（3）半闭环控制（Semi-Closed Loop Control）是将位置检测装置安装于驱动电动机轴端或安装于传动丝杠端部，间接地测量移动部件（工作台）的实际位置或位移。
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2) 半闭环数控机床(Semi-closed Loop Control) 在驱动电机端部或在传动丝杠端部安装角位移检测装置（光电编码器或感应同步器）， 通过检测电机或丝杠的转角间接测量执行部件的...
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Semi-closed Loop Control System 半闭环控制系统
By theoretical analysis, the closed-loop control system is proved to be semi-global uniformly ultimately bounded (UUB), and the output tracking error converges to a neighborhood of zero.
通过理论分析，证明了闭环控制系统半全局一致终结有界，跟踪误差收敛到零的一个邻域内。
By theoretical analysis, the closed-loop control system is proved to be semi-globally uniformly ultimately bounded with tracking error converging to zero.
理论分析证明了闭环系统是半全局一致终结有界，且跟踪误差收敛到零。
The photoelectric encoder is used for measuring the angular position of rotating ballscrew. Semi closed loop compensation control is realized and system accuracy is improved.
应用光电编码器作为滚珠丝杠转角位置检测元件实现了半闭环补偿控制，提高了系统的精度。
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