系统动力学软件vensim学习之一阶负反馈

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此时GL值为100,LEV状态1初始值为10,具体实现编码,及仿真结果如下。

(01) CONST比例常数=

0.1

Units: **undefined**

(02) DISC偏差3=

GL-LEV状态1

Units: **undefined**

(03) FINAL TIME = 100

Units: Month

The final time for the simulation.

(04) GL=

100

Units: **undefined**

(05) INITIAL TIME = 0

Units: Month

The initial time for the simulation.

(06) LEV状态1= INTEG (

RT速率2,

10)

Units: **undefined**

(07) RT速率2=

CONST比例常数*DISC偏差3

Units: **undefined**

(08) SAVEPER =

TIME STEP

Units: Month [0,?]

The frequency with which output is stored.

(09) TIME STEP = 1

Units: Month [0,?]

The time step for the simulation.

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对应Gl(目标值为0),LEV状态1初始值为100,对应编码及仿真结果如下:

(01) CONST比例常数=

0.1

Units: **undefined**

(02) DISC偏差3=

GL-LEV状态1

Units: **undefined**

(03) FINAL TIME = 40

Units: Month

The final time for the simulation.

(04) GL=

0

Units: **undefined**

(05) INITIAL TIME = 0

Units: Month

The initial time for the simulation.

(06) LEV状态1= INTEG (

RT速率2,

100)

Units: **undefined**

(07) RT速率2=

CONST比例常数*DISC偏差3

Units: **undefined**

(08) SAVEPER =

TIME STEP

Units: Month [0,?]

The frequency with which output is stored.

(09) TIME STEP = 1

Units: Month [0,?]

The time step for the simulation.

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减半时间常数约等于0.69被的系统时间常数。

系统时间常数为CONST常数的倒数。

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