飞机备用氧无法接通典型案例研究

氧气系统用于保证飞行员在高空飞行时的生命安全和工作能力、飞行员应急弹射离机时的安全以及用于提高飞行员肌体承受正过载的耐受力,氧源子系统作为氧气系统的关键组成,对保障飞行员生命安全和工作能力至关重要。本文通过分析一起飞机备用氧系统无法接通的典型案例,探究该类型故障的排故思路,为排除此类故障和后续机型改进设计提供参考。

High Voltage High Frequency Power Transformer for Pulsed Power Applications

This paper presents a new topology for a High Voltage （HV） 50 kV, High Frequency （HF） 20 kHz, multi-cored transformer suitable for use in pulsed power application systems. The main requirements are： high voltage capability, small size and weight. The HV, HF transformer is the main critical block of a high frequency power converter system. The transformer must have high electrical efficiency and in the proposed approach has to be optimized by the number of the cores. The transformer concept has been investigated analytically and through software simulations and experiments. This paper introduces the transformer topology and discusses the design procedure. Experimental measurements to predict core losses are also presented. The losses of epoxy coated nanocrystalline are compared to the losses in a new uncoated core.

可靠性增长技术在某型气体转换阀上的应用

将可靠性增长技术运用于某型气体转换阀的设计、试验中,应用对比分析方法分析其失效机理,探讨相应的解决措施,通过相关试验最终选择出符合该产品在机上低温情况下的材料,同时进行部件的结构强度优化设计,使产品寿命和可靠性得到明显提高。