Based on the methods of hardware circuit and line ro circle interpretation, a software layered idea is proposed . in this section, the thesis discusses detailedly the realization routing which managers the bottom hardware using the virtual device driver on the flat of win95 / 98 / 2000 . by this way, some probrem, such as time interpretation and data sampling, can be settled in the cnc sytem of win32 在上面讨论的基础上提出了软件的分层设计思路,在这一部分详细的讨论了在win95982000平台上利用设备驱动程序对底层硬件管理的具体实现途径,解决了在win32下cnc系统中最重要的定时插补与数据采样等问题,然后在此基础上编写了函数库,供给第三方使用。
The vi software technology, the component technology basic principle, virtual instrument software system strongpoint are studied . visual c is used to develop iv based activex control, and data collecting system, which applies scpi instruction and ivi software layered model to communication and control between mcu and daq 并结合当前软件技术的发展趋势,论述了组件技术的基本原理,探讨了基于组件化的虚拟仪器软件构建技术以及用组件化技术构建虚拟仪器的优点,并用visualc++开发了基于虚拟仪器的activex控件。
So, in the design of highly reliable fadec system, it is greatly necessary to enhance research & development of fault-tolerant software system . in this paper, software technique applied to highly reliable fadec system is studied . the fadec system consists of hardware layer based on similarity redundancy technique and software layer based on dissimilarity redundancy technique 面对目前国内关于航空发动机高可靠性fadec软件系统研究工作相对滞后的现状,本文针对硬件层基于相似余度技术,软件层基于非相似余度技术构成高可靠性fadec系统的相关软件技术进行了研究。