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高速铁路轨道必须保持高平顺性、高稳定性和高可靠性,这直接关系到高速列车高速、安全且平稳运行。高速铁路轨道测量至少包括控制测量、线路测量和变形测量等工作。传统高速铁路轨道测量方法存在测量周期长、维护成本高、检测效率低等问题。
2018年10月9日,由中国电子科技集团公司第五十四研究所牵头承担的国家863计划对地观测与导航技术领域“低成本高精度GNSS/INS深耦合系统与应用示范”项目顺利通过了科技部在石家庄组织的验收。针对城市路面导航和测绘应用中GNSS信号断续、衰落等问题,面向大众车辆车道级导航、专用测绘车高精度导航等应用需求,项目团队经过多年技术攻关,突破了低成本惯性器件、惯性辅助GNSS信号高灵敏度接收、惯性信息...
针对GPS/INS组合导航系统中,由于量测噪声统计的不确定性导致平方根容积卡尔曼滤波器(SCKF)滤波精度下降甚至发散的问题,该文提出一种基于加权的自适应SCKF(WASCKF)方法。该方法首先利用移动开窗理论对SCKF新息的协方差阵进行最大似然估计,实现对测量噪声统计特性的在线调整;然后,利用加权理论,依据窗口内不同时刻信息的有用程度的不同而设置相应的权值,增强对窗口内有用信息的利用。最后,将W...
The early development of mobile mapping system (MMS) was restricted to applications that permitted the determination of the elements of exterior orientation from existing ground control. Mobile mappin...
In the Kalman filter used for the integration of GPS/INS, the inertial sensor error model is usually considered as a random constant or random walk for both gyroscopes and accelerometers. However, th...
The method, the procedure and the results of the calibration of a low cost MEMS INS sensor are described and discussed. The reduced cost of the MEMSs sensors is very advantageous, but these sensors a...
Two Kalman filers have been designed to operate separately to provide a reliable check on the navigation solutions. When GPS signals are available, the GPS measurements are used to update the error st...
This paper presents the current results for the FP7 GINSEC project. Its goal is to build a pre-commercial prototype of a low-cost, accurate and reliable system for the professional UAV market. Low-cos...
Nowadays, Global Positioning System (GPS) receivers are aided by some complementary radio navigation systems and Inertial Navigation Systems (INS) to obtain more accuracy and robustness in land vehicu...
In this paper, a GPS-independent mobile navigation and mapping system is introduced. This system employs the photogrammetric intersection to determine the coordinates of the surrounding objects and t...
Many of the sophisticated control systems of modern automobiles require measurements of the vehicle’s attitude. Commercial GPS attitude systems are the method of choice for measuring attitude in many ...
Santiago Alban is a Ph.D. candidate in the Aeronautics and Astronautics Department of Stanford University. He received his B.S. in Aerospace Engineering in 1996 from the University of Texas at Austin,...
The Joint Precision Approach and Landing System (JPALS) is the next generation aircraft precision approach and landing system being sponsored by US Department of Defense. This GPS-based system will pr...

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