基于传动误差法的装载机减速机构故障诊断

Fault Diagnosis of Loader Deceleration Mechanism Based on Transmission Error Method

针对核电装载机减速机构因齿轮轮齿磨损而影响其定位精度的问题,建立了一种包含故障信息的齿轮系统传动误差信号模型;基于传动误差法对减速机构进行故障诊断,便于企业早日发现故障,及时更换故障元件,减少经济损失。运用ADAMS软件仿真包含磨损故障的误差信号。改进了传统计算阶次跟踪重采样方法,对原始时域信号进行角域COT(Computed Order Tracking)处理;对重采样后的信号进行EEMD分解(Ensemble Empirical Mode Decomposition),将故障分量进行阶次分析,找出故障特征频率;进一步,对故障分量进行倒谱分析,准确识别出故障元件。分析结果表明,改进算法使重采样效率提高了2/3;阶次分析与倒谱分析相结合的方法能够有效识别出装载机减速机构的故障元件。

To overcome the problem existing in positioning accuracy because of gear tooth wear for decelerate device of nuclear power loader,a containing fault information of transmission error signal model was established;Based on the transmission error method,the fault diagnosis of the deceleration mechanism is convenient for the enterprise to find the fault at an early date.the error signal of wear fault was simulated by ADAMS software.the traditional calculation order tracking resampling method was improved.the original time domain signal has changed into angle domain signal by COT(Computed Order Tracking)processing;resampling was decomposed by EEMD(Ensemble Empirical Mode Decomposition).the fault characteristic frequency was found out by order analysis of the fault component;further,the fault component was analysised by cepstrum analysis to identify the fault component precisely.The analysis results show that the improved algorithm improves the resampling efficiency by 2/3,and the combination of the step analysis and cepstrum analysis can effectively identify the fault elements of the loader deceleration mechanism.