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第四章 PowerPoint PPT Presentation


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第四章. 根轨迹法. 主要内容. 4-1 根轨迹与根轨迹方程. 4-2 绘制根轨迹的基本法则. 4-3 开环零、极点变化时的根轨迹. 4-4 系统闭环零、极点分布与阶跃 响应的关系. 4-5 系统阶跃响应的根轨迹分析. 返回主目录. 基本要求. 1. 正确理解开环零、极点和闭环零、极点以及主导极点、偶极子等概念。 2. 正确理解和熟记根轨迹方程 ( 模方程及相角方程 ) 。熟练运用模方程计算根轨迹上任一点的根轨迹增益和开环增益。

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第四章

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3966133


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4-1

4-2

4-3

4-4

4-5


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1.

2.()

3.K


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4.

5.


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Ks

41


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4-1

4-1


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  • K

4-2

4-3


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K


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Ks

4-2


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4-3

4-4


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4-5


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4-6

4-7


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4-8


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4-10


4 8 4 10

48410


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  • D(s)=1+G(s)H(s)=0 4-11

  • G(s)H(s)=-1 4-12

    G(s)H(s)


M n n m 4 12

4-13

mnnm412

s


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4-14

4-15


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4-1

415


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44

41


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(k=0)


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4-5

42


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4-5

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    m < n ( )( )


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    4-6


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    l-hl+h


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    • 021

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    47

    43


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    4-4


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    4-8


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    4-9


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    (b)

    (c)

    (d)


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    45

    412


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    45


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    • n=2

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    47


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    417 47


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    48


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    • n=4

    • (0)(-20)(-2-j4),

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    • 0-20

    • n=4,m=0,4


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    419 48


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    4-18


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    (4-55)

    (4-56)

    43


    3966133

    4-57

    (457)


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    4-9


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    4-20


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    4-10

    K


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    4-21

    3 0,0,

    -1 ;2K


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    4-21 4-10


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    -1+1

    4-22


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    4-23


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    4-11

    4-23


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    4-24

    4-11


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    44


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    R t 1 t

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    4-74

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    4-25

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    4-27

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    3.

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    416


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    4-32


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