PMAD System Technology Development

1
KCIDE A Major Research Project with NASA-Glenn
2
KCIDE

• A Knowