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应用GO-FLOW法分析了飞机电静液作动器(EHA)的可靠性。首先在EHA单元功能合理划分的基础上,建立了EHA的GO-FLOW可靠性分析模型,采用布尔代数求解描述反馈环的布尔方程,解决了GO-FLOW图不允许存在循环的难题;其次进行了GO-FLOW运算,得到EHA系统在各时间点的可靠度;再次与GO法的结果比较,验证了GO-FLOW法的可行性和准确性;最后通过MATLAB曲线拟合,得到系统可靠度随时间的变化规律,以便及时对系统进行检修和维护。结果表明GO-FLOW法只需一次运算,就可得到系统在各时间点的可靠度,在减小计算复杂度方面较GO法有优势。
The reliability of aircraft electrohydraulic actuator (EHA) is analyzed by GO-FLOW method. Firstly, based on the reasonable division of EHA units, a GO-FLOW reliability analysis model of EHA is established. Boolean algebra is used to solve the Boolean equation describing the feedback loop, which solves the problem that GO-FLOW plots do not allow loops. Secondly, GO-FLOW operation, the reliability of EHA system at each time point is obtained. Compared with the GO method, the feasibility and accuracy of the GO-FLOW method are verified. Finally, the reliability of the system over time The law of change, in order to timely repair and maintenance of the system. The results show that the GO-FLOW method can obtain the reliability of the system at each time point with only one operation, and has the advantage over the GO method in reducing the computational complexity.