参数估计法在数控机床故障诊断中的应用

Application of Parameter Estimating on Fault Detection of Servo System of CNC Machine Tool

首先建立了模型参数-子系统参数关联方程,根据系统性能要求,确定了子系统参数的容差限值,因而确定了故障的阈值。结合灵敏度分析与子系统参数的容差限值,总结出模型参数的变化特征与子系统故障的对应关系,得到了表征子系统故障的特征向量表。

The model parameters-subsystem parameters function was built. According to the requirements of system performance, the tolerant errors of each subsystem parameter were selected to define the standard of fault. Combining the tolerant errors with sensitivity analysis, the connection between the variety characters of model parameters and the faults of subsystems was summarized. A characteristic vectors table to identify the fault was set up.