Open AccessCoherent H ∞ control for linear quantum passive systems with model uncertainties
Author(s) -
Lu Xiujuan,
Kuang Sen
Publication year - 2019
Publication title -
iet control theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.059
H-Index - 108
eISSN - 1751-8652
pISSN - 1751-8644
DOI - 10.1049/iet-cta.2018.6183
Subject(s) - control theory (sociology) , hamiltonian (control theory) , robust control , bounded function , quantum , quantum system , controller (irrigation) , ordinary differential equation , mathematics , linear system , differential equation , computer science , physics , nonlinear system , quantum mechanics , mathematical analysis , mathematical optimization , control (management) , artificial intelligence , agronomy , biology
The coherent robust H ∞ control problem for a class of linear quantum passive systems with model uncertainties is considered in this study, where both the plant and the controller are described by quantum stochastic differential equations (QSDEs). In the framework of ( S , L , H ) language, the model uncertainties are translated into the uncertainties in the Hamiltonian, the coupling operators, and the scattering matrices. Based on the quantum bounded real lemma, the robust H ∞ controller design of the original uncertain plant is transformed into the controller design of a new scaled system without model uncertainties. Further, the latter is transformed into the solving problem of a couple of Riccati equations and therefore the numerical solutions of the coefficient matrices of QSDEs associated with the controller dynamics are obtained. Finally, numerical simulations on an optical system coupled to three optical channels are performed to verify the effectiveness of the method proposed in this study.