Decision Making in Reinforcement Learning Using a Modified Learning Space Based on the Importance of Sensors

• Published in: Journal of sensors Vol. 2013; no. 2013; pp. 1 - 9
• Main Authors: Kishima, Yasutaka, Kimura, Toshihisa, Kurashige, Kentarou
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Puplishing Corporation 01.01.2013; Hindawi Publishing Corporation
• ISSN: 1687-725X; 1687-7268
• DOI: 10.1155/2013/141353

Many studies have been conducted on the application of reinforcement learning (RL) to robots. A robot which is made for general purpose has redundant sensors or actuators because it is difficult to assume an environment that the robot will face and a task that the robot must execute. In this case, Q-space on RL contains redundancy so that the robot must take much time to learn a given task. In this study, we focus on the importance of sensors with regard to a robot’s performance of a particular task. The sensors that are applicable to a task differ according to the task. By using the importance of the sensors, we try to adjust the state number of the sensors and to reduce the size of Q-space. In this paper, we define the measure of importance of a sensor for a task with the correlation between the value of each sensor and reward. A robot calculates the importance of the sensors and makes the size of Q-space smaller. We propose the method which reduces learning space and construct the learning system by putting it in RL. In this paper, we confirm the effectiveness of our proposed system with an experimental robot.