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Control of a dual-stage actuator in hard disk drives presents a challenge to best distribute control effort among two actuators, avoid saturation and satisfy time-varying control objectives. This paper presents a switched controller design approach to address these issues. It is shown that an output regulating controller parameterization facilitates controller switching with guarantees of stability,...
A Youla-like parameterization method is developed for multi-objective output regulating controllers meeting a suboptimal H2 performance level. Many engineering applications, from management of nuclear power to hard disk data, all incorporate a form of regulation in terms of asymptotic tracking and disturbance rejection of a fully or partially known disturbance. The ability to directly define a convex...
The output regulation problem is a classic problem which needs updated machinery to be effectively applied in a switched or blended controller setting. For stabilizing controllers approaches with Youla parameterization has been crucial to the solution of many complex controller switching problems. This paper seeks similar benefits by developing a state-space based parameterization of output regulating...
The thermodynamic driving force for domain growth in a rank-2 laminated ferroelectric crystal is derived in this article, and we used it, together with a homogenization theory, to study the issue of enhanced electrostrictive actuation recently reported by Burcsu et al. [2004. Large electrostrictive actuation of barium titanate single crystals. J. Mech. Phys. Solids 52, 823–846]. We derived this force...
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