arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.09736cs.ROstat.ML
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基于参数学习的变分推理在飞行器轨迹估计中的应用

Variational Inference with Parameter Learning Applied to Vehicle Trajectory Estimation

Jeremy N. Wong, David J. Yoon, Angela P. Schoellig, Timothy D. Barfoot

摘要:

我们在高斯变分推理设置中仅使用噪声测量(即,没有地面实况)。这是在车辆轨迹估计的背景下证明,虽然我们提出的方法是通用的。本文扩展了精确稀疏高斯变分推理(ESGVI)的框架,这是以前被用于大规模的非线性批量状态估计。我们的贡献是在ESGVI框架内额外学习我们的系统模型的参数(在实践中可能很难选择)。在本文中,我们学习车辆轨迹估计中使用的运动和传感器模型的协方差。具体来说,我们学习白噪声加速度运动模型的参数和我们的传感器模型的测量协方差的逆Wishart先验的参数。我们使用一个36公里的数据集来演示我们的技术,该数据集由一辆使用激光雷达的汽车组成,该汽车使用激光雷达对高清地图进行定位;我们在数据的训练部分学习参数,然后表明我们在测试部分实现了高质量的状态估计,即使存在离群值。最后,我们证明了我们的框架可以用来解决姿势图优化,即使有许多假循环关闭。

英文摘要:

We present parameter learning in a Gaussian variational inference setting using only noisy measurements (i.e., no groundtruth). This is demonstrated in the context of vehicle trajectory estimation, although the method we propose is general. The paper extends the Exactly Sparse Gaussian Variational Inference (ESGVI) framework, which has previously been used for large-scale nonlinear batch state estimation. Our contribution is to additionally learn parameters of our system models (which may be difficult to choose in practice) within the ESGVI framework. In this paper, we learn the covariances for the motion and sensor models used within vehicle trajectory estimation. Specifically, we learn the parameters of a white-noise-on-acceleration motion model and the parameters of an Inverse-Wishart prior over measurement covariances for our sensor model. We demonstrate our technique using a 36~km dataset consisting of a car using lidar to localize against a high-definition map; we learn the parameters on a training section of the data and then show that we achieve high-quality state estimates on a test section, even in the presence of outliers. Lastly, we show that our framework can be used to solve pose graph optimization even with many false loop closures.

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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