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为精确评估可重复使用火箭发动机系统可靠性,采用带约束变量的布尔算法将状态分析与故障树分析恰当结合,从而对含故障统计相依组件的复杂多态可重复使用火箭发动机系统进行可靠性分析.以航天飞机主发动机(SSME)为研究对象,对管路多态性及预燃室和涡轮泵之间的故障相依性进行深入研究.结果表明:该布尔算法能够很好地消除组件统计相依性从而简化复杂多态系统故障树,组件之间失效相依性对系统可靠性影响较大,因此需要加强组件多态及相依性的研究来获得更精确的系统可靠度.
In order to accurately evaluate the reliability of reusable rocket engine system, the Boolean algorithm with constraint variables is used to combine state analysis and fault tree analysis. The reliability analysis of the complex polymorphic reusable rocket engine system with fault statistics dependent components Taking the main engine of the space shuttle (SSME) as the research object, the pipeline dependence and fault dependence between the precombustion chamber and the turbo pump are deeply studied.The results show that the Boolean algorithm can eliminate the component dependency Thus simplifying the fault tree of the complex polymorphic system, and the failure dependency between the components has a great influence on the system reliability. Therefore, research on component polymorphism and dependency of the components needs to be strengthened to obtain more accurate system reliability.