Transcript kcide asee 2005 ppt

ASEE 2005
KCIDE
A Knowledge
Capturing
Integrated
Design
Environment
ASEE 2005
ASEE 2005
KCIDE for
Electrical Circuits
• A platform that runs on
top of Windows
• Integrates PSpice,
MATLAB, Excel, Word,
and PowerPoint
• Captures knowledge
ASEE 2005
Based on the Systems
Approach to Problem Solving
• The six step process as
presented in Alexander
and Sadiku
ASEE 2005
Six Steps
• Define
• Present
• Alternate Solutions
ASEE 2005
Six Steps
• Attempt
• Evaluate
• Rework/Export
ASEE 2005
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Electric Circuits IDE
Problem Name: Example 03-02
Date: 6/9/2005
Problem Statement
We are to determine the node voltages in the following circuit. In
addition, we are to find them using nodal analysis.
Define
Your Analysis on the
Problem
We are to solve for the node voltages in the circuit using nodal analysis.
We label the voltages as v1 representing the unknown node voltage at
the top of the current source. The unknown node voltage between the 2ohm and 8-ohm resistors we will label as v2. The unknown node voltage
at the top of the dependent source we will label as v3. Please note that
the number of nodes represent all the nodes excluding the reference
node.
Present
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Number of Nodes in the circuit are 3
Number of Loops in the loops are 3
Let Node Voltage at Node 1 be v1 V
Let Node Voltage at Node 2 be v2 V
Let Node Voltage at Node 3 be v3 V
Let Loop Current in Loop 1 be i1 A
Let Loop Current in Loop 2 be i2 A
Let Loop Current in Loop 3 be i3 A
ALTERNATE SOLUTIONS
The Methods Selected for Solving the Problem are:
Ohms Law
Nodal Analysis(KCL)
The Reasons for Selecting the Methods are:
Stated in problem definition
Attempt
Intermediate steps:
0.75*v1-0.5*v2-0.25*v3=3
-0.5*v1+0.875*v2-0.125*v3=0
0.75*v1-1.125*v2+0.375*v3=0
We could have also included any comments here that could show how
we get the above equations.
ATTEMPT-II
Final Answers:
v1 = 4.8
v2 = 2.4
v3 = -2.4
Evaluate
Comments
We have successfully completed the assignment. The answers obtained
from two different approaches agree. We should also go back to the
circuit and see if the answers make sense. If they do not, my suggestion
would be to try to solve for the loop currents by using mesh analysis and
then solve for the node voltages using the loop currents. Another
approach would be to use the node voltages to determine the branch
currents and see if the satisfy Kirchhoff's current law. Looking at the
original circuit, the answers do make sense.
KCIDE for Circuits
How to download the
KCIDE for Circuits
software from the web
site:
http://kcide.fennresearch.org
IT IS FREE!!!!!!!
ASEE 2005
The Website: http://kcide.fennresearch.org
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