Towards autonomous robots via an incremental clustering and associative learning architecture

Matthias U. Keysermann, Patrícia A. Vargas

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents a novel architecture for associative learning and recall of different sensor and actuator patterns. A modular design allows the inclusion of various input and output modalities. The approach is a generic one that can deal with any kind of multidimensional real-valued data. Sensory data are incrementally grouped into clusters, which represent different categories of the input data. Clusters of different sensors or actuators are associated with each other based on the co-occurrence of corresponding inputs. Upon presenting a previously learned pattern as a cue, associated patterns can be recalled. The proposed architecture has been evaluated in a practical situation in which a robot had to associate visual patterns in the form of road signs with different configurations of its arm joints. This experiment assessed how long it takes to learn stable representations of the input patterns and tested the recall performance for different durations of learning. Depending on the dimensionality of the data, stable representations require many inputs to be formed and only over time similar small clusters are combined into larger clusters. Nevertheless, sufficiently good recall can be achieved earlier when the topology is still in an immature state and similar patterns are distributed over several clusters. The proposed architecture tolerates small variations in the inputs and can generalise over the varying perceptions of specific patterns but remains sensitive to fine geometrical shapes.

Original languageEnglish
Pages (from-to)414-433
Number of pages20
JournalCognitive Computation
Volume7
Issue number4
Early online date26 Nov 2014
DOIs
Publication statusPublished - Aug 2015

Keywords

  • Associative learning
  • Autonomous robotics
  • Clustering
  • Incremental learning
  • Robot experiment
  • Unsupervised learning

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Computer Science Applications
  • Computer Vision and Pattern Recognition

Fingerprint Dive into the research topics of 'Towards autonomous robots via an incremental clustering and associative learning architecture'. Together they form a unique fingerprint.

  • Profiles

    Cite this