|Table of Contents|

Application of Vondrak Filter in Data Processing of Magnetic Suspension Gyro-total-station(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2012年第04期
Page:
107-110
Research Field:
地球信息科学
Publishing date:

Info

Title:
Application of Vondrak Filter in Data Processing of Magnetic Suspension Gyro-total-station
Author(s):
LI Hui-ru;  YANG Zhi-qiang;  SHI Zhen;  GONG Yun;  ZHAO Min-ning
School of Geological Engineering and Surveying, Chang'an University, Xi'an 710054, Shaanxi, China
Keywords:
magnetic suspension gyro-total-station;  perturbed moment;  random drift;  data processing;  Vondrak Filter;  root mean square;  north-seeking torque
PACS:
P22
DOI:
-
Abstract:
Magnetic suspension gyro-total-station was vulnerable to external perturbed moment, sampling data included random drift, and the mathematical model could not be established because of the random drift, so that Vondrak Filter, which did not build functional model, was used to process the gyro data; a high-precision astronomical baseline was established in Xi'an, the measurements on gyro azimuth based on the baseline were tested with 8 observation sets, and 40 000 groups of north-seeking torques at the first place and the second place for each observation set were processed and smoothed by the means of Vondrak Filter. The results showed that the burrs of data sequence after smoothing with Vondrak Filter were reduced, and the data sequence could reflect the accuracy of north-seeking torque of magnetic suspension gyro-total-station; compared with the raw data, the root mean squares of data smoothed with Vondrak Filter decreased significantly, and data were concentrated; Vondrak Filter could effectively weaken the random drift of magnetic suspension gyro-total-station, improve the accuracy of true north azimuth, eliminate the perturbed information and keep the useful information as far as possible.

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Last Update: 2012-12-20