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H2 optimal semistable stabilization for linear discrete-time dynamical systems with applications to network consensus

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2 Author(s)
Hui, Qing ; Georgia Inst. of Technol., Atlanta ; Haddad, M.M.

In this paper, we develop H2 semistability theory for linear discrete-time dynamical systems. Using this theory, we design H2 optimal semistable controllers for linear dynamical systems. Unlike the standard H2 optimal control problem, a complicating feature of the H2 optimal semistable stabilization problem is that the closed-loop Lyapunov equation guaranteeing semistability can admit multiple solutions. An interesting feature of the proposed approach, however, is that a least squares solution over all possible semistabilizing solutions corresponds to the H2 optimal solution. It is shown that this least squares solution can be characterized by a linear matrix inequality minimization problem. Finally, the proposed framework is used to develop H2 optimal semistable controllers for addressing the consensus control problem in networks of dynamic agents.

Published in:

Decision and Control, 2007 46th IEEE Conference on

Date of Conference:

12-14 Dec. 2007