Filtering Sensory Information with XCSF: Improving Learning Robustness and Robot Arm Control Performance
Filtering Sensory Information with XCSF: Improving Learning Robustness and Robot Arm Control Performance
复制标题
使用 XCSF 过滤感官信息:提高学习鲁棒性和机器人手臂控制性能
DOI:
10.1162/evco_a_00108
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发表时间:
2014
影响因子:
6.8
通讯作者:
Drugowitsch
中科院分区:
文献类型:
--
作者:
Kneissler;Stalph;Drugowitsch
It has been shown previously that the control of a robot arm can be efficiently learned using the XCSF learning classifier system, which is a nonlinear regression system based on evolutionary computation. So far, however, the predictive knowledge about how actual motor activity changes the state of the arm system has not been exploited. In this paper, we utilize the forward velocity kinematics knowledge of XCSF to alleviate the negative effect of noisy sensors for successful learning and control. We incorporate Kalman filtering for estimating successive arm positions, iteratively combining sensory readings with XCSF-based predictions of hand position changes over time. The filtered arm position is used to improve both trajectory planning and further learning of the forward velocity kinematics. We test the approach on a simulated kinematic robot arm model. The results show that the combination can improve learning and control performance significantly. However, it also shows that variance estimates of XCSF prediction may be underestimated, in which case self-delusional spiraling effects can hinder effective learning. Thus, we introduce a heuristic parameter, which can be motivated by theory, and which limits the influence of XCSF's predictions on its own further learning input. As a result, we obtain drastic improvements in noise tolerance, allowing the system to cope with more than 10 times higher noise levels.
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DOI:
--
发表时间:
2006
期刊:
Annual Conference on Genetic and Evolutionary Computation
影响因子:
--
作者:
Martin Volker Butz;P. Lanzi;Stewart W. Wilson
通讯作者:
Stewart W. Wilson
影响因子:
14.3
作者:
Martin Volker Butz;P. Lanzi;Stewart W. Wilson
通讯作者:
Stewart W. Wilson
DOI:
--
发表时间:
2007
期刊:
Annual Conference on Genetic and Evolutionary Computation
影响因子:
--
作者:
Jan Drugowitsch;Alwyn Barry
通讯作者:
Alwyn Barry
DOI:
--
发表时间:
2001
期刊:
影响因子:
--
作者:
Stewart W. Wilson
通讯作者:
Stewart W. Wilson
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
L. Bull
通讯作者:
L. Bull