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- 2018
静基座捷联惯导解析法对准研究
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Abstract:
初始对准是捷联惯导系统的关键技术之一，对准精度直接影响到导航系统的导航解算精度，静基座捷联惯导卡尔曼滤波法对准的精度和收敛时间受模型参数以及初始条件的影响，对于低精度的捷联惯导，这种影响更大，滤波结果往往不能收敛，甚至发散。采用解析法对准是解决上述问题的有效途径，针对静基座解析法对准做了系统研究，推导了惯性器件误差的解析表达式，分析了对准时间与仪器误差估计精度的关系。实测试验结果表明，给予适当的对准时间，解析法对准亦可接近极限精度；同时，在解析法初始对准中，等效天向加速度计零偏可得到有效估计；等效天向、北向陀螺漂移虽可估计，但随机游走对估计结果的影响不可忽视
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