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Title: Prediction-Correction Algorithms for Time-Varying Constrained Optimization

This article develops online algorithms to track solutions of time-varying constrained optimization problems. Particularly, resembling workhorse Kalman filtering-based approaches for dynamical systems, the proposed methods involve prediction-correction steps to provably track the trajectory of the optimal solutions of time-varying convex problems. The merits of existing prediction-correction methods have been shown for unconstrained problems and for setups where computing the inverse of the Hessian of the cost function is computationally affordable. This paper addresses the limitations of existing methods by tackling constrained problems and by designing first-order prediction steps that rely on the Hessian of the cost function (and do not require the computation of its inverse). In addition, the proposed methods are shown to improve the convergence speed of existing prediction-correction methods when applied to unconstrained problems. Numerical simulations corroborate the analytical results and showcase performance and benefits of the proposed algorithms. A realistic application of the proposed method to real-time control of energy resources is presented.
 [1] ;  [2]
  1. IBM Research, Dublin (Ireland)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 1053-587X
Grant/Contract Number:
Accepted Manuscript
Journal Name:
IEEE Transactions on Signal Processing
Additional Journal Information:
Journal Volume: 65; Journal Issue: 20; Journal ID: ISSN 1053-587X
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); NREL Laboratory Directed Research and Development (LDRD)
Country of Publication:
United States
97 MATHEMATICS AND COMPUTING; time-varying optimization; non-stationary optimization; parametric programming; prediction-correction methods; real-time control of energy resources
OSTI Identifier: