KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Process Control)-Lec27

KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Process Control)-Lec27

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Chapter 11 Closed-Loop Responses of Simple Control Systems In this section we consider the dynamic behavior of several elementary control problems for disturbance variable and set- point changes. The transient responses can be determined in a straightforward manner if the closed-loop transfer functions are available.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 Chapter 11 Consider the liquid-level control system shown in Fig. 11.15. The liquid level is measured and the level transmitter (LT) output is sent to a feedback controller (LC) that controls liquid level by adjusting volumetric flow rate q 2 . A second inlet flow rate q 1 is the disturbance variable. Assume: 1. The liquid density ρ and the cross-sectional area of the tank A are constant. 2. The flow-head relation is linear, q 3 = h / R . 3. The level transmitter, I/P transducer, and control valve have negligible dynamics. 4. An electronic controller with input and output in % is used (full scale = 100%).
Background image of page 2
3 Chapter 11 Figure 11.15 Liquid-level control system.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Chapter 11 Derivation of the process and disturbance transfer functions
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/22/2009 for the course CHEMICAL CHE 401 taught by Professor Dr.muhammadal-arfaj during the Spring '09 term at King Fahd University of Petroleum & Minerals.

Page1 / 16

KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Process Control)-Lec27

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online