Research method in accuracy improvement of BIW

The influence of the centrifuge s rotating motion on PIGA s test precision was analyzed using the theory of gyro dynamics.

However when certain noise exists in test process, test precision will considerably reduce.

The factors that affecting the test precision and reliability of automatic calorimeter were analyzed in this paper,and the precision and accuracy of automatic calorimeter were improved by taking feasible and effective measures.

Method to improve measuring accuracy of air enthalpy difference test system;

But up to now, there is no published report in the open literature on effect of dowel contact with hole on the measuring accuracy of EPM of compact tension specimen.

The effect of measuring accuracy which is caused by the selecion of reference ground point and high electromagnetic influence is introduced in detail in the auto impulse current measuring system.

The viewpoint is deferent on some questions such as inspection lot, test point, testing precision, and result assessment.

In order to analyse testing precision of centrobaric o f laser facula,atmosphere transmission,image error of optical system,size of infrared CCD photosensitive cell and relative measuring position are studied.

The GPS coordinates conversion and error analysis in radar precision test;

Different measuring programs and steps are introduced based on analysis and accurate calculation to avoid influences of gravity deformation and inflatable deformation on the precision measurements by using seven cubic mirrors and four multi-base, coordinate transformations and the compensation of satellite structure deformation.