arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2104.02709eess.SYcs.ROcs.SY
收藏

最优反馈策略的自适应变式

Adaptive Variants of Optimal Feedback Policies

University of California, Los Angeles(加州大学洛杉矶分校);Massachusetts Institute of Technology(麻省理工学院);Google AI(谷歌人工智能)

Brett T. Lopez, Jean-Jacques E. Slotine

摘要:

在一种新的控制理论框架下,研究了不确定非线性系统的最优反馈策略与在线学习的稳定组合问题。该框架可以系统地用于迁移学习和模拟到真实的应用,其中为标称系统学习的最优策略需要在参数存在显著变化的情况下保持有效。给定有界范围内的未知参数,所得到的自适应控制律保证闭环系统收敛到零代价状态。在线调整的学习率被用作一个关键的稳定机制,并保持确定性等价时,设计最优策略,而不假设不确定性是在控制范围内。该方法是说明熟悉的山地车问题,尽管存在参数模型的不确定性,它产生接近最佳的性能。

英文摘要:

The stable combination of optimal feedback policies with online learning is studied in a new control-theoretic framework for uncertain nonlinear systems. The framework can be systematically used in transfer learning and sim-to-real applications, where an optimal policy learned for a nominal system needs to remain effective in the presence of significant variations in parameters. Given unknown parameters within a bounded range, the resulting adaptive control laws guarantee convergence of the closed-loop system to the state of zero cost. Online adjustment of the learning rate is used as a key stability mechanism, and preserves certainty equivalence when designing optimal policies without assuming uncertainty to be within the control range. The approach is illustrated on the familiar mountain car problem, where it yields near-optimal performance despite the presence of parametric model uncertainty.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