基于重要性采样的优势估计器

刘全; 姜玉斌; 胡智慧

doi:10.11959/j.issn.1000-436x.2019122

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基于重要性采样的优势估计器

学术论文 | 更新时间：2024-06-05

- 基于重要性采样的优势估计器
- Advantage estimator based on importance sampling
- 通信学报 2019年40卷第5期页码：108-116
- 作者机构：
  
  1. 苏州大学计算机科学与技术学院，江苏苏州 215006
  2. 苏州大学江苏省计算机信息处理技术重点实验室，江苏苏州 215006
  3. 吉林大学符号计算与知识工程教育部重点实验室，吉林长春 130012
  4. 软件新技术与产业化协同创新中心，江苏南京 210093
- 作者简介：
  
  [ "刘全（1969- ），男，内蒙古牙克石人，博士，苏州大学教授、博士生导师，主要研究方向为智能信息处理、自动推理与机器学习。" ]
  [ "姜玉斌（1994- ），男，江苏盐城人，苏州大学硕士生，主要研究方向为强化学习、深度强化学习。" ]
  [ "胡智慧（1994- ），女，江苏徐州人，苏州大学硕士生，主要研究方向为强化学习、深度强化学习。" ]
- 基金信息：
  
  国家自然科学基金资助项目(61772355);国家自然科学基金资助项目(61702055);国家自然科学基金资助项目(61472262);国家自然科学基金资助项目(61502323);国家自然科学基金资助项目(61502329);江苏省高等学校自然科学研究重大基金资助项目(18KJA520011);江苏省高等学校自然科学研究重大基金资助项目(17KJA520004);吉林大学符号计算与知识工程教育部重点实验室基金资助项目(93K172014K04);吉林大学符号计算与知识工程教育部重点实验室基金资助项目(93K172017K18);苏州市应用基础研究计划基金资助项目(SYG201422)
- DOI：10.11959/j.issn.1000-436x.2019122
  中图分类号： TP391
- 网络首发：2019-05，
  
  纸质出版：2019-05-25
- 稿件说明：
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刘全, 姜玉斌, 胡智慧. 基于重要性采样的优势估计器[J]. 通信学报, 2019,40(5):108-116.

Quan LIU, Yubin JIANG, Zhihui HU. Advantage estimator based on importance sampling[J]. Journal on Communications, 2019, 40(5): 108-116.
刘全, 姜玉斌, 胡智慧. 基于重要性采样的优势估计器[J]. 通信学报, 2019,40(5):108-116. DOI： 10.11959/j.issn.1000-436x.2019122.

Quan LIU, Yubin JIANG, Zhihui HU. Advantage estimator based on importance sampling[J]. Journal on Communications, 2019, 40(5): 108-116. DOI： 10.11959/j.issn.1000-436x.2019122.

摘要

在连续动作任务中，深度强化学习通常采用高斯分布作为策略函数。针对高斯分布策略函数由于截断动作导致算法收敛速度变慢的问题，提出了一种重要性采样优势估计器（ISAE）。该估计器在通用优势估计器（GAE）的基础上，引入了重要性采样机制，通过计算边界动作的目标策略与行动策略比率修正截断动作带来的值函数偏差，提高了算法的收敛速度。此外，ISAE引入了L参数，通过限制重要性采样率的范围，提高了样本的可靠度，保证了网络参数的稳定。为了验证ISAE的有效性，将ISAE与近端策略优化结合并与其他算法在MuJoCo平台上进行比较。实验结果表明，ISAE具有更快的收敛速度。

Abstract

In continuous action tasks

deep reinforcement learning usually uses Gaussian distribution as a policy function.Aiming at the problem that the Gaussian distribution policy function slows down due to the clipped action

an importance sampling advantage estimator was proposed.Based on the general advantage estimator

an importance sampling mechanism was introduced by the estimator to improve the convergence speed of the algorithm and correct the deviation of the value function caused by calculating the target strategy and action strategy ratio of the boundary action.In addition

the L parameter was introduced by ISAE which improved the reliability of the sample and limited the stability of the network parameters by limiting the range of the importance sampling rate.In order to verify the effectiveness of the ISAE

applying it to proximal policy optimization and comparing it with other algorithms on the MuJoCo platform.Experimental results show that ISAE has a faster convergence rate.

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references

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