MEEN 364
Fall 07
HW #13
November 26, 2007
Homework #13- Due November 29, 2007 @ 5:00 PM
1) Consider the negative unity feedback system whose open loop transfer function is
given by
G (s)
10
s ( s 1)
Design a lead compensator such that the compensated sys
MEEN 364
Homework # 1
August 30, 2007
Homework #1- Due September 6, 2007 @ 5:00 PM
1) Compute the Fourier series of the following periodic signal
F(t)
1
1
T
T+1
2T+1
SOLUTION: To obtain the Fourier series, we need to calculate the Fourier coefficients.
Th
MEEN 364
Fall 07
Homework #11- Due November 19, 2007 @ 5:00 PM
HW #11
November 8, 2007
MEEN 364
Fall 07
HW #11
November 8, 2007
R
Vin +
_
C
Sketch the asymptotic Bode
plot for the following
transfer function: Sketch
the asymptotic Bode plot
for the follow
MEEN 364
Fall 07
HW #10
November 1, 2007
Homework #10- Due November 8, 2007 @ 5:00 PM
1)
Sketch the asymptotic Bode plot for the following transfer function:
G (s)
100 ( s 4)( s 2 2s 49)
98 ( s 2)( s 2 3s 100)
(Note: Plot the bode magnitude curve for eac
MEEN 364
Fall 07
HW #9
October 25, 2007
Homework #9- Due November 1, 2007 @ 5:00 PM
1) Consider the following negative unity feedback block diagram:
kd
s
MEEN 364
Fall 07
HW #9
October 25, 2007
R
Vin +
_
R(s) +
+
Vc
_
C
+
+
+
kp
_
( s +2)
2
s +5s +4
+
kI
MEEN 364
Fall 07
HW #6
October 4, 2007
Homework #6- Due October 11, 2007 @ 5:00 PM
1) Consider the fluid system shown. Derive the mathematical model for the system and
put them in state-space form. The output is q4.
qi1
h1
C1
q1
q2
R1
R2
h2
h3
C2
R3
C3
qi
MEEN 364
Fall 07
HW #7
October 11, 2007
Homework #7- Due October 18, 2007 @ 5:00 PM
1) A dynamic system is defined by the following state-space equation.
x1 4 3 x1 1
x 1 2 x 0 u (t )
2
2
x1
y 1 1
x2
Obtain the transfer function for the above s
MEEN 364
Fall 07
HW #9
October 25, 2007
Homework #9- Due November 1, 2007 @ 5:00 PM
1) Consider the following negative unity feedback block diagram:
kd
R(s) +
s
+
+
kp
_
+
kI
( s 2)
s 5s 4
Y(s)
2
1
s
It is desired to place the dominant poles of the closed
MEEN 364
Fall 2007
Texas A&M University
Department of Mechanical Engineering
MEEN 364 Dynamic Systems and Controls
EXAM 1 Oct 3, 2007 7 PM 9 PM, RICH 106
Name:
Please circle your section below: Section (Lab Time):
501(M 1:50-4:40 PM)
504(W 1:50-4:40 PM)
5
MEEN 364
FALL 2007
Texas A&M University
Department of Mechanical Engineering
MEEN 364 Dynamic Systems and Controls
EXAM 2 Nov 14, 2007 7 PM 9 PM, RICH 106
Name:
Please circle your section below: Section (Lab Time):
501(M 1:50-4:40 PM)
504(W 1:50-4:40 PM)
MEEN 364
Fall 07
HW #4
September 20, 2007
Homework #3- Due September 27, 2007 @ 5:00 PM
1) Derive the equations of motion and put them in state space form.
I2
r3
r2
3k
4k
b
2
1
3k
3
b
M(t)
4k
r1, I1
r4, I3
The radius and moment of inertia about the center
MEEN 364
Homework # 3
September 13, 2007
Homework #3- Due September 20, 2007 @ 5:00 PM
1) a) Derive the equations of motion for the following system:
k1
I, R, B
k2
x
m
The linear springs have a spring constants k1 and k2. The pulley has a moment of
inerti
MEEN 364
Homework # 2
September 6, 2007
Homework #2- Due September 13, 2007 @ 5:00 PM
1) Compute the Laplace transform of the following functions:
a.) f(t) = t3e-5t
b.) f(t)=e-3tcos(t)
2) Compute the time function given the Laplace transform:
F ( s)
1
s
MEEN 364
Fall 2012
Texas A&M University
Department of Mechanical Engineering
MEEN 364 Dynamic Systems and Controls
EXAM 1 October 3, 2012 7 PM 9 PM, ENPH 202
NOTE: NO CALCULATORS ARE ALLOWED
CLOSED BOOKS AND NOTES
NO CELL PHONES
Name:
Please circle your s
Problem 1 (30 points)
The dynamics of a glider in flight are given by the nonlinear system of differential equations
shown below. V is the gliders velocity, is the angle of attack and D is the constant drag
coefficient.
