A point at which two or more elements have common connection is called node(节点). Suppose that we start at one node in a network and move through a simple element to the node at the other..., if no node was encountered more than once, then the set of nodes and elements that we have passed hrough is defined as path(路径)

Ohm's law states that voltage across many types of conducting materials is directly proportional to the current flowing through the material. U= Ri or R= i R--resis tance()( linear resistor) The resistor is a passive element that cannot deliver power or store energy

81-1 Introduction 1 Circuit models(模型) The voltage source Two active(有源) models The current source The resistor Three passive无源) models The inductor The capacitor

1.自动控制是一门不断发展的、综合性的技术科学 2.自动控制研究的内容及各部分的关系中 3.在实际工程应用和科学研究中发展自动控制 4.航天控制的发展方向

4-1 根轨迹法的基本概念 4-2 根轨迹绘制的基本法则 4-3 广义根轨迹

6-2 输出反馈系统的校正方式与常用校正装置的特性 6-3 串联校正

8-1 非线性控制系统概述 8-2 非线性控制系统的特征 8-3 相平面法 8-4 描述函数法

5-2 频率特性 5-3 典型环节和开环系统频率特性的极坐标图

5-4 典型环节和开环系统频率特性的对数坐标图

2-1 控制系统的时域数学模型 2-2 控制系统的复数域数学模型 2-3 控制系统的结构图与信号流图