Verification of Optimality and Costate Estimation Using Hilbert Space Projection Academic Article uri icon


  • In this paper, we present a direct method for solving optimal control problems based on function approximation using Hilbert space projection. In this approach, the state and control variables are approximated in a finitedimensional Hilbert space, and the state dynamics and the path constraints are imposed using projection. The resulting nonlinear programming problem is analyzed to derive a set of conditions under which the costates of the optimal control problem can be estimated from the associated Karush-Kuhn-Tucker multipliers. It is shown that the estimated costates have the same order of finite-dimensional approximation as the state and control approximations. The numerical results demonstrate that the present method can address a fairly general class of optimal control problems, including problems with state inequality constraints.

published proceedings


author list (cited authors)

  • Singh, B., Bhattacharya, R., & Vadali, S. R.

citation count

  • 4

complete list of authors

  • Singh, Baljeet||Bhattacharya, Raktim||Vadali, Srinivas R

publication date

  • July 2009