cfw_9/4 W D: %H Sela-H 0n 0%; OF 2/
I'M/049(9ch gdlows W ?4*H\ /Lauw wi-HA
~11 LUMLEA COMS'H/Mf CPCLJ Va.
J
\wtl
_ v . 44" X cfw_t7 (cmPoMM+$ 030%; wbci+7
0M 7 1nger cm W curvi
wmw 9% 1cm Jed/.mAw/s a4: m
?09I'I'-" ef/u'h' amA-vdak [/7 l/
I I
x\(A/\ 3m lu

Midterm II 0101 ENES 221 Spring 2013
Name: _ 7 Section
1. [33 points] The small object is placed on the inner
surface of the conical dish at the radius shown. The
coefcient of static friction between the object and
the conical surface is 0.30. Find the ma

Exercises I9
Another form of energy called potential energy ot'a system is addressed
in lIIZhapter 2. Specic examples are not provided here, but the use of kinetic
energy and work done in developing mathematical models of vibratory sys-
tems is illustrate

Name:_
Section:_
ENES 221
Midterm 2a
Problem 1:
_
Problem 2:
_
Problem 3:
_
Total:
_
As part of the academic integrity code practiced at the University of
Maryland, please copy the statement below on the space provided, and
sign and date the statement at

Homework #5 Solution
4.2 A load of mass m is suspended by an elastic cable from the mid-span of a beam, which is held fixed at one
end and is free at the other end, as shown in Figure E4.2. The beam has a length Lb of 4 m and a flexural
stiffness EI = 60

ENME 361: Vibrations, controls and optimization I
February 19, 2015
Homework#3:
Problem3.8
Determine the equation governing the sysetem studied in Example 3.15 by carrying out a
force balance.
Solution
The free body diagrams are show below.
The force bala

Solutions to Exercises
Chapter 2
Section 2.1
2.3 Consider the crank-mechanism system shown in Figure E2.3. Determine the rotary
inertia of this system about the point O and express it as a function of the angular
displacement . The disc has a rotary inert

ENME 361 - Spring 2015
ENME 361 VIBRATION, CONTROLS AND OPTIMIZATION I (Spring 2015)
SYLLABUS
Instructor (0101):
Telephone:
E-Mail:
Office:
Office Hours:
Prof. Miao Yu
301-405-3591
mmyu@umd.edu
EGR 2108
Tu and Th (11:00 am to 12:30 pm), or by appointment

ENME361: Vibrations, Controls and Optimization I
Solutions for ENME361 HW 1
Fall 2013
1.6 Consider the pendulum of mass m attached to a moving pivot shown in Figure E1.6. Assume
that the pivot point cannot translate in the vertical direction. If the horiz

Spring 2015
Due at 9:30 A.M., April 14, 2015
ENME361: Assignment No. 6
1
2
5
6
5.16 A rotating piece of machinery runs intermittently. When it is operating, it is rotating at
4200 rpm. The mass of the machine is 100 kg, and it is supported by an elastic s

_l_Z :Z Sch/[16mm
A V Gum/x3 Z (any/13:53, an "ii/5*
cfw_.0 f3] 604 4rmlm] wVW pul \MVg
l- A a HP.
>< , gar A! Await/wk; [GA/1
:WC\'\A\ 14?rbac\'~ IBCQofm/st Car A "Ah; 0U\A 0? U'AL \"L 9+qu [LJAHE (av
a comuffiiy _0_(*:EFILMQJHUV\ wc (A $ B mag/AWV

ENME 400 Exam:
General Material Properties: Carbon steel alloys have E=30,000 ksi (207 GPa), =0.292, and G=11,500
ksi (79.3 GPa), and aluminum alloys have E=10,400 ksi (71.7 GPa), =0.333, and G=3900 ksi (26.9 GPa)
1. A cylindrical pressure vessel has an e

Name:
1.
Little Billy is standing on a 1Om high diving board holding a water balloon full of ice water. His ister is
swimming 3m below the surface of the water. Billy wishes to burst this ice water balloon on his ister, but in
order to do so it must impac

ENME 361 - Spring 2015
ENME 361 VIBRATION, CONTROLS AND OPTIMIZATION I (Spring 2015)
SYLLABUS
Instructor (0101):
Telephone:
E-Mail:
Office:
Office Hours:
Prof. Miao Yu
301-405-3591
mmyu@umd.edu
EGR 2108
Tu and Th (11:00 am to 12:30 pm), or by appointment

