摘要
为了探究齿轮裂纹损伤对行星轮系编码器信号的影响机理,以利用编码器信号对行星齿轮箱进行健康监测,通过动力学分析研究了在齿轮裂纹损伤影响下行星轮系编码器信号的响应特性,并建立了响应的模型。首先采用能量法推导了齿轮存在裂纹时的时变啮合刚度算法,并构建了扭转动力学模型,用于获取编码器信号;在此基础上,通过将行星轮裂纹时的啮合刚度代入构建的模型中,求解得到行星轮裂纹影响下的编码器响应信号,分析编码器信号中蕴含的扭转振动特征;最后根据模型进一步研究了不同裂纹损伤下的行星轮系编码器响应信号。在实验台上进行了验证,结果表明:当行星轮出现裂纹故障时,编码器响应信号中蕴含的扭转振动出现明显冲击特征;随着裂纹损伤程度增加,编码器响应信号中扭转振动的冲击特征逐渐增强,其均方根值与峭度值明显增加,可有效评估故障损伤程度。该研究结果可为编码器信号用于行星齿轮箱健康监测提供理论依据。
Dynamic analysis is applied to study the response characteristics of the encoder signal of planetary gears with crack damage and to deal with the problems that the influencing mechanism of gear crack damage on the encoder signal of planetary gear is still unknown and the health monitoring of planetary gear box based on the encoder signal lacks theoretical basis.Firstly,the energy method is used to derive a time-varying meshing stiffness algorithm when the gear cracks,and a pure torsion dynamics model of the planetary gear system is constructed.Then the meshing stiffness of the cracked gear is substituted into the constructed model,and solving the model obtains the encoder response signal under the influence of the planetary wheel crack.The torsional vibration characteristics contained in the encoder signal are analyzed.Finally,the encoder response signals of planetary gear under different crack damages are studied based on the model.The results show that the torsional vibration in the encoder response signal has obvious impact characteristic when the planetary wheel cracks.With the increase of crack damage degree,the shock characteristic of torsional vibration in the encoder signal is gradually enhanced,and the root mean square value and kurtosis value are obviously increased,which can be used to effectively evaluate the degree of fault damage.This research may provide a theoretical basis for the use of encoder signal in health monitoring of planetary gear box.
作者
刘振
孔德同
赵明
马志鹏
LIU Zhen;KONG Detong;ZHAO Ming;MA Zhipeng(State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710049,China;School of Mechanical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Huadian Electric Power Research Institute Co.Ltd.,Hangzhou 310030,China)
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2020年第2期43-50,共8页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目(51875434)
陕西省自然科学基金资助项目(2019JM-278)
关键词
行星轮系
编码器信号
动力学分析
时变啮合刚度
裂纹损伤
planetary gear set
encoder signal
dynamic analysis
time-varying mesh stiffness
crack damage
