Electric arc detection method applied to more electric aircraft direct current system

Abstract

The invention discloses an electric arc detection method applied to more electric aircraft direct current system. an electric arc fault of the more electric aircraft direct current system is detectedby using a non-contact type anti-electromagnetic interference arc sensing mode. The electric arc detection method applied to the more electric aircraft direct current system comprises a typical electric arc generation unit, an arc light collection unit, an electric arc light signal processing unit and an electric arc fault judgment and output unit. The electric arc light collection unit is composed of an optical component, a backlight type CCD detector and an image collection and transformation module, used for measuring and collecting light wavelength distribution of electric arcs. An electric arc light feature extraction unit comprises an electric arc light signal pretreatment part, an electric arc light signal denoising part and an electric arc light signal analysis and feature parameter extraction part. According to the extracted effective electric arc light features, a photoelectric detector is selected, the condition that whether the electric arc fault occurs in the target more electric aircraft direct current system is judged, and a result is output. The method provided by the invention is not affected by electromagnetic interference, has the relatively high fault detectionaccuracy, and provides the support for ensuring the normal operation of the more electric aircraft.

Description

Technical field [0001] The invention belongs to the field of on-line monitoring and fault detection, and in particular relates to an arc detection method for a multi-electric aircraft DC system. Background technique [0002] With the continuous progress and development of aerospace technology, the role and status of aerospace equipment in people's travel and national defense strategy is becoming increasingly important. Aircraft is the most common and common aerospace equipment. Airlines hope to reduce the cost of each seat / km by saving aircraft space, and are eager to realize the vision of green and low-carbon. As a result, the elimination of heavy mechanical systems on aircraft, such as air starter duct systems and hot air anti-icing systems, is imminent. Multi-electric aircraft using electricity to replace this large-space high-quality system will provide significant aircraft efficiency benefits, resulting in better environmental performance due to reduced fuel consumption, wh...

AI Technical Summary

Problems solved by technology

The temperature of the arc can reach tens of thousands of degrees Celsius or even higher and it contains strong radiation. Any solid, liquid or gas in the arc area will produce strong physical and chemical changes under the action of the arc, which can easily cause fire. Therefore, it is urgent to develop a Accurate and reliable arc detection method for multi-electric aircraft DC system

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