在运动中与MEMS-IMU使用多局部线性化检测对齐
Yulu Zhong1,2, Xiyuan Chen1,2, Ning Gao1,2
1School of Instrument Science and Engineering, Southeast University, Nanjing 210018, China.
Sensors (Basel, Switzerland)
|May 14, 2025
概括
本研究引入了一种新的多局部线性化检测方法,用于导航系统的运动对齐. 它改善了初始状态估计,特别是在较差的测量条件下,优于传统方法.
科学领域:
- 导航系统工程 导航系统工程
- 信号处理 信号处理
- 惯性导航 惯性导航 惯性导航
背景情况:
- 准确的初始状态估计对于集成导航系统至关重要.
- 传统的方法往往严重依赖卫星信号,限制了在信号拒绝环境中的性能.
- 微电机系统惯性测量单元 (MEMS-IMU) 广泛使用,但可能会受到噪声的影响.
研究的目的:
- 为集成导航系统开发和评估一种新的移动初始对齐方法.
- 解决卫星依赖方法的局限性,特别是在较差的测量条件下.
- 使用MEMS-IMU提高卡尔曼波器初始状态的估计性能.
主要方法:
- 使用多局部线性化检测方法进行运动中的对齐.
- 采用准统一的四子生成技术来估计多个潜在的初始状态.
- 在多个假设中选择最可能的初始状态时应用了概括的Schweppe概率比率.
主要成果:
- 拟议的方法在恶劣的测量条件下,与基于OBA的方法相比,显示出更高的估计性能.
- 使用MEMS-IMU实现了有效的长时间粗对齐.
- 该方法在卫星信号质量下降的场景中被证明是有利的.
结论:
- 多局部线性化检测方法为运动中的初始对齐提供了一个强大的替代方案.
- 该技术显示出低成本,小型车辆导航系统的巨大潜力.
- 改进的初始状态估计提高了综合导航系统的整体可靠性.
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