to full block scalings by designing a triangular scheduling function and by introducing a new lifting technique for gain-scheduled synthesis that enables convexification.

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• Gain-Scheduling Controller Synthesis for Nested Systems with Full Block Scalings