Robust Helmert variance component estimation in the integrated surveying adjustment of laser tracker
Author(s): Zhou Yajun, Chen Yi, He Liwei, College of Surveying and Geo-Informatics, Tongji University, Key Laboratory of Modern Engineering Surveying, SBSM
Pages: 51-54
Year: 2016 Issue: 1
Journal: Geotechnical Investigation & Surveying
Keyword: laser tracker; Helmert variance component estimation; integrated surveying adjustment;
Abstract: In the assembly of large precision equipment, the equipment is becoming larger and complexer,a global coordinate system with high accuracy is required. In order to determine the weight of observation values reasonably and weaken the influence of gross error, the robust Helmert variance component estimation is used for all station data to establish rigorous overall surveying adjustment model of laser tracker. The results show that this method can better solve the weight of the observations reasonably,effectively reduce the influence of gross error,thus improve the positioning accuracy.
Pages: 51-54
Year: 2016 Issue: 1
Journal: Geotechnical Investigation & Surveying
Keyword: laser tracker; Helmert variance component estimation; integrated surveying adjustment;
Abstract: In the assembly of large precision equipment, the equipment is becoming larger and complexer,a global coordinate system with high accuracy is required. In order to determine the weight of observation values reasonably and weaken the influence of gross error, the robust Helmert variance component estimation is used for all station data to establish rigorous overall surveying adjustment model of laser tracker. The results show that this method can better solve the weight of the observations reasonably,effectively reduce the influence of gross error,thus improve the positioning accuracy.
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