二阶系统频率特性的探究性教学

Exploration Teaching of Second Order System Frequency Characteristic

通过引用力、功和能量等学生熟知的物理概念和典型的二阶系统,本文深入浅出地分析了控制系统受周期性外力作用所产生的稳态输出响应特性。笔者结合"自动控制原理"课程中频率特性的教学,清晰地给出幅值特性和相位特性的概念。教学实践表明,该探究性教学方法有利于提高学生学习的兴趣和主动性,并能有效地培养学生分析问题和解决问题的能力。

When teaching the frequency characteristic of Automatic Control Principles curriculum, the typical second order system and the well-known physics concepts such as force, work and energy are introduced. The conversion from the work to energy of force are also introduced, then the stable response characteristic is analyzed when the control system is applied by a periodic force. This easy-to-understand teaching approach makes students know clearly about the concept of amplitude characteristic and phase characteristic. The teaching practice shows that this exploration teaching method can help students to improve the interest and initiative of learning, and to develop the ability of analyzing and solving problem.