| 降低发动机试验稳态压力测量不确定度方法研究 |
| Improvement of Steady State Pressure Measurement Method for Engine Test |
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| 中文摘要: |
| 为降低系统不确定度，分析试验台稳态压力测量系统的各不确定度来源，对降低稳态压力测量系统不确定度的重要因素进行分析并提出相应改进方法。采用压力传感器现场校准方法降低测量系统与检定系统差异引入不确定度，采用三次样条插值法对压力传感器进行温度补偿降低工作环境温度对压力传感器影响引入不确定度。经验证，两种改进方法有效降低了系统的不确定度，该改进方法在其他型号发动机试验以及相关组合件试验中具有重要的推广和应用价值。 |
| 英文摘要: |
| In order to reduce the uncertainty of the system, this paper analyzes the sources of the uncertainty of the steady-state pressure measurement system of the test-bed, analyzes the important factors of reducing the uncertainty of the steady-state pressure measurement system, and proposes the corresponding improvement methods. The in-site calibration method of pressure sensor is used to reduce the uncertainty caused by the difference between the measurement system and the calibration system. The cubic spline interpolation method is used to compensate the temperature of the pressure sensor and reduce the uncertainty of the influence of the working environment temperature on the pressure sensor. Through data verification, the two improved methods effectively reduce the uncertainty of the system. The improved method has important popularization and application value in other engine tests and related assembly tests. |
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| 中文关键词: 发动机试验 稳态压力 压力传感器 现场校准 三次样条插值法 温度补偿 |
| 英文关键词:engine test steady state pressure pressure sensor field calibration cubic spline interpolation temperature compensation |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2020.05.03 |
| 引用本文：杨懿，陈文丽, 贾志杰，王永鹏，吕守国.降低发动机试验稳态压力测量不确定度方法研究[J].计测技术,2020,(5):. |
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