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针对SINS/GPS组合导航系统的特点,建立了系统的非线性误差模型。根据系统状态方程为非线性而观测方程为线性的特点,将一种简化的UKF方法(Rao-Blackwellisation Additive Unscented Kalman Filter,RBAUKF)用于SINS/GPS组合导航系统中,RBAUKF采用较少的采样点数目和简化的更新算法,降低了计算复杂度。最后,在机动条件下,进行了SINS/GPS组合导航实验仿真。仿真结果表明,RBAUKF相比EKF具有更高的滤波精度,更适合在SINS/GPS组合导航系统中应用。 相似文献
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卡尔曼/粒子滤波器在船用组合导航中的应用 总被引:1,自引:0,他引:1
采用将全球定位系统GPS(Global Positioning System)与捷联惯性导航系统SINS(Strapdown Inertial Navigation System)进行组合导航的方式,组合后系统性能将优于GPS或SINS单独使用时的任一系统。介绍了基本粒子滤波器算法原理并对卡尔曼/粒子组合滤波器在船用GPS/SINS组合导航中的实现形式及算法特点进行了研究。仿真结果表明,对于船用SINS/GPS组合导航问题,卡尔曼/粒子组合滤波器能够获得较高的滤波精度,满足实际船用导航要求。 相似文献
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高精度的导航定位是潜艇研究中所面临的主要难题之一。采用GPS辅助的INS/DVL组合导航是目前潜艇的主流导航模式。当前实现GPS/INS/DVL组合导航的技术主要有航迹推算和卡尔曼滤波。本文将卡尔曼滤波技术应用于潜艇组合导航,并把EKF与传统的DR方法进行了仿真比较研究。结果表明,EKF的估计精度较高。 相似文献
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长航时捷联惯导系统综合校正方法 总被引:2,自引:0,他引:2
针对捷联惯导系统长时间工作时导航误差随时间发散的问题,提出一种适用于长航时捷联惯导系统的综合校正算法.首先建立了惯性系下的φ方程,在此基础上推导了陀螺误差引起的惯性系下φ角增量表达式,并通过φ角增量与观测量(位置误差和航向误差)之间的关系,建立起陀螺误差与观测量之间的关系,进而利用不定期获取的参考位置和航向信息计算陀螺漂移并进行修正.理论和实验分析表明,所提出的综合校正方法明显地抑制了捷联惯导误差随时间的发散,可有效提高长航时捷联惯导系统的导航精度,且该方法不受载体运动和纬度变化的影响,具有很强的工程实用价值. 相似文献
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在引入了姿态观测量的基于卡尔曼滤波器的GPS/SINS组合导航系统中,GPS天线体坐标系与IMu所在的载体坐标系由于安装误差或其他原因不能完全重合,两个坐标系之间存在失准角,导致GPS与SINS输出的姿态信息在空间不同步,这将严重影响卡尔曼滤波的效果。针对这一问题进行了深入的研究,分析了姿态测量数据空间不同步的原因,给出了静态和动基座情况下标定两个坐标系位置关系的若干方法并进行仿真分析验证了其可行性。 相似文献
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There are many filtering methods that can be used for the initial alignment of an integrated inertial navigation system. This paper discussed the use of GPS, but focused on two kinds of filters for the initial alignment of an integrated strapdown inertial navigation system (SINS). One method is based on the Kalman filter (KF), and the other is based on the robust filter. Simulation results showed that the filter provides a quick transient response and a little more accurate estimate than KF, given substantial process noise or unknown noise statistics. So the robust filter is an effective and useful method for initial alignment of SINS. This research should make the use of SINS more popular, and is also a step for further research. 相似文献
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Comparison of robust H∞ filter and Kalman filter for initial alignment of inertial navigation system
There are many filtering methods that can be used for the initial alignment of an integrated inertial navigation system.This paper discussed the use of GPS,but focused on two kinds of filters for the initial alignment of an integrated strapdown inertial navigation system (SINS).One method is based on the Kalman filter (KF),and the other is based on the robust filter.Simulation results showed that the filter provides a quick transient response and a little more accurate estimate than KF,given substantial process noise or unknown noise statistics.So the robust filter is an effective and useful method for initial alignment of SINS.This research should make the use of SINS more popular,and is also a step for further research. 相似文献
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Comparison of robust H∞ filter and Kalman filter for initial alignment of inertial navigation system
There are many filtering methods that can be used for the initial alignment of an integrated inertial navigation system. This paper discussed the use of GPS, but focused on two kinds of filters for the initial alignment of an integrated strapdown inertial navigation system (SINS). One method is based on the Kalman filter (KF), and the other is based on the robust filter. Simulation results showed that the filter provides a quick transient response and a little more accurate estimate than KF, given substantial process noise or unknown noise statistics. So the robust filter is an effective and useful method for initial alignment of SINS. This research should make the use of SINS more popular, and is also a step for further research. 相似文献
