Sample efficiency analysis of Neuroevolution algorithms on a quadruped robot

Shengbo Xu, Hirotaka Moriguch, Shinichi Honiden

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

In reinforcement learning tasks with continuous state-action, parameterized policy search has been known to be a powerful method. Applying NeuroEvolution (NE) to optimizing the policy represented by artificial neural network (ANN) is a particularly active research field. In most cases, NE algorithms cost a large amount of trial-and-error (episode) to optimize policies. However, due to time and cost constraints, researchers and practitioners cannot repeat a number of episodes on physical robots. Thus, choosing an efficient NE algorithm is a key to optimize policies with limited time and cost. In this work, our goal is to help users to choose an efficient NE algorithm. We compare and analyze sample efficiency of two successful state-of-the-art NE algorithms: CMA-NeuroES and NEAT in a gait generation task of a quadruped robot. Moreover, we run both algorithms with various initial topologies in order to analyze the performance difference between each topology. From experimental results, we show CMA-NeuroES outperforms NEAT regardless of initial topologies when the limited number of episodes can be executed. Additional experiments conclude that the optimization method for connection weights in NEAT results in its inferior performance to CMA-NeuroES, while a probability-weighted averaging characteristic and self-adaptive factors make CMA-NeuroES to be advantageous.

Original languageEnglish
Title of host publication2013 IEEE Congress on Evolutionary Computation, CEC 2013
Pages2170-2177
Number of pages8
DOIs
Publication statusPublished - 2013 Aug 21
Externally publishedYes
Event2013 IEEE Congress on Evolutionary Computation, CEC 2013 - Cancun, Mexico
Duration: 2013 Jun 202013 Jun 23

Publication series

Name2013 IEEE Congress on Evolutionary Computation, CEC 2013

Other

Other2013 IEEE Congress on Evolutionary Computation, CEC 2013
CountryMexico
CityCancun
Period13/6/2013/6/23

Keywords

  • CMA-NeuroES
  • NEAT
  • evolution
  • neural network
  • neuroevolution

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Theoretical Computer Science

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  • Cite this

    Xu, S., Moriguch, H., & Honiden, S. (2013). Sample efficiency analysis of Neuroevolution algorithms on a quadruped robot. In 2013 IEEE Congress on Evolutionary Computation, CEC 2013 (pp. 2170-2177). [6557826] (2013 IEEE Congress on Evolutionary Computation, CEC 2013). https://doi.org/10.1109/CEC.2013.6557826