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Image analysis for the fault diagnosis in a rocket engine failure

机译：用于火箭发动机故障的故障诊断的图像分析

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Rocket engine is a complex and accident-frequently-occurring system. Its fault location and cause analysis is challenge.This paper analyze a rocket launching fault based on the video captured by a visible light camera on the rocket during theflight. The primary mission is to judge whether the suspected "flame" is caused by the combustion luminescence or thereflection of sunlight by the fluids. A qualitative and semi-quantitative analysis is carried out from the perspective ofintensity and color. The possibility of self-luminescence is analyzed, and the spectrum from visible to near infrared ofhydrogen and oxygen combustion is measured on the ground. The atomic radiation spectra of Na, Ka and other relatedmetal elements are detected. The combustion brightness and atmospheric scattering brightness are compared. Combiningwith other prior information of the engine, it is considered that the brightness of the re-burning of hydrogen and oxygenshould be lower than the atmospheric scattering brightness. The real color of the suspected "flame" area in the image isanalyzed by using the characteristics of the white balance processing algorithm. By comparing with other similar grayscale and similar color images, it is inferred that the real color is white, and the yellowish of the “flame” is caused bycompensation of the blue background by the automatic white balance of the camera. Based on the above analysis, it isinferred that the "flame" is caused by the reflection of sunlight by liquid particles, not by combustion, and the regionshould be located at the bottom of the rocket.
机译：火箭发动机是一个复杂且频繁发生的系统。它的故障位置和原因分析是一个挑战。 本文基于可见光相机在火箭发射过程中捕获的视频，分析了火箭发射故障。 飞行。主要任务是判断可疑的“火焰”是由燃烧发光引起的还是由燃烧引起的。 液体对太阳光的反射。从以下几个方面进行了定性和半定量分析。 强度和颜色。分析了自发光的可能性，并分析了从可见光到近红外的光谱。 氢气和氧气的燃烧在地面上进行。 Na，Ka及其他相关原子的原子辐射光谱 检测到金属元素。比较燃烧亮度和大气散射亮度。结合 结合发动机的其他先验信息，可以认为氢和氧再燃烧的亮度 应低于大气散射亮度。图像中疑似“火焰”区域的真实颜色为 利用白平衡处理算法的特点进行分析。通过与其他类似的灰色进行比较 比例尺和类似的彩色图像，可以推断出真实的颜色是白色，而“火焰”的淡黄色是由 相机的自动白平衡对蓝色背景进行补偿。根据以上分析，得出 推断“火焰”是由液体粒子而非燃烧引起的太阳光反射引起的，该区域 应该位于火箭的底部。

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