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Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
3.5 Analysis and Design II
Dr. Tarek A. Tutunji
Philadelphia University
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Preview In the previous sequence, the 4th step in the design
process, Study Solutions was presented.
In this sequence, the 5th step: Analysis and Design of the chosen solution will be presented.
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Seven Design Steps1. Define the Problem2. Gather Information3. Propose Solutions4. Study the Solutions
5. Analyze and Design the chosen solution
6. Implement the Design7. Evaluate Performance
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Design Design should include
Drawings and Schematics
Math Models
Simulation Results
Report
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Circuit Diagrams
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Mechanical Drawings
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Mathematical Models
MassForce
Spring
Damper
dt
dxc-kx-Fma
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Mathematical ModelsR
V+
-
L C
+ VR - + VL -+ Vc -
i
idtC
1
dt
diLRiV
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Simulations Tools
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Simulation Tools
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Simulation Tools
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Example: Sorting Boxes Sort boxes, according to their sizes automatically, on a production line
Box
Sensor
Actuator 1 Actuator 2
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Sensors
Box ABox B
Transmitters Receivers
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Actuator DC Motor Specifications
Voltage: 12 V
Current: 5 Ampere
Speed: 1,000 RPM
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Start
Both Lights Off?
Delay
Delay
Motor On
Read Lights
Open Arm 1
Open Arm 2
Close Arm 1
Close Arm 2
No
Yes
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Schematic for the DC Motor
Vin
R Li
+
- Motor
T
w
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
DC Motor Modeling The electrical and mechanical equations
/LωkRiVdt
diωk
dt
diLRiV einein
FmFmmFFmm JJ/)ωb(bikdt
dωωb
dt
dωJωb
dt
dωJT
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Motor Simulation
1/(Ls+R) 1/(Js+b)k2
k1
+ +Vin
Tload
w
-
-
Ti
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Simulation: Motor Response
Dr. Tarek A. TutunjiEngineering Skills, Philadelphia University
Conclusion Design can be divided into seven-steps
The 5th step, Analysis and Design, was described in this sequence