Fuzzy reinforcement learning in multi-agent systems using internal model of agents

Masters Thesis FUZZY REINFORCEMENT LEARNING IN MULTI-AGENT SYSTEMS USING INTERNAL MODEL OF AGENTS Alper KILIÇ Fırat University Graduate School ofNatural and Applied Sciences Department of Computer Engineering 2002 : Page 50 Recently, delayed reinforcement learning (RL) has been proposed as a strong method for learning in multi-agent systems (MASs). In this method, agents are concerned with the problem of discovering an optimal policy, a function mapping states to actions. The most popular RL technique, Q-learning, has been proven to produce an optimal policy under certain conditions. In this thesis, we consider a multi-agent cooperation problem, and propose a multi-agent reinforcement learning method based on the other agents' actions. In our learning method, the agent under consideration observes other agents' action, and uses the minimax Q-learning using fuzzy state and fuzzy goal representation for updating fuzzy Q values. We also proposed a new method called FQ-learning so as to accelerate convergence of learning process. Keywords: Multi-Agent Systems, Machine Learning, Reinforcement Learning, Q- Learning, Fuzzy Logic. VI