本文提出了一种基于分形的航天器故障检测新方法。由于故障发生时系统表现异常 ,这些异常可导致测量信号分形维数的变化 ,根据这些变化可进行故障检测。基于分形的故障检测方法可以实现实时的检测系统的状态 ,包括系统的动态变量以及静态参数。该方法还能将测量信号的分析处理和故障的定位很好地结合起来。 In this paper, a new method of spacecraft fault detection based on fractal is proposed. These abnormalities can lead to changes in the fractal dimension of the measured signal due to abnormal system behavior at the time of the fault. Based on these changes, fault detection can be performed. The fractal-based fault detection method can detect the real-time status of the system, including the system dynamic variables and static parameters. The method can also combine the analysis of the measurement signal and the localization of the fault.