Title: Pressure System Frequency Response
1 -Pressure
System-Frequency Response
- Cory Richardson
- Dennis To
- Jamison Linden
- 11/18/2009, UTC, ENGR-329
2Contents
- Background
- Description, SSOC, Step Response
- Frequency Response Experiments
- Modeling Approach
- Comparison of Experimental Results with Model
Data - Conclusions
3Background - System
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                            Figure 1. Schematic
diagram of the Dunlap Plant Spray-Paint Booths
4Background - Block Diagram
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Figure 2. Block diagram of paint booth system
5Background - SSOC
Operating Range for Output
Operating Range for Input
6Background Step Response
7Background Step Response Results
- Experimental results
- K 0.1 0.3 (cm-H2O/)
- t0 0.5 s
- t 1.7 s
- Model results
- K 0.1 0.3 (cm-H2O/)
- t0 0.48 s
- t 1.75 s
8Frequency Response Description
9Frequency Response - Example
T (25.3)
Dc (1.45)
Dm (15)
t (-1.8)
10Frequency Response Bode Plots
K 0.1 cm-H2O/
2nd Order
11Frequency Response Bode Plots
fu0.85 Hz
12Frequency Response Bode Plots
fu0.85
AR.055
13Frequency Response Bode Plots
fu0.85 Hz
14Frequency Response Bode Plots
K 0.21 cm-H2O/
fu0.85
2nd Order
AR.015
15Frequency Response Bode Plots
fu0.85 Hz
16Frequency Response Bode Plots
K 0.35 cm-H2O/
2nd Order
fu0.85
AR.024
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22Modeling Approach
- Approximate FOPDT Model
- Amplitude Ratio Equation
- Phase Angle Equation
23Modeling Approach Bode Plots
24Modeling Approach Bode Plots
25Modeling Approach Bode Plots
26Modeling Approach Bode Plots
27Modeling Approach Bode Plots
28Modeling Approach Bode Plots
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32Results Comparison
- Experimental Results
- K 0.1 0.35(cm-H20/)
- t0 0.6 s
- t 1.7 s
- 2nd Order system
- Ultimate Frequency 0.85 Hz
- Ultimate Controller
- Gain 18.2 55.6 (/cm-H2O)
33Results Comparison
- Model Results
- K 0.1 0.35 (cm-H2O/)
- t0 0.85 s
- t 1.7 s
34Conclusions - System
- 2nd order system
- fu 0.85 Hz
- From the model
- K 0.1 0.35 (cm-H2O/)
- t0 0.85 s
- t 1.7 s
- Kcu 18.2 55.6 (/cm-H2O)