Mobile Robot Path Planning using Q-Learning with Guided Distance and Moving Target Concept
Universiti Tun Hussein Onn Malaysia, Ee Soong Low, Pauline Ong, Universiti Tun Hussein Onn Malaysia, Cheng-Yaw Low, Universiti Tun Hussein Onn Malaysia · International Journal of Integrated Engineering · 2021
Classical Q-learning algorithm is a reinforcement of learning algorithm that has been applied in path planning of mobile robots. However, classical Q-learning suffers from slow convergence rate and high computational time. This is due to the random decision making for direction during the early stage of path planning. Such weakness curtails the ability of mobile robot to make instantaneous decision in real world application. In this study, the distance aspect and moving target concept were added to Q-learning in order to enhance the direction decision making ability and bypassing dead end. With the addition of these features, Q-learning is able to converge faster and generate shorter path. Consequently, the proposed improved Q-learning is able to achieve average improvement of 29.34-94.85%, 18.29-29.69% and 75.76-99.50% in time used, shortest distance and total distance used, respectively.