The issues of PHM system-level application is outlined, and a cognition model for diagnostics and prognostics is built based on the integrity of man-machine-environment.

• 论述了PHM技术系统级应用问题,提出了故障诊断与预测的人-机-环完整性认知模型,并依此对蓬勃发展的故障诊断与故障预测技术进行了分类与综合分析,给出了PHM技术的发展图像。