(1) Find the equilibrium points.
(2
Homework #1 Solutions
Problem 1
Kinematics stage
Number of masses: 2
Number of DOF: 2 (angular displacement of each rod)
Coordinate System: The two angles and the moment is positive counterclockwise
Definitions: The angular displacement of the left and ri
MEEN 360-902 HW #7
Chapter 12, due 10/26/2016 in class
1.
_ Martensitic transformations only occur in the Fe-C system.
_ Age hardening cannot be done at room temperature.
_ Pure metals cannot be age hardened.
_ Tempering is used to regain the ductility of
MEEN 360-902 HW #5
Chapter 10, due 10/12/2016 in class
1. Textbook problem 10-11
2. Textbook problem 10-31
3.
Use the binary phase diagram to answer the following questions:
1. Label the Liquidus and Solidus on the figure above.
2. The composition of the
MEEN 360-902 HW #6
Chapter 11, due 10/19/2016 in class
1.
A. Please identify the eutectic point, the hypereutectic region, and the hypoeutectic region.
B. For an alloy of composition Cu-40% Ag (wt %) cooling slowly from the melt:
1. Sketch the microstruct
Chapter 8: Strain Hardening and
Annealing
Lectures 7 - 8
Fall 2016
Matt Pharr
Have you ever wondered?
Why does bending a copper wire make it
stronger?
How are aluminum beverage cans made?
Why do thermoplastics get stronger when
strained?
What is the d
Chapter 7: Mechanical Properties Part 2
Lectures 5 - 6
Fall 2016
Matt Pharr
Have you ever wondered?
Why glass fibers of different lengths have
different strengths?
Can a material fracture if the applied stress
does not exceed the yield strength?
Why do
MEEN 360-902 HW #4
Chapter 9, due 9/28/2016 in class
1. Describe the major differences between homogeneous and heterogeneous
nucleation and under what conditions each occurs.
2. A 10 cm diameter sphere solidifies in 1000 s. Calculate the time it will take
Chapter 7: Mechanical Properties Part 2
Lectures 5 - 6
Fall 2016
Matt Pharr
Have you ever wondered?
Why glass fibers of different lengths have
different strengths?
Can a material fracture if the applied stress
does not exceed the yield strength?
Why do
Bending Tests
Brittle materials often crack when subjected
to the tensile test. Instead, use the bend test
to test their mechanical properties.
1
3 Point Bending Flexural Strength
My
,
I
3
wh
I
12
Max stress at: y h / 2
Flexural strength for 3-point bend
Chapter 9: Solidification
Lectures 9 - 10
Fall 2016
Matt Pharr
Have you ever wondered?
Does water really freeze at 0C?
Is there a specific melting temperature for an
alloy? Or a thermoplastic material?
What factors determine the strength of a
cast prod
Chapter 6: Mechanical Properties Part 1
Lectures 3 - 4
Fall 2016
Matt Pharr
Have you ever wondered?
Why Silly Putty can be stretched a huge amount
if pulled slowly but very little when pulled
quickly?
Why ceramics are strong in compression but
weak in t
MEEN 360 902
Exam #1 Review
Chapters 6 9
1
Rules
50 mins. Please come 5 - 10 mins early.
8:00 8:50 sharp
Bring calculators.
Use rulers to read charts.
Closed book. No cheat sheet.
You will be provided a formula sheet.
Do not print / bring this sheet.
MEEN 360 902
Materials and Manufacturing Selection
in Design: A Writing Intensive Course
Fall 2016
Lecture 12:
Intro and Review of Fundaments
Matt Pharr
Personal Introduction
B.S. in Mechanical Engineering, 2008, Rice University
B.A. in Materials Science,