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Mathematical Problems in Engineering
Volume 2016, Article ID 1984634, 19 pages
http://dx.doi.org/10.1155/2016/1984634
Research Article

Data-Based Control for Humanoid Robots Using Support Vector Regression, Fuzzy Logic, and Cubature Kalman Filter

1Department of Electronic Engineering, Shunde Polytechnic, Foshan, Guangdong 528300, China
2School of Automation, Xi’an University of Posts and Telecommunications, Xi’an 710121, China

Received 28 March 2016; Accepted 29 May 2016

Academic Editor: Mohammad D. Aliyu

Copyright © 2016 Liyang Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Time-varying external disturbances cause instability of humanoid robots or even tip robots over. In this work, a trapezoidal fuzzy least squares support vector regression- (TF-LSSVR-) based control system is proposed to learn the external disturbances and increase the zero-moment-point (ZMP) stability margin of humanoid robots. First, the humanoid states and the corresponding control torques of the joints for training the controller are collected by implementing simulation experiments. Secondly, a TF-LSSVR with a time-related trapezoidal fuzzy membership function (TFMF) is proposed to train the controller using the simulated data. Thirdly, the parameters of the proposed TF-LSSVR are updated using a cubature Kalman filter (CKF). Simulation results are provided. The proposed method is shown to be effective in learning and adapting occasional external disturbances and ensuring the stability margin of the robot.