K. Ito et K. Kunisch, AUGMENTED LAGRANGIAN-SQP METHODS FOR NONLINEAR OPTIMAL-CONTROL PROBLEMS OF TRACKING TYPE, SIAM journal on control and optimization, 34(3), 1996, pp. 874-891
An augmented Lagrangian method with second-order update is developed a
nd its relationship to the sequential quadratic programming method is
described. The rate of convergence proof depends on a second-order suf
ficient optimality condition, which is shown to be satisfied for a cla
ss of nonlinear optimal control problems of tracking type. Numerical e
xamples are included which demonstrate the globalizing effect of the a
ugmented Lagrangian method.