To address the problems of state-space explosion and unclear causal relationships in the safety analysis of IMA system under the future SPO mode, multi-phase mission profiles for the SPO mode were first defined, and the resident applications and fault criteria for different mission phases were identified. The concept of CEA was introduced, and a quantitative computational model for cascading fault propagation was developed. Methods for evaluating the probability of cascading faults and the cascade risk coefficient were designed to assess the propagation speed, scope, and impact severity of faults within the IMA system. Finally, a comparative analysis was conducted under an SPO scenario to examine how cascading faults affect the IMA system across different mission phases and initial fault conditions. The results show that the proposed model can characterize both the direct and indirect impacts of faults in the IMA system. When primary flight control and integrated navigation are initial fault events, cascading faults are more likely to occur, indicating that targeted backup, monitoring, or reconfiguration measures for key resident applications are required.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |