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在实时数字仿真系统中,实时接口设备是仿真机和控制系统实物间的界面,它的性能直接影响着实时数字仿真的精度。本文简要介绍了专为MicroVAX—Ⅱ计算机研制的DSI-4型专用实时接口设备的构成、各功能板的设计,以及DSI-4专用实时接口的工作过程和使用方法。应该指出的是:只要改变连接计算机的总线接口板,DSI-4专用实时接口还可以方便地与其它计算机(例如,CompaQ386机)组成实时数字仿真系统。
In the real-time digital simulation system, the real-time interface device is the interface between the simulation machine and the control system. Its performance directly affects the accuracy of real-time digital simulation. This article briefly introduces the structure of DSI-4 dedicated real-time interface device specially designed for MicroVAX-II computer, the design of each function board and the working process and usage of DSI-4 dedicated real-time interface. It should be noted that DSI-4’s dedicated real-time interface makes it easy to compose real-time digital simulation systems with other computers (such as the CompaQ386) as long as the bus interface board connected to the computer is changed.