Mesh-Independence for an Augmented Lagrangian-SQP Method in Hilbert Spaces

Authors:
S. Volkwein
Affiliations:
-
Venue:
SIAM Journal on Control and Optimization
Year:
2000

Citing 0
Cited 5

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Abstract

An augmented Lagrangian-SQP algorithm for optimal control of differential equations in Hilbert spaces is analyzed. This algorithm has second-order convergence rate provided that a second-order sufficient optimality condition is satisfied. The internal approximation of this method is investigated, and convergence results are presented. A mesh-independence principle for the augmented Lagrangian-SQP method is proved, which asserts that asymptotically the infinite dimensional algorithm and finite dimensional discretizations have the same convergence property. More precisely, for sufficiently small mesh-size there is at most a difference of one iteration step between the number of steps required by the infinite dimensional method and its discretization to converge within a given tolerance $\varepsilon 0$. The theoretical results are demonstrated by two optimal control problems for the Burgers equation.