Usually , the pci protocol is very complex and uneasy to understand , so we adopt a pci bus interface chip - s5920 produced by amcc inc . the board has showed excellent performance in the practical applications such as the cloud platform controlling system , and gun regulating system etc . at the same time it only needs little alteration when used in other similar industrial controlling systems 采用了amcc公司推出的一种pci总线接口芯片s5920并用c + +语言实现了所有的功能。该板卡应用于云台控制系统以及后面承接的航空发动机油阀调控系统己取得很好效果，稍加改动即可应用于其他类似的工业控制领域。
The construction of conical nozzle is used by pump ' s delivery - valve , making use of the dynamic characteristics of conventional . short pipe to enhance injection pressure . there are three parameters of fuel injection system : response pressure , injection - advanced angle , injection valve bulge high degree , the best match was found by adjusting them 在油泵出油阀端，采取渐缩管结构措施，利用管路动态效应提高喷油压力；对于喷油系统参数：喷油压力、静态供油提前角和油嘴凸出高度，三个参数进行调整试验，找到它们的最佳匹配。
The thesis roots in the item supported by " fifteen " aviation funds , - new type aeronautic linear dc motor ( ldcm ) , study its classes characteristics and work principle , mainly researches the drive and control technique of aeronautic linear dc step motor ( ldcsm ) using in emergency discharging oil valve on airplane 本文源于“十五”航空支撑基金项目-新型航空用直线直流电动机。论文研究了直线直流电动机的分类、特点及其工作原理，重点针对飞机应急放油阀用航空直线直流步进电动机驱动控制技术进行了研究。
Abstract : in this paper , the existed problem of oil discharge s crew at the bottom of internal combustion engine oil reservoir is pointed out , th e consequence is analysed , then puts forward the performance objective required i n the course of draining failure oil on the base of the article , the special oil discharge valve of internal lubricating oil is introduced 文摘:指出了内燃机油底壳上放油螺丝在使用中存在的问题，分析由此而引起的后果，提出了排放失效机油过程中所需达到的要求，介绍了内燃机机油专用放油阀门。
