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arXiv 1702.04800eess.SYcs.SY
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部分学习动态下的伪谱模型预测控制

Pseudospectral Model Predictive Control under Partially Learned Dynamics

Georgia Institute of Technology(佐治亚理工学院);School of Aerospace Engineering(航空航天工程学院);Institute for Robotics and Intelligent Machines(机器人与智能系统研究所)

Manan Gandhi, Yunpeng Pan, Evangelos Theodorou

AI总结:

本文提出一种半参数化方法,结合传统物理模型和高斯过程回归,用于处理部分学习动态下的轨迹优化问题,并在cart pole和四旋翼模拟中验证了其有效性。

摘要:

受控动态系统的轨迹优化是自主性的重要组成部分,但许多轨迹优化技术受限于底层参数模型的保真度。在机器人领域,缺乏模型知识可通过机器学习技术克服,利用测量数据构建动态模型。本文旨在在这两种方法之间取得平衡,引入半参数化系统动态表示。我们的目标是利用传统物理模型中的大量信息,并结合数据驱动的非参数回归技术,即高斯过程。将此半参数化模型与模型预测伪谱控制相结合,本文在具有未建模阻尼和参数误差的cart pole和四旋翼仿真中展示了该技术。为管理参数不确定性,我们引入一种算法,利用稀疏谱高斯过程(SSGP)在每次 rollout 后进行在线学习。我们在cart pole和四旋翼上实现了这种在线学习技术,然后在Dubin车辆动力学中展示了在线学习和障碍物避让的应用。

英文摘要:

Trajectory optimization of a controlled dynamical system is an essential part of autonomy, however many trajectory optimization techniques are limited by the fidelity of the underlying parametric model. In the field of robotics, a lack of model knowledge can be overcome with machine learning techniques, utilizing measurements to build a dynamical model from the data. This paper aims to take the middle ground between these two approaches by introducing a semi-parametric representation of the underlying system dynamics. Our goal is to leverage the considerable information contained in a traditional physics based model and combine it with a data-driven, non-parametric regression technique known as a Gaussian Process. Integrating this semi-parametric model with model predictive pseudospectral control, we demonstrate this technique on both a cart pole and quadrotor simulation with unmodeled damping and parametric error. In order to manage parametric uncertainty, we introduce an algorithm that utilizes Sparse Spectrum Gaussian Processes (SSGP) for online learning after each rollout. We implement this online learning technique on a cart pole and quadrator, then demonstrate the use of online learning and obstacle avoidance for the dubin vehicle dynamics.

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。

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