| 液体火箭发动机地面试验测量系统可靠性评定 |
| Reliability evaluation of measurement system for liquid rocket engine ground test |
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| 中文摘要: |
| 为解决液体火箭发动机地面试验测量系统可靠性评定信息不全面的问题，对影响液体火箭发动机地面试验测量系统评定的因素进行分析。首先，将性能可靠性指标和功能可靠性指标作为测量系统可靠性的衡量标准，给出了液体火箭发动机地面试验测量系统可靠性的定义。然后，将测量系统不确定度作为性能可靠性指标纳入测量系统可靠度评定体系，建立测量不确定度与经典可靠性之间的联系；将分系统单元失效次数作为功能可靠性的评价指标，制定融合多源可靠性信息的系统可靠性评定策略。之后，阐述了可靠性数据收集、可靠性信息转换、可靠性信息综合、金字塔式系统可靠性评定和基于专家线性加权的可靠性评定的原理及实现方法。最后，以某型号液体火箭发动机地面试验测量系统为例，评定测量系统的可靠性，结果显示融合多源可靠性信息的金字塔式综合评定法能够准确分析液体火箭发动机地面试验测量系统可靠性，基于专家线性加权信息融合评定方法能够定位系统中的重点关注对象，查找薄弱环节。研究成果为行业内技术人员研究、评定测量系统可靠性提供了新的思路和方法，对于提高型号产品质量、测量数据质量和系统可靠性具有重要意义。 |
| 英文摘要: |
| In order to solve the problem of incomplete information in the reliability evaluation of ground test measurement systems for liquid rocket engines, the factors that affect the evaluation of ground test measurement systems for liquid rocket engines are analyzed in this paper. Firstly, the performance reliability index and functional reliability index are used as the measurement standards for the reliability of the measurement system, and the definition of the reliability of the ground test measurement system for liquid rocket engines is given. The uncertainty of the measurement system is incorporated as a performance reliability indicator into the measurement system reliability evaluation system, and the relationship between measurement uncertainty and classical reliability is established. Then, the number of failures of subsystem units is used as an evaluation indicator of functional reliability. A system reliability assessment strategy that integrates multi?source reliability information is developed. Afterwards, the principles and implementation methods of reliability data collection, reliability information conversion, reliability information synthesis, pyramid system reliability evaluation, and reliability evaluation based on expert linear weighting were elaborated. Finally, taking the ground test measurement system of a certain type of liquid rocket engine as an example, the reliability of the measurement system is evaluated. The results show that the pyramid comprehensive evaluation method that integrates multi?source reliability information can accurately analyze the reliability of the ground test measurement system of liquid rocket engines, and the expert linear weighted information fusion evaluation method can locate the key focus objects in the system and identify weak links. Not only does the research result provide new ideas and methods for technical personnel in the industry to study and evaluate the reliability of measurement systems, but it also has great significance for improving the quality of model products, measurement data quality, and system reliability. |
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| 中文关键词: 液体火箭发动机 测量系统 可靠性 测量不确定度 金字塔式综合评定 专家线性加权 |
| 英文关键词:liquid rocket engine measurement system reliability measurement uncertainty pyramid comprehensive evaluation expert linear weighting |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2023.06.12 |
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