| Citation: | GAO Yue, ZHANG Wei, LIU Meng, et al. Modeling method for rotor assembly accuracy considering the separation of center of figure and center of mass[J]. Journal of Aerospace Power, 2026, 41（1）：20240708 doi: 10.13224/j.cnki.jasp.20240708
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Focusing on the aero-engine rotor assembly process, a modeling method for the coaxiality deviation and initial unbalance of aero-engine rotor assembly considering the separation of center of figure and center of mass was proposed using spatial vector transformation and geometric tolerance theory. By combining geometric deviation measurement and unbalance measurement, this method modeled the parts based on the benchmark error correction. The assembly phase of each level of disc was taken as the process variable, and an error transfer model based on the Rodrigues formula was established. The experimental results showed that the consistency of rotor feature measurement after benchmark error correction was better than 2 μm, the average prediction error of the deviation transfer model was about 8%, and the optimization effect of initial unbalance was better than 25%. These results could effectively improve the assembly accuracy and efficiency of aero-engine rotor, providing a theoretical support for the optimization of aircraft rotor assembly process.
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