火箭滚动控制发动机地面热试车测控系统

介绍了一种基于PXI总线的火箭滚动控制发动机地面热试车测控系统，提出在PXI总线的输入输出模块外增加辅助控制逻辑，将实时控制过程分解为控制过程安排环节和安排的执行环节两部分：过程安排环节由PXI完成，执行环节由辅助控制逻辑完成。使用此方法的实时控制响应时间的理论精度可以达到5μs，控制系统实际的执行精度达到0.1 ms.因此，该方法可以弥补仪器总线用于控制时的不足，也可以解决常用多任务计算机操作系统实时性差的问题。

A Measurement and Controlling System of Ground Hot-firing Test for Rocket Roll-control Engine

A measurement and controlling system for hot-firmg test based on PXI-bus was proposed. Besides I/O module of PXI-bus, it adopts auxiliary control logic circuit, which can decompose real time control process into two parts ： process arranging part which is completed by PXI，and executing part which is completed by auxiliary control logic circuit. Theoretical precision of response time for real time* control can be 5 μs, while executing precision of the control system can be 0.1 ms in practice. So, the method mentioned above could make up for the limitation of real time control when using PXI-bus, and also advance real-time management ability of computer system when facing different missions at one time.