Automation and Drives - SCE

2.5.3Proportional Controlled System with Two Time Delays

The controlled system is called P-T2 system for short.

Figure: Jump Response of the P-T2 system

Tu: Delay time Tg: Transition time

The system consists of the reaction-free series connection of two P-T1 systems that have the time constants TS1 and TS2.

Controllability of P-Tn systems:

Easy to

 

Can still be

 

 

 

 

Difficult to control

control

 

controlled

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

With the rising ratio Tu/Tg, controlling the system becomes more and more difficult.

 

Preface

Fundamentals

Discontinuous Action Controller Controller Block (S)FB41

Setting the System Appendix

 

 

 

 

 

 

 

T I A Training Document

Page 15 of 64

Module

 

 

 

 

B3

Issued: 02/2008

 

 

Control Engineering with STEP 7

Page 15
Image 15
Siemens Module B3 manual Proportional Controlled System with Two Time Delays, Tu Delay time Tg Transition time