异步电机无速度传感器矢量控制系统需解决两个问题：转速的估计和转子磁链的观测。
Two problems must be solved in the speed sensorless Field Oriented Control of induction motor drive: the speed estimation and rotor flux observation.
从临床实践教学质量影响因素看质量控制需坚持全面性、全员性、全过程性和全局性等原则，在此基础上构建质量控制系统模式。
Having considered the factors affecting the quality of teaching, the authors of this paper maintain that the control system should be built up on the principle of all roundness and comprehensiveness.
介绍了一种基于趋势分析和模糊理论的控制技术在电网削峰填谷、最大需量控制领域的应用，简述了其控制工作原理、运行规则和系统组成。
A control technology based on trend analysis and fuzzy theory was presented and its application in peak clipping, valley filling and maximum demand control area of the power network was introduced.
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