掌握被控对象的数学模型和建模后控制系统的设计，是过程控制系统分析、设计、调试和获得较高控制品质的基础和关键。
The math model and control system design after modeling are the base and key point to process control system analyses, design, debug and obtain the higher control quality.
动态分析的对象是交流通路，图解法动态分析的关键是作交流负载线。
The most crucial point to the dynamic analysis is the drawing of alternating current load line .
本论文以宝钢热轧厂质检站的液压摆式剪板机为研究对象，对其中的三个关键技术进行分析和研究。
This thesis includes analysis and research three key aspects of the technique on with the project of Swaying Hydraulic Cutter in the Hot Mill Quality Test Station in Baosteel have been confirmed.
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