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Paper WeAT8.1

Katudampe Vithanage, Damith Suresh Chathuranga (Ritsumeikan University), Wang, Zhongkui (Ritsumeikan University), Noh, Yohan (King's College London), Nanayakkara, Thrishantha (King's College London), Hirai, Shinichi (Ritsumeikan Univ.)

Robust Real Time Material Classification Algorithm Using Soft Three Axis Tactile Sensor: Evaluation of the Algorithm

Scheduled for presentation during the Regular session "Force and Tactile Sensing 2" (WeAT8), Wednesday, September 30, 2015, 08:30−08:45, Saal C3

2015 IEEE/RSJ International Conference on Intelligent Robots and Systems, Sept 28 - Oct 03, 2015, Congress Center Hamburg, Hamburg, Germany

This information is tentative and subject to change. Compiled on October 19, 2017

Keywords Force and Tactile Sensing, Soft-bodied Robots, Human Centered Robotics

Abstract

Materials and textures identification is a desired ability for robots. Developing such systems require tactile sensors that have enough sensitivity and spatial resolution, and the computational intelligence to meaningfully interpret sensor data. This paper introduces a texture classification algorithm utilizing support vector machine (SVM) classifier. Data taken from a novel three axis tactile sensor that utilize magnetic flux measurements for transduction was used to obtain the three dimensional tactile data. Frobenius norm calculated from the covariance matrix of the above data and the mean values of the three dimensional sensor data were used as features. Palpation velocity and small vertical load variances had minimum influence on the proposed algorithm. We have compared this algorithm with two other classification methods. They are: classify using the feature spatial period that is calculated from principal frequencies of the textures/material, and classify using neural network classifier with special properties of each material's tactile signals as features. For eight classes of material, the proposed algorithm performed faster and more accurately than the comparators when the scanning velocity and the vertical load varied.

 

 

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