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External leakage is the main failure mode of airframe hydraulic systems, and which significantly influences the survivability of hydraulic systems. In this paper, the external leakage characteristic of a hydraulic system is described, followed by the analysis methodology of leakage detection. A hydraulic system based on grouping power is proposed, by which the leakage of hydraulic system can be isolated...
Compared with other aircraft types, the operating ambient temperature of high-altitude and long-endurance unmanned vehicle is much lower. This paper addresses the low temperature characteristic of hydraulic system on a high-altitude and long-endurance unmanned vehicle. Some enhancement methodologies are discussed and a self-cycle heating method is recommended to improve the low temperature performance...
Event indentification of hard landing is the hot spot in civil aviation safety research. In this paper, a incremental model to indentify aircraft land status of civil aircraft is presented to support fault diagnosis and structure maintenance. In previous reserach, traditional artificial neural network is used as a classifier for event detection from certain landing parameters. This paper develop a...
This paper is to present a simplified model to estimate aircraft fuel consumption using support vector algorithm. The method developed here can be implemented in fast-time airspace and airfield simulation application. A representative support vector network aided fuel consumption model is developed using data given in the route date and aircraft performance manual, support vector machine is trained...
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