The dissertation is outlined below . firstly the construction of man b & w marine engine control system is briefly introduced . specifically , construction & logical relationship of the b & w pneumatic control equipment and hardware construction & the speed - regulating principle of dgs - 8800 - the digital governor device are analyzed 本文的主要组织框架为：首先大概介绍了manb & w主机控制系统结构，具体分析了阻w气动控制装置结构组成和逻辑关系以及dgs 8800电子调速装置硬件结构组成和调速原理。
Electric - pneumatic proportion control technology is the core of the pneumatic to control part of virtual instrument system . the hardware regards two high - performance data collecting card pcl - 818ls as the core . the software regards visual basic6 . 0 as the developing platform , uses dynamic link library technology to realize the control on hardware of the virtual instrument , it realizes to be soft interrupt and dma data gather , make single channels data gather frequency up to 40 khz at most under windows system 本套虚拟仪器系统的气动控制部分以电?气比例控制为核心，硬件以两块高性能数据采集卡pcl - 818l为核心，软件以visualbasic6 . 0为开发平台、使用动态连接库技术来实现虚拟仪器对硬件的控制，并且实现了在windows系统下软中断和dma数据采集，使单通道最大数据采集频率达到40khz 。
This thesis regards virtual instrument technology of pc - daq bus as the theoretical foundation , use the similar principle simulation real car operating mode , pneumatic to control and combine together with electro - mechanical integration technology , develop and manufacture this set to apply the pneumatic brake valve spare part performance tests the system synthetically 本论文以pc - daq总线的虚拟仪器技术为理论基础，应用相似原理模拟，实车工况，将气动控制与机电一体化技术相结合，开发研制出了这套气制动阀类零部件性能综合测试系统。
