Reliability and speediness are contradictory in the digital communication systems which adopt error control in order to solve reliability .
在数字通信系统中可靠与快速往往是一对矛盾。为了解决可靠性，通信系统都采用了差错控制。
The problem of satisfactory PID control for a class of stochastic systems with constraints on dynamic error coefficient, steady-state output variance and relative stability margin is considered.
研究一类随机系统具有期望的动态误差系数、稳态输出方差和相对稳定裕度约束的满意PID控制问题。
A contour error model has been proposed based on the analysis of control systems of CNC lathe.
通过对CNC控制系统的分析，建立了轮廓误差的数学模型。
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