| 确定实时序贯平差自适应因子取值范围的方法 |
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| 引用本文： | 黄贤源,隋立芬.确定实时序贯平差自适应因子取值范围的方法[J].测绘学院学报,2006(5). |
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| 作者姓名： | 黄贤源 隋立芬 |
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| 作者单位： | 信息工程大学测绘学院 河南郑州450052 |
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| 基金项目： | 国家自然科学基金资助项目(40474007) |
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| 摘 要： | 自适应序贯平差过程中,自适应因子的不同取值可以调节模型参数的先验信息和观测信息在平差过程中的利用程度,从而使未知参数的平差值接近真值。但是自适应因子取值过大或者过小都有可能使平差结果超出后验方差估计的范围,这样平差结果虽然接近真值但是却没有现实意义和实用价值。根据后验方差估计的原理,提出了利用后验方差估计确定序贯平差中自适应因子的取值范围;并给出了相应的计算步骤。通过计算实例证明该方法不仅具有实时序贯平差平衡观测值与参数先验值的功能,而且使计算结果具有实际意义。
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| 关 键 词： | 实时序贯平差 自适应因子 后验方差估计 |
A Method of Measure the Range of the Adaptive Factor in Real-time Sequential Adjustment |
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| HUANG Xian-Yuan,SUI Li-fen.A Method of Measure the Range of the Adaptive Factor in Real-time Sequential Adjustment[J].Journal of Institute of Surveying and Mapping,2006(5). |
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| Authors: | HUANG Xian-Yuan SUI Li-fen |
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| Abstract: | In the process of adaptive realtime sequential adjustment,the different value of adaptive factor will accommodate the use of the prior model information and the posterior observe information,then the precise result will be gained.But if the value of the adaptive factor is large or small,the results will go beyond the range of parameter and then bring on lossing realistic meaning.In order to make the results with the practical value,a method to measure the range of the adaptive factor in the real-time sequential adjustment is brought up on the ground of the variance component estimation principle It is shown by the calculation that the method not only include the function of real-time sequential adjustment but also has the actual meanings. |
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| Keywords: | real-time sequential adjustment adaptive factor variance component estimation |
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