基于物理模型和灰色理论的行星轮系胶合损伤定量检测方法

Scuffing damage quantitative detection of planetary gear set based on physical model and grey relational analysis

将物理模型的仿真信号与灰色关联分析方法相结合,提出了直升机主传动系统2K-H行星轮系胶合损伤定量检测的新方法。针对2K-H行星轮系,建立太阳轮胶合损伤的物理模型,通过仿真获得不同严重度的行星轮系损伤振动信号。将仿真信号的特征向量作为灰色关联分析的标准模式,采用灰色关联分析算法分析待检信号,根据得到的关联度对胶合损伤进行定量检测。最后在直升机传动系统故障模拟试验台上开展了故障植入试验,通过试验数据验证了方法的可行性。

Planetary gear set is the critical component of helicopter main transmission system,thus the quantitative detection of planetary gear set is a challenge for condition monitoring of helicopter.A novel approach to detect scuffing damage quantitatively in 2K-H planetary gear set is presented,which is based on the physical model and grey relational analysis of grey theory.Aiming at 2K-H planetary gear set,the physical model of sun gear scuffing damage is developed, and then the simulation signals of scuffing with different level severity are obtained.After that,the feature vectors extracted based on simulation signal are utilized as the standard damage mode of grey relational analysis.Based on the grey relational grade calculated by a grey relational analysis algorithm,the scuffing damage of sun gear in 2K-H planetary gear set is detected quantitatively.Finally,damage seeded tests are carried out on the fault simulation test rig of helicopter transmission system,and the proposed methodology is validated by the test data.