To be solved in groups:
A 40 kg block A is sitting on top of an 80 kg block B. Block A has a massless pulley attached to it and the
cord is subject to a force of P=lSON. The coefficient of friction between the blocks are 5 = 0.5 and
k=0.3, and block B is

Useful equations
Logarithmic Decrement:
1 x t
2
ln
p x t pTd
1 2
Free oscillation response:
(i)
Underdamped Systems:
x t A0 e nt sin d t d
2
V n X 0
A0 X 0
,
d
d tan 1
2
0
(ii)
Critically Damped Systems:
(iii)
Overdamped Systems:
d X 0
V0 n X 0
x

Midterm 1a
ENES 221
Name:_
Section_
Problem 1:
_
Problem 2:
_
Problem 3:
_
Total:
_
As part of the academic integrity code practiced at the University of
Maryland, please copy the statement below on the space provided, and
sign and date the statement at t

TABLE 2.2 Mass moments of inertia about axis z normal
to the x-y plane and passing through the center of mass.
L
Slender bar
L/2
z
JG
1
mL2
12
JG
1
mR 2
2
JG
2
mR 2
5
R
Circular disk
z
R
Sphere
z
TABLE 2.3 Spring constants for some common elastic eleme

Midterm2Reviewproblems
Problem Q1: The drum A is given a constant angular acceleration 0 of 3 rad/s2 and
causes the 70-kg spool B to roll on the horizontal surface by means of a massless
connecting cable, which wraps around the inner hub of the spool. The

.n-aai
The analysis of planetary gearing often is unwieldy because components
can be connected in various combinations of drive inputs and outputs.
Moreover, the planet gears rotate about a moving axis. To simplity matters. a
governing kinematic equatio

LAB 3: DISPLAYING DATA WITH PROCESSING
Objectives
The purpose of this lab is to introduce fundamental concepts in Arduino hardware and software
development, and interfacing between Arduino and the Processing environment for graphical
display of data. In t

Lab 2:
Dissection and Benchmarking
I pledge on my honor that I have not given or received any unauthorized assistance on this
assignment.
Tae Lee
_
Gary McKee
_
Amanda McCourt
_
Luke Travisano
_ _
1
Table of Contents
1
2
3
4
Subsystems
1.1 Motor, Electron

Material adapted from:
Arduino Sketches a Tutorial
Jenn Pinciotti
Prof. R.D. Gomez
Alireza Safi
Chris Shiffler
ACTIVITY 1: Blink
Activity 1: Basic Blink
You will need:
1 Arduino UNO
1 LED
1 approx. 300 resistor
1 USB cord
You will learn:
How to compi

ENME 351
Electronics and Instrumentation II
Homework 4: ADCs, Sampling, and Aliasing
Due Thursday, Sept 29 by 11:59PM as a single PDF or images to Gradescope
*Include your name and date on each assignment and draw a box around your answers.
1.

1)Wind turbine blades
Material requirements:
High strength
High fatigue resistance
Light weight
Stiff
Material used:
Glass fiber: Long fibers along the lengths can undergo high tensile stress which makes the blade
resistant to back and forth m

ENME 351
Electronics and Instrumentation II
Homework 2: Introduction to Arduino
Due Thursday, Sept 15 by 11:59PM as a single PDF or images to Gradescope
*Include your name and date on each assignment and draw a box around your answers.
1. Provi

ENME 351
Electronics and Instrumentation II
Homework 5: Signals in time and frequency domain
Due Thursday, Oct 6 by 11:59PM as a single PDF or images to Gradescope
*Include your name and date on each assignment and draw a box around your answers.

LAB 4: SAVING AND NORMALIZING DATA
OBJECTIVES
The purpose of this lab is to learn the following skills.
Using the Arduino to acquire data.
More advanced Processing coding, including writing out values to a file.
Normalizing data.
In this lab you will meas

LAB 6: SAMPLING AND ALIASING
Objectives
This lab explores the impact of sampling rate on the digital representation of a sampled waveform.
Specifically, we are interested in investigating the relationships between signal frequency, sample
rate, Nyquist fr

ENME 351
Electronics and Instrumentation II
Homework 3: Timers, Processing, and Analog Intro
Due Thursday, Sept 22 by 11:59PM as a single PDF or images to Gradescope
*Include your name and date on each assignment and draw a box around your answers.