Digital detection technology is an important guarantee for modern aircraft digital manufacturing. At present

laser tracker is the main digital measurement system widely used in the aviation manufacturing industry

and the iGPS measurement system is a new large-size space measurement system. This paper focuses on Hanzhong Aircraft Branch

AVIC Aircraft Co.

Ltd. using two kinds of digital measurement system for the process of comparative testing and engineering verification

at the same time

conducts a preliminary analysis of both measurement systems by comparing the results. It is concluded that the iGPS measurement system has some advantages over the laser tracker

but the networking accuracy and measuring accuracy are slightly lower

which is restricted by the number of engineering launchers and product structure

and the layout of the digital assembly system

and the measurement accuracy will be further affected. iGPS is more suitable for the digital measurement environment

where the accuracy of measurement is relatively low

the range of measurement is large

and the efficiency of measurement is required to some extent.