A modular design of Bayesian networks using expert knowledge: Context-aware home service robot

0957-4174/$ see front matter 2011 Elsevier Ltd. A doi:10.1016/j.eswa.2011.08.118 ⇑ Corresponding author. Tel.: +82 2 2123 2720; fax E-mail addresses: [email protected] sei.ac.kr (S.-B. Cho). 1 Current address: Samsung Electronics, Maetan 3-d Gyeonggi-do, Republic of Korea. Recently, demand for service robots increases, and, particularly, one for personal service robots, which requires robot intelligence, will be expected to increase more. Accordingly, studies on intelligent robots are spreading all over the world. In this situation, we attempt to realize context-awareness for home robot while previous robot research focused on image processing, control and low-level context recognition. This paper uses probabilistic modeling for service robots to provide users with high-level context-aware services required in home environment, and proposes a systematic modeling approach for modeling a number of Bayesian networks. The proposed approach supplements uncertain sensor input using Bayesian network modeling and enhances the efficiency in modeling and reasoning processes using modular design based on domain knowledge. We verify the proposed method is useful as measuring the performance of context-aware module and conducting subjective test. 2011 Elsevier Ltd. All rights reserved.