MATLAB示例图和奈氏图

-7.5-7-6.5-6-5.5

-5

M a g n i t u d e (d B )

100

10

1

-1

-0.500.5

1

P h a s e (d e g )

Bode Diagram

Frequency (rad/sec)

-1-0.5

0.5

1

M a g n i t u d e (d B )100

10

1

-1

-0.500.5

1P h a s e (d e g )

Bode Diagram

Frequency (rad/sec)

55.566.57

7.5

M a g n i t u d e (d B )

100

10

1

-1

-0.500.5

1

P h a s e (d e g )

Bode Diagram

Frequency (rad/sec)

-1

-0.8-0.6-0.4-0.200.20.4

Nyquist Diagram

Real Axis

I m a g i n a r y A x i s

-20-15-10-50

5

M a g n i t u d e (d B )

100

10

1

-91

-90.5-90-89.5

-89

P h a s e (d e g )

Bode Diagram

Frequency (rad/sec)

-1

-0.8-0.6-0.4-0.200.20.4

Nyquist Diagram

Real Axis

I m a g i n a r y A x i s

-5051015

20

M a g n i t u d e (d B )

100

10

1

89

89.59090.5

91

P h a s e (d e g )

Bode Diagram

Frequency (rad/sec)

10-210

-1

10

10

1

10

2

10

-210

-1

10

10

1

10

2

10-210

-1

10

10

1

10

2

10-210-1

100

101

10

2

-40

-35

-30

-25

-20

-15

-10

-5

-10000

-500005000

-15

-10

-5

05

10

15

-2

-1.5

-1

-0.5

0.5

11.5

2

root loacus

Real Axis

I m a g i n a r y A x i s