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Acceleration Operators in the Value Iteration Algorithms for Markov Decision Processes

Research paper by Oleksandr Shlakhter, Chi-Guhn Lee, Dmitry Khmelev, Nasser Jaber

Indexed on: 27 Mar '08Published on: 27 Mar '08Published in: Mathematics - Optimization and Control



Abstract

We study the general approach to accelerating the convergence of the most widely used solution method of Markov decision processes with the total expected discounted reward. Inspired by the monotone behavior of the contraction mappings in the feasible set of the linear programming problem equivalent to the MDP, we establish a class of operators that can be used in combination with a contraction mapping operator in the standard value iteration algorithm and its variants. We then propose two such operators, which can be easily implemented as part of the value iteration algorithm and its variants. Numerical studies show that the computational savings can be significant especially when the discount factor approaches 1 and the transition probability matrix becomes dense, in which the standard value iteration algorithm and its variants suffer from slow convergence.