PT2-Term (able to oscillate)
![](files/Common/function%20blocks/Funktionsbausteine%20DE/Standarduebertragung/PT2-Glied_FB.png)
This function block realizes a second-order lag proportional transitions term that is able to oscillate.
The output oscillates if the attenuation is in the range of 0 < A < 1.
Operations
The PT2-term realizes the following function:
![](files/Common/function%20blocks/Funktionsbausteine%20DE/Standarduebertragung/PT2-Glied_Formel.png)
Step response (variable attenuation, A:D, TC:T):
![](files/Common/function%20blocks/Funktionsbausteine%20DE/Standarduebertragung/PT2-Glied_Diagramm1.png)
Step response (variable time constant, A:D, TC:T):
![](files/Common/function%20blocks/Funktionsbausteine%20DE/Standarduebertragung/PT2-Glied_Diagramm2.png)
Signals
Name | I/O | Type(s) | Function |
---|---|---|---|
X | I | FLOAT | Input signal |
TC | I | FLOAT | Time constant in [s] |
A | I | FLOAT | Attenuation |
Y | O | FLOAT | Output signal |
Comments
This function block is typically used for simulation of dynamic processes.