EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
8th Edition
ISBN: 9780176919764
Author: Jeffus
Publisher: VST
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Chapter 16, Problem 5R
To determine
The reason of the erosion of the some tungsten.
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find the laplace transform for the
flowing function
2(1-e)
Ans. F(s)=-
S
12)
k
0
Ans. F(s)=
k
s(1+e)
0 a
2a 3a 4a
13)
2+
Ans. F(s)=
1
s(1+e")
3
14) f(t)=1, 0
Find the solution of the following Differential Equations
Using Laplace Transforms
1) 4y+2y=0.
y(0)=2.
y'(0)=0.
2) y+w²y=0,
(0)=A,
y'(0)=B.
3) +2y-8y 0.
y(0)=1.
y'(0)-8.
4)-2-3y=0,
y(0)=1.
y'(0)=7.
5) y-ky'=0,
y(0)=2,
y'(0)=k.
6) y+ky'-2k²y=0,
y(0)=2,
y'(0) = 2k.
7) '+4y=0,
y(0)=2.8
8) y+y=17 sin(21),
y(0)=-1.
9) y-y-6y=0,
y(0)=6,
y'(0)=13.
10) y=0.
y(0)=4,
y' (0)=0.
11) -4y+4y-0,
y(0)=2.1.
y'(0)=3.9
12) y+2y'+2y=0,
y(0)=1,
y'(0)=-3.
13) +7y+12y=21e".
y(0)=3.5.
y'(0)=-10.
14) "+9y=10e".
y(0)=0,
y'(0)=0.
15) +3y+2.25y=91' +64.
y(0)=1.
y'(0) = 31.5
16)
-6y+5y-29 cos(2t).
y(0)=3.2,
y'(0)=6.2
17) y+2y+2y=0,
y(0)=0.
y'(0)=1.
18) y+2y+17y=0,
y(0)=0.
y'(0)=12.
19) y"-4y+5y=0,
y(0)=1,
y'(0)=2.
20) 9y-6y+y=0,
(0)-3,
y'(0)=1.
21) -2y+10y=0,
y(0)=3,
y'(0)=3.
22) 4y-4y+37y=0,
y(0)=3.
y'(0)=1.5
23) 4y-8y+5y=0,
y(0)=0,
y'(0)=1.
24)
++1.25y-0,
y(0)=1,
y'(0)=-0.5
25) y 2 cos(r).
y(0)=2.
y'(0) = 0.
26)
-4y+3y-0,
y(0)=3,
y(0) 7.
27) y+2y+y=e
y(0)=0.
y'(0)=0.
28) y+2y-3y=10sinh(27),
y(0)=0.
y'(0)=4.
29)…
Auto Controls
A union feedback control system has the following open loop transfer function
where k>0 is a variable proportional gain
i. for K = 1 , derive the exact magnitude and phase expressions of G(jw).
ii) for K = 1 , identify the gaincross-over frequency (Wgc) [where IG(jo))| 1] and phase cross-overfrequency [where <G(jw) = - 180]. You can use MATLAB command "margin" to obtain there quantities.
iii) Calculate gain margin (in dB) and phase margin (in degrees) ·State whether the closed-loop is stable for K = 1 and briefly justify your answer based on the margin . (Gain marginPhase margin)
iv. what happens to the gain margin and Phase margin when you increase the value of K?you
You can use for loop in MATLAB to check that.Helpful matlab commands : if, bode, margin, rlocus
NO COPIED SOLUTIONS
Chapter 16 Solutions
EBK 3I-EBK: WELDING PRINCIPLES & APPLIC
Ch. 16 - What early advancements made the GTA welding...Ch. 16 - What metals were weldable only by the GTAW process...Ch. 16 - Which two of tungsten's properties make it the...Ch. 16 - Why must the tip of the tungsten be hot?Ch. 16 - Prob. 5RCh. 16 - What functions regarding tungsten heat do the...Ch. 16 - What problem can an excessively large tungsten...Ch. 16 - What holds the molten ball of tungsten in place at...Ch. 16 - Using Table 15-1, answer the following: a. What...Ch. 16 - What does adding thorium oxide do for the tungsten...
Ch. 16 - How can the end of a tungsten electrode be shaped?Ch. 16 - Why should a grinding stone that is used for...Ch. 16 - Why should the grinding marks run lengthwise on...Ch. 16 - What are three ways of breaking off the...Ch. 16 - What is the correct color to use on the balled end...Ch. 16 - Why should the torch be as cool as possible?Ch. 16 - What will happen to a water-cooled torch cable if...Ch. 16 - Why must shielding gas hoses not be made from...Ch. 16 - What materials can be used to make nozzles?Ch. 16 - What problem can a long nozzle cause to the...Ch. 16 - Why must the tube of a flow meter be vertical?Ch. 16 - What is the heat distribution with DCEN welding...Ch. 16 - What is the heat distribution with DCEP welding...Ch. 16 - What is the heat distribution with AC welding...Ch. 16 - Why must AC welding power use high frequencies to...Ch. 16 - Why are argon and helium known as inert gases?Ch. 16 - Why is argon's ease of ionization a benefit?Ch. 16 - What makes helium difficult to use for manual...Ch. 16 - What are the benefits of adding hydrogen to argon...Ch. 16 - What is the purpose of a hot start?Ch. 16 - Using Table 16-3, determine the gas post flow time...Ch. 16 - What functions can a remote control provide the...Ch. 16 - Using Table 16-4, determine the minimum gas flow...
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- Auto Controls A union feedback control system has the following open loop transfer function where k>0 is a variable proportional gain i. for K = 1 , derive the exact magnitude and phase expressions of G(jw). ii) for K = 1 , identify the gaincross-over frequency (Wgc) [where IG(jo))| 1] and phase cross-overfrequency [where <G(jw) = - 180]. You can use MATLAB command "margin" to obtain there quantities. iii) Calculate gain margin (in dB) and phase margin (in degrees) ·State whether the closed-loop is stable for K = 1 and briefly justify your answer based on the margin . (Gain marginPhase margin) iv. what happens to the gain margin and Phase margin when you increase the value of K?you You can use for loop in MATLAB to check that.Helpful matlab commands : if, bode, margin, rlocus NO COPIED SOLUTIONSarrow_forwardAuto Controls Hand sketch the root Focus of the following transfer function How many asymptotes are there ?what are the angles of the asymptotes?Does the system remain stable for all values of K NO COPIED SOLUTIONSarrow_forward-400" 150" in Datum 80" 90" -280"arrow_forward
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