Abstract
Low-cost inertial measurement units (IMUs) are widely utilized in mobile robot localization due to their affordability and ease of integration. However, their complex, nonlinear, and time-varying noise characteristics often lead to significant degradation in localization accuracy when applied directly for dead reckoning. To overcome this limitation, we propose a novel brain-inspired state estimation framework that combines a spiking neural network (SNN) with an invariant extended Kalman filter (InEKF). The SNN is designed to extract motion-related features from long sequences of IMU data affected by substantial random noise and is trained via a surrogate gradient descent algorithm to enable dynamic adaptation of the covariance noise parameter within the InEKF. By fusing the SNN output with raw IMU measurements, the proposed method enhances the robustness and accuracy of pose estimation. Extensive experiments conducted on the KITTI dataset and real-world data collected using a mobile robot equipped with a low-cost IMU demonstrate that the proposed approach outperforms state-of-the-art methods in localization accuracy and exhibits strong robustness to sensor noise, highlighting its potential for real-world mobile robot applications.
Abstract (translated)
低成本惯性测量单元（IMUs）由于其经济性和易于集成的特性，在移动机器人定位中被广泛应用。然而，当直接用于航位推算时，这些设备复杂的、非线性的和随时间变化的噪声特征常常会导致定位精度显著下降。为克服这一限制，我们提出了一种新型仿脑状态估计框架，该框架结合了脉冲神经网络（SNN）与不变扩展卡尔曼滤波器（InEKF）。SNN被设计用于从受大量随机噪声影响的长时间IMU数据序列中提取运动相关特征，并通过代理梯度下降算法进行训练，以使InEKF中的协方差噪声参数能够动态调整。通过融合SNN输出与原始IMU测量值，所提出的方法增强了姿态估计的鲁棒性和准确性。 在KITTI数据集和使用低成本IMU装备的移动机器人采集的真实世界数据上进行了广泛的实验表明，该方法在定位精度方面优于现有的先进方法，并且对传感器噪声表现出强大的鲁棒性。这一结果凸显了其在现实世界的移动机器人应用中的潜力。
URL
https://arxiv.org/abs/2601.08248
