Abstract
While using Electronic Total Station to measure the deflection of the pressure hull, the measurement error was influenced by different selection of common points. To solve this problem, the coordinate values of pressure hull profiles were established at two different coordinate measuring stations. Selecting different position and number of common points to solve the analog circle initial deflection, we obtained the variation of the initial deflection calculation affected by analyzing the initial deflection and middle error of the measure point. The Simulation results show that the common point should be evenly distributed on the pressure hull, and the number of common points should be controlled at 4-7.
Highlights
During the Submarine construction, controlling the initial deflection of the pressure hull is an important part, the current domestic pressure hull measuring method is usually using strut[1,2]
China has already begun the study about using the total station to measure the pressure hull initial deflection [3,4], by using ETC to collect pressure hull profile measuring point data, after the plane fitting and circle fitting, fitted circle is calculated
In the measurement process, there are vertical and horizontal bulkhead barriering inside the submarine, all the measuring point data could not be got in one station, moving the total station is needed, namely transfer station, we can complete the measurement of the pressure hull profile
Summary
During the Submarine construction, controlling the initial deflection of the pressure hull is an important part, the current domestic pressure hull measuring method is usually using strut[1,2]. Measurement results of the strut method recorded by hand, it exist inefficient, large deviation, susceptible to human factors and other shortcomings. This method is difficult to achieve the construction requirements of the modern submarine, and the measurement reliability has not been verified. China has already begun the study about using the total station to measure the pressure hull initial deflection [3,4], by using ETC to collect pressure hull profile measuring point data, after the plane fitting and circle fitting, fitted circle is calculated. Selecting the common points position affect the accuracy of the coordinate transformation, and affect the calculation results of pressure hull radial initial deflection
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