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基于浮点DSP的SINS/GPS舰船导航计算机设计 总被引:2,自引:0,他引:2
导航计算机是航行器导航系统的重要组成部分。介绍一种基于DSPTMS320VC33的光纤SINS/GPS组合导航系统,主从式多处理器结构、高精度数据采集电路、双口RAM并行数据传送模式、FPGA接口电路的设计以及系统软件设计,实验证明该系统具有实时性好、精度高、体积小的优点。 相似文献
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重力辅助导航的拐点判据算法 总被引:1,自引:0,他引:1
通过对重力场特征参数进行研究,发现重力场特征参数曲线拐点与重力匹配有效的区域有内在联系,提出了一种基于拐点判据的重力辅助导航算法,该算法运用拐点选择和拐点扩充机制,对重力场特征曲线拐点进行选择和扩充,得到重力有效匹配区域,在惯导/重力/计程仪组合导航系统仿真机上进行仿真试验,试验结果表明:该算法能对重力匹配区域做出较好的判断,能有效提高重力辅助导航系统的精度。 相似文献
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Jamshaid Ali Muhammad Ushaq Salman Majeed 《Journal of Marine Science and Technology》2012,17(3):340-348
The strapdown inertial navigation system (SINS) is able to provide continuous estimates of a vehicle??s velocity, position and attitude. As a rule, the SIMS component known as a high accuracy strapdown inertial measurement unit (SIMU) is an exceptionally expensive system. Less expensive SIMUs comprised of low cost sensors suffer from degraded performance, but this can be compensated for, in part, by addition of a velocity data recorder (VDR) to accompany the SINS. In this configuration, the need frequently arises to align the SINS of a submarine to in order to avoid a long run-up of the inertial system before a start command is issued. This in-motion alignment (IMA) can be accomplished by integrating SINS data with some external aiding source, such as the VDR, by using some form of measurement matching method. Accordingly, this paper demonstrates a consistent IMA scheme for a low-cost SIMU using a robust Kalman/ $ H_{\infty } $ filter structure. An error model of the SINS is derived in which the state vector includes attitude, velocity, position and sensor errors. Velocity information from the VDR is used as a measurement to the proposed filter. All significant equations concerning navigation are presented in conjunction with argument. Results show the advantages of the approach and emphasize diverse aspects of the SINS. 相似文献
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Initial alignment technology is directly related to the navigation accuracy and startup time of the strap-down inertial navigation system (SINS), and has always been regarded as a challenging focal point in the research field of inertial navigation. This paper makes a comprehensive survey of SINS initial alignment technology, briefly introduces the basic principles of initial alignment without latitude, coarse alignment with known latitude and precise alignment, and points out their advantages, disadvantages and applicable conditions. The research and effects of existing initial alignment error suppression techniques are then analyzed and discussed. Finally, according to the problems of existing initial alignment methods and the development requirements of the carrier, the future research direction of SINS initial alignment technology is predicted. © 2022 Journal of Clinical Hepatology. All rights reserved. 相似文献
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介绍一种基于DSP TMS320VC33PGA和ARM系列微处理器S3C44B0X构成的光纤捷联/GPS组合导航计算机的设计,详细介绍了系统硬件结构设计、高精度数据采集电路、FPGA接口电路设计、FLASH程序引导设计以及系统软件设计.通过实验室三轴转台实验证明该系统具有实时性好、精度高、体积小的优点. 相似文献
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在捷联惯导系统中,姿态更新算法会对导航精度产生至关重要的影响.旋转矢量法在抑制不可交换性误差及其累积效应方面具有显著的优点.为兼顾姿态解算的实时性与精确性,文中基于旋转矢量双子样算法原理推导其误差补偿项,并进行了圆锥运动环境下的算法优化,以提高算法的动态适应性,从而形成了优化的旋转矢量双子样算法.最后通过与传统四元数法进行对比分析,表明在捷联惯导姿态解算中,采用优化旋转矢量双子样算法不仅可较好满足系统实时性要求,同时还能较明显地提高解算精度. 相似文献