共查询到19条相似文献,搜索用时 67 毫秒
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介绍了一种基于MEMS陀螺和石英挠性加速度计的低成本捷联惯性导航系统的设计与实现方法。给出了惯性测量单元(IMU)的模型方程,并在全温下对IMU的输出进行补偿;采用"四元数"法进行姿态计算,通过坐标变换、积分运算确定载体的速度、位置;对惯测样机进行了60 s的静态测试,结果表明该系统短期准确度满足SINS/GPS组合导航系统需求。 相似文献
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为了提高激光捷联惯导系统(LSINS)的导航精度,需要测试系统中惯性器件的模型参数。本文设计了一种利用双轴带温控箱速率转台的参数测试方法,测得了系统在各种环境温度下的参数。通过建模补偿有效地减小了LSINS的导航误差。实验结果表明本方法标定精度较高,适用于中等精度LSINS。 相似文献
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基于小波分析的捷联式惯导系统的初始对准方法研究 总被引:2,自引:0,他引:2
对于光纤陀螺捷联式惯导系统,提出了一种新的初始对准方法,采用小波分析方法撮初始对准的有用信号;用二位置法确定初始方向余统矩阵,同时对光纤陀螺的常值漂移和加速度计零偏置进行标定。仿真结果表明了这种方法的有效性。 相似文献
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The basis is given of the possibility of constructing an asymptotically stable self-contained inertial navigation system. 相似文献
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The characteristic features are indicated of a device for measuring absolute acceleration in inertial navigation systems. 相似文献
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Zhang Fuxue 《中国工程科学》2008,10(3):27-30
In order to find out the influence of the instability of angular velocity of the rotating carrier itself on the stability of silicon micromachined gyroscope, the digital model for relative error of the high and low damping gyroscope’s output signal is given respectively, based on the motion equations of the silicon micromachined gyroscope. Theory proved that the output signal error of the silicon micromachined sensor is mainly caused by the instability of damping factor and the angular velocity of the rotating carrier itself. The result of experimentation indicates that the error of proportionality coefficient of output voltage which caused by the instability of the angular velocity of the rotating carrier itself reaches to 4.1 per cent. Theoretical demonstration and experimental verification show that the instability of angular velocity of the rotating carrier itself has an important effect on the stability of low damping silicon micromachined gyroscope. 相似文献
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