基于维纳过程的直升机传动系统组件磨损可靠性研究

Research on the Wear Reliability of the Transmission System Assembly of Helicopter based on Wiener Process

可靠性设计分析方法是现代直升机设计方法之一,同时也是提高直升机适用性和有效性的有力手段。直升机系统结构复杂,其中,传动系统的相关问题研究尤为重要,其组件的磨损又是导致整套系统可靠性水平降低的最重要、最直接的原因。因此,对传动系统组件进行合理的可靠性研究是十分有必要的。应用随机过程理论,建立了通用的磨损随机过程模型,并在此模型基础上,对设计变量采取两端截尾设计,运用机械模糊可靠性设计方法建立磨损可靠性预测模型,明确了模型中重要参数的确定方法。应用实例分析验证了该磨损可靠性模型具有较高的应用价值,符合工程实际。

The method of reliability design and analysis is one of the modern techniques for helicop- ter design, and also one of the most powerful means to improve applicability and effectiveness of hel- icopter. The systematic structure of helicopter is complicated and the related problems of the trans- mission device system are of particular importance. Besides, transmission device assembly wear is the most important and direct reason for lowering the reliability level of the whole set of system. Therefore, the reasonable research on the wear reliability of the transmission device assembly is quite necessary. Based on the stochastic process theory, the universal model of wear stochastic process was built. The cutting- off- tail design at two ends was adopted to the design variables. The wear reliability prediction model was built by applying the mechanical fuzzy reliability theory on the basis of the wear stochastic process model. The method of determining the important parameters of the model was specified. With the help of example analysis, this wear reliability model was verified to have high application value and meet the engineering practice.