P15662: Linearly Reciprocating
Friction Tester
Armature Subsystem: Reba Conway, Kolby Irving, Chris Karamanos, Eric Kutil, Emeka Okoye
Base Subsystem: Sean Cummings, Ethan Hanson, Matt Lebowitz, Tyler Nigolian, Alexandra
Woodward
Agenda
 Project Overview
 Constraints
 Engineering Requirements
 Customer Requirements
Project Overview
Constraints
Constraint
Was it met?
Customer Requirements
Customer
Importance Description
Reqt #
Requirement Met?
C1
9
Interface between Armature (P15660) and Reciprocating Base (P15661)
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
3
3
3
1
User and repair manual included
System is safe to be around when running
All data in SI units
Physical size fits on desktop
Ease of use
Accommodate ball/pin contact holder
Contact Holder to be removable and interchangeable
Range of normal force applied to contact
Zero resting force of armature (load release)
Continuous force by voice coil
Base does not deform under applied normal load
Base accepts variable sized specimen
Device will accommodate both dry and lubricated specimen tests
Variable stroke
Variable frequency
Test rig must remain stationary during operation
Data acquisition system integrates with LabVIEW
Contact Holder to be easily adjustable
Device reliable for long test durations
Variety of precision weights
meets requirement
meets minimum requirement
does not meet requirement
Engineering Requirements (System)
Eng Reqt
#
Source Engineering Requirement (metric)
ER1
C1
ER2
ER3
ER4
ER5
ER6
ER7
ER8
ER9
ER10
ER11
ER12
ER13
C3
C3
C5
C20
C6
C9, C12
C10
C13
C13
C11
C15
C16
ER14
C7
Actual
PASS/FAIL
PASS
PASS
System Safety
Fail Safe
System not too large
Test duration
Base is easy to clean
Testing load range
Zero Resting Force of Armature
Specimen diameter
Specimen thickness
Minimize weight of holder
Stroke
Frequency
PASS/FAIL
PASS/FAIL
feet
hours
seconds
N
N
mm
mm
kg
mm
Hz
PASS
PASS
4x6
0.1-10
60
0.01
0.5
-
PASS
PASS
2x1
24
45
0.5-20
0
20-50
5-25
0.25
2-10 +/- 0.5
1-10 +/- 0.5
46
PASS
0.0001962
19.41 - 53.27
PASS
0.285
PASS
PASS
N
30
>30
50.56
mm
30
>30
47.22
Minutes
2
<2
0.67
mm
mm
PASS/FAIL
PASS/FAIL
35
35
PASS
PASS
>>35
>>35
PASS
PASS
27
49
Secure Ball/Pin Holder and Resist Slippage
C1, C6, C19 Adjustablity in the Z-axis
ER16
C6, C8, C19 Ball/Pin Easily Adjustable and Interchangeable
C1, C6
C1, C6
C4, C18
C18
Marginal
Ideal Value
Value
Base and armature use the same interface
ER15
ER17
ER18
ER19
ER20
Units
Adjustablity in the X-axis
Adjustablity in the Y-axis
Record Frictional Force
Data Acquisition works with LabView
meets requirement
meets minimum requirement
does not meet requirement
PASS
2x1.04x1.05
Project Deliverables
 Completed reciprocating friction tester
 Complete documentation package
 Drawings
 Process sheets
 Test plans
 Test data validating conformance to requirements
 Maintenance and operation manual
Final Product – need to label other major parts, label x + y axis
counterbalance
strain gauges
voice coil
Final Product - need to label major parts, label x + y axis
Test Results
Project Status
Major Issues