DeGarmos Materials and Processes in
January 30, 2017
Factors to consider for castings
Desired dimensional accuracy
Number of castings
Type of pattern and core
1. Find the time function of the following Laplace transform using partial fraction expansion:
F (s) =
3s 2 + 9 s + 12
( s + 2)( s 2 + 5s + 11)
2. If the Laplace transform in problem 1 represents the transfer function of a system, what is the
unit step re
Linearize the following equation, given X = X1 when = 1?
X X 3 sin
Let X = X1 + x and = 1 + , where x and < 1.
X3 = (X1 + x)3 = X13 + 3X12x + 3X1x2 + x3 X13 + 3X12x. and sin = sin( 1 + ) = sin 1cos +
cos 1sin sin 1 + (cos 1)
Summary of the Root Locus
Root locus gives us the information of the closed-loop poles for a certain value of the design
parameter K. The closed-loop poles locations give us the stability and (together with the closedloop zeros) performance of the system.
In choked flow, mass flow rate is maximized.
The rocket's nozzle is designed to be efficient at altitudes above sea level, and, at
engine start, the flow is over-expanded, that is, the exhaust gas pressure, pe, is
higher than the supersonic isentropic exi
95:A (M5e 4463;)
db WAS 19: he. (Ski-ca
. =$mu4g73 f
530(2 Lo+ #7:); % sing; .1! 2.- C'
8" 53 an T Q": r!"
H 3 _ .1. 2.
mm, m (33% (9" c s cps Q.
' CO 1.- 3
UL : 0L COS l" CCbSKL/L FEF iii(1r- 50-. c, 510 who)
? - GI bar-1n " "'"
. RLL+ Cnsille. GP
Ve," I2 OPT;- (j-)
GP: cfw_gtl E. R: 8-3li haul-h
_k_-|_ m I" "0 95 spends: head-5
- 39.) k k: g
I op: 32 oil-vi-
Vc" ZoooTrg L T. [lE. 5?]
rh-Tpt 1494: 1'- Ms J. mic. 4- aunt.- b m by
Now-1:. star. un min-m. ab cthn'bn.