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- Title
一种车载免置平全站仪概略位姿求解方法.
- Authors
曹娟华; 朱洪涛; 吴维军; 魏 晖; 殷 华; 朱 敏
- Abstract
The “ relative + absolute ” composite measurement is the main direction of research and development of track measurement technology, and it also has a broad application prospect in the maintenance of existing railways. Stationing without leveling of the on-board electronic total station (ETS) is an important link in the compound measurement. The method to solve the approximate position and posture of the on-board leveling-free ETS independent of line design alignment is the key to the efficiency of the leveling-free stationing and its line measurement, and affects the adaptability of the composite measurement mode in different measurement conditions. The dimension-reduced estimation parameters and solution of stationing unknowns quantity are realized based on virtual horizontal coordinate system of ETS without depending on the line design alignment. Then a model of approximate position and posture solution is constructed, and the approximate position and posture of leveling-free stationing are solved based on two CPIII control points. This method is exquisite in conception and clear in principle, which lays a foundation for the improvement of stationing efficiency and measurement automation. The theoretical analysis shows that an accurate station information can be obtained, and when it is used to estimate the aiming direction of follow-up CPIII control point, the maximum mean square error of aiming direction is less than 0. 29 degree, which is far less than the theoretical allowable value of 0. 67 degree. The line tests show that the target to be measured can be located accurately in the process of automatic stationing with aiming error no more than 0. 5 degree, and the method is highly practicable.
- Subjects
PARAMETER estimation; POSTURE; RESEARCH &; development; RAILROADS; AUTOMATION
- Publication
Railway Standard Design, 2022, Vol 66, Issue 7, p30
- ISSN
1004-2954
- Publication type
Article
- DOI
10.13238/j.issn.1004-2954.202101220001