摘要
在自动控制原理学习中,线性控制系统的频域分析法是一个重要的部分,而Nyquist稳定判据是其中一个重点教学内容。为了提高学生对概念的理解,针对Nyquist稳定判据中的定义、开环幅相频率特性图的绘制、虚轴上有开环极点时图形的绘制以及稳定性判断等容易出错的地方进行了详细的讲解。在Nyquist图绘制方面对起始点和终止点相角的确定进行了分析,对曲线的补画也做了全面地总结,并结合实例进行了说明。
The method of frequency analysis of linear control system is an important part in automation control theory studying,and Nyquist stability criterion is one of the focuses on teaching content.In order to improve students understanding of the concept,the contents of the error-prone carry out details explaining in definition of Nyquist stability criterion,drawing the curve of amplitude and phase frequency characteristics diagram for open-loop system,and drawing the diagram of open-loop poles on the imaginary axis and determine of stability.The determination of starting phase angle point and end phase angle point in the Nyquist mapping is analyzed.How to draw the supplement curve is also given by a comprehensive summary and are described with examples.
出处
《安庆师范学院学报（自然科学版）》
2010年第4期102-106,共5页
Journal of Anqing Teachers College(Natural Science Edition)
基金
安徽省教育厅自然科学基金项目(No.KJ2008B094)资助
