Dual-observation adjustment model of large control network for underground

He-Fang Bian; Shu-bi Zhang; Qiu-zhao Zhang

doi:10.1117/12.885398

28 December 2010 Dual-observation adjustment model of large control network for underground

He-Fang Bian, Shu-bi Zhang, Qiu-zhao Zhang

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75446H (2010) https://doi.org/10.1117/12.885398
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

The dual-observation adjustment model is proposed, which has advantages of meeting the necessary abundant observations for posterior estimation and improving precision and reliability of network adjustment. This model is characterized by more condition equations and easier to meet the estimable condition of posteriori estimation. A example is calculated by the model. The result show that differences, between true values and adjusted values used typical method of three gyroscopic sides, are -7", -62", -54" respectively, but the differences of Helmert method are -10",-12",-15".The studies we have performed indicate that the proposed model dramatically improves the precision and reliability of control network adjustment for underground by Helmert variance component estimation. Consequently, the model is particularly suitable for precision data processing of underground control network, and also provides theoretical basis for designing the surveying scheme of precision control network.

Citation Download Citation

He-Fang Bian, Shu-bi Zhang, and Qiu-zhao Zhang "Dual-observation adjustment model of large control network for underground", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75446H (28 December 2010); https://doi.org/10.1117/12.885398

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