在此归纳总结了采样频率为中等速度时，仪表核心数据采集模块的三种主要的控制方法。
As the most important part of instrument, it is vital for the control of the kernel data collection module.
取样时通过控制采样流量，使样气流速模拟取样点管道中煤气流速达到等速取样的条件。
When sampling, the speed of sample gas is similar to the actural pipe gas by controlling the sample gas flow.
高速公路上行驶车辆之间存在有如何保持车间距的问题，提出了用等速跟踪控制的设计方案。
There exists the problem of how to keep an appropriate distance between two automobiles on a highway. A track control system at an equal speed is designed to solve this problem.
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