1、复数的代数式:F=a+jbj=√-1 2、复数的矢量表示 3、复数的三角式:

In either case, leading or lagging, we say that sinusoids are out of phase () if phase angles equal they are said to be in phase(同相)

The complete response is written as the sum of the forced and the natural response, and the initial conditions are then determined and applied to the complete response to find the values of the constants

The over-damped response---- i()= A,+A, The critically-damped response-- i(t) =e (At+A2) The under-damped- response---it)e-(b1 cos+2 sino)

A1, A,----two arbitrary constants S S2----real numbers or conjugate complex Since the s,t and s,t must be dimensionless, S,, S2----(1/s)

The complete response=the natural response+forced response

The complete response of any RC circuit may also be obtained as the sum of the natural and the forced response

1.电气控制系统的原理设计及工艺设计 2. C534JI立车横梁电气控制系统设计

例1求以下函数的象函数 (1)单位阶跃函数 (2)单位冲击函数 (3)指数函数

The series combination of a resistor and capacitor has a greater practical importance than does the combination of a resistor and an inductor