Meanwhile, the set condition that pedestrian crossing transform from non-signal control mode to signal control mode was analyzed by using probability theory and gap acceptance theory.
基于概率论方法和可穿插间隙理论，分析了人行横道由无信号控制方式过渡至信号控制方式的设置条件；
The image processing technology is used in the automatic control system to realize the non-touching measurement of position signal instead of the traditional position measure methods.
系统突破传统的位置测量模式，成功的将图像处理技术引入到自动控制系统中来，实现了位置信号的非接触式测量。
But asynchronous machine is a multivariate close coupling non - linear time - variable parameter system. And it is difficult to control by rule and line through adding exterior signal directly.
而异步电机是一个多变量、强耦合、非线性的时变参数系统，很难直接通过外加信号准确控制电磁转矩。
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