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A Contraction Theory-Based Analysis of the Stability of the Deterministic Extended Kalman Filter

机译:基于收缩理论的确定性扩展卡尔曼滤波器稳定性分析

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摘要

The contraction properties of the extended Kalman filter, viewed as a deterministic observer for nonlinear systems, are analyzed. The approach relies on the study of an auxiliary “virtual” dynamical system. Some conditions under which exponential convergence of the state error can be guaranteed are derived. Moreover, contraction provides a simple formalism to study some robustness properties of the filter, especially with respect to measurement errors, as illustrated by a simplified inertial navigation example. This technical note sheds another light on the theoretical properties of this popular observer.
机译:作为非线性系统的确定性观察者,对扩展卡尔曼滤波器的收缩特性进行了分析。该方法依赖于辅助“虚拟”动力学系统的研究。得出了可以保证状态误差指数收敛的一些条件。此外,收缩提供了一种简单的形式主义来研究滤波器的某些鲁棒性,尤其是针对测量误差,如简化的惯性导航示例所示。本技术说明进一步阐明了该流行观察者的理论特性。

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