Main path identification and sensitivity analysis of encased differential gear trains with cracked sun gear

Jingjing Wang, Rupeng Zhu, Zhanwei Li, Yizhong Sun, Wenzheng Liu, Wenguang Zhou, College of Mechanical , Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing High Speed Gear Manufacturing Co

Journal of Vibration and Control

Published online on February 14, 2026

Abstract

Journal of Vibration and Control, Ahead of Print.
Encased differential gear trains in coaxial-rotor helicopters are prone to faults. However, multiple sources and paths complicate fault identification. This study identifies the main path by combining path power with the system dynamic model, considering ...