通过这种方差自适应的梯度调整,DSAC-T进一步降低了对奖励尺度的敏感性。 DSAC-T通过期望值替代、双值分布学习,以及基于方差的梯度调整,解决了标准DSAC存在的学习不稳定性和对奖励尺度敏感的问题。这些关键改进为DSAC-T算法的性能提升奠定了基础。 Experiment Conclusion 结论部分: 本文提出了DSAC-T算法,通过三个重要...
智能驾驶课题组(iDLab)提出一种可减少过估计的Distributional Soft Actor-Critic(DSAC)算法,通过学习连续状态-动作回报分布(state-action return distribution)来动态调节Q值的更新过程,并证明引入该分布降低过估计的原理。本文基于异步并行计算框架PABAL来实施DSAC算法,Mujoco环境的验证表明:相比于目前最流行的强化学习算法...
我们于2021年在IEEE TNNLS发表了DSAC一文(DSAC-v1,论文链接:https://ieeexplore.ieee.org/abstract/document/9448360),该工作相比于SAC有效抑制过估计并实现性能大幅提升,但该版本仍存在一些训练不稳定等问题。为此,我们基于DSAC-v1的基础上,进行三项改进,于今推出了DSAC-T,该版本不仅能显著降低Q值的过估计现象,...
然而,Q值的高估问题一直是制约RL算法性能的“顽疾”。 2021年,清华大学智能驾驶课题组(iDLab)在IEEE TNNLS期刊发表值分布强化学习算法DSAC(Distributional Soft Actor-Critic),通过学习连续状态-动作回报分布来动态调节Q值的更新过程从而减少其过估计(https://mp.weixin.qq.com/s/p2ZzTYjh5IpnlvW29qzXxQ)。经过四年...
Distributional Soft Actor-Critic (DSAC) Requires Windows 7 or greater or Linux. Python 3.8. The installation path must be in English. Installation # Please make sure not to include Chinese characters in the installation path, as it may result in a failed execution. # clone DSAC_v1 reposit...
Distributional Soft Actor-Critic with Three Refinements (DSAC-T) Requires Windows 7 or greater or Linux. Python 3.8. The installation path must be in English. Installation #Please make sure not to include Chinese characters in the installation path, as it may result in a failed execution.#clon...
通过这一项改进,DSAC-T减少了对人工调参的需要,使算法更具通用性。 (3)Twin value distribution learning: 在DSAC-T中通过学习两个独立的值分布网络参数,在计算梯度时选择其中均值较小的一个,并以此作为critic更新时的目标分布。这样可以引入适度的低估偏差,并进一步抑制过估计问题,获得更加稳定的学习过程。 实验...
Distributional Soft Actor-Critic (DSAC) Requires Windows 7 or greater or Linux. Python 3.8. The installation path must be in English. Installation #Please make sure not to include Chinese characters in the installation path, as it may result in a failed execution.#clone DSAC_v1 repositorygit...
Distributional Soft Actor-Critic with Three Refinements (DSAC-T) Requires Windows 7 or greater or Linux. Python 3.8. The installation path must be in English. Installation #Please make sure not to include Chinese characters in the installation path, as it may result in a failed execution.#clon...
Distributional Soft Actor-Critic with Three Refinements (DSAC-T) Requires Windows 7 or greater or Linux. Python 3.8. The installation path must be in English. Installation # Please make sure not to include Chinese characters in the installation path, as it may result in a failed execution. #...