This paper focuses on the weak fault diagnosis of a dual - axes precision gear
transmission system. Firstly, it elaborates on the structure and working
principle of the system. Comprising components like azimuth and pitch channels,
motors, and control units, the pitch channel's gear transmission chain is a key
research area.
Subsequently, fault modes and their harmfulness are analyzed. Different faults
such as tooth surface wear and pitting are considered. These faults can lead to
serious consequences like system failure and mission deviation.
Based on this, a test system is constructed. It includes sensors and a data
acquisition system to simulate faults and collect vibration signals. The signals
are then analyzed to understand the system's behavior.
Finally, a weak fault feature index based on time - domain entropy is developed.
A threshold setting method based on severity index is also proposed. These
methods together enable the accurate diagnosis of weak faults in the system,
which is crucial for ensuring the proper functioning and reliability of the dual
- axes precision gear transmission system.