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针对转换开关不完全可靠的冷储备飞机供电系统进行可靠性评估,首先建立可靠性模型,然后采用拉普拉斯变换简化计算得到系统可靠度的数学表达式,并运用Matlab软件仿真分析不同开关寿命类型下系统的可靠度。实验结果表明:当开关寿命为指数分布式时,对系统的可靠度影响较大,降低开关的失效率可以明显提高系统的可靠度,此结论可为实际工程应用中制定飞机供电系统的定检、维修策略提供理论依据。
To evaluate the reliability of cold-backup aircraft power supply system with incomplete and reliable transfer switch, the reliability model is first established, and then the mathematical expression of system reliability is simplified by using Laplace transform. The simulation results of different switch lifetimes Type of system reliability. The experimental results show that when the switch life is exponential distribution, the reliability of the system is greatly affected. Reducing the failure rate of the switch can obviously improve the reliability of the system. This conclusion can be used for setting the test of aircraft power supply system in practical engineering application , Maintenance strategy to provide a theoretical basis.