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Uncertainty of measurements of podded propulsor performance characteristics

机译：荚状推进器性能特征的测量不确定度

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摘要

One of the fundamental aspects of any physical experiment is the uncertainty or error limits of the measurement. Unfortunately, majority of published model experimental results do not come with the much needed error analysis. It is imperative that a fundamental and rigorous uncertainty assessment is carried out for all measurements, especially for measurements using a newly designed apparatus. This paper presents the uncertainty analysis methodology and results for a newly designed fully functional podded propulsor performance measurement apparatus. The measurements include propeller thrust, torque, rotation rate and advance speed as well as global forces and moments of a pod unit. The facility and measurement systems are briefly described, and detailed uncertainty assessment methodologies with examples for each measurement are provided with descriptions of bias and precision limits and total uncertainties. The generalized methodology can also be used for other relevant measurements.
机译：任何物理实验的基本方面之一是测量的不确定性或误差极限。不幸的是，大多数已发表的模型实验结果都没有非常需要的误差分析。必须对所有测量进行基本而严格的不确定性评估，尤其是对于使用新设计的设备进行的测量。本文介绍了一种不确定性分析方法和新设计的全功能荚式推进器性能测量装置的结果。测量包括螺旋桨推力，扭矩，转速和前进速度，以及吊舱单元的整体力和力矩。简要描述了设施和测量系统，并提供了每种测量示例的详细不确定性评估方法，并提供了偏差和精度限制以及总不确定性的描述。通用方法也可以用于其他相关测量。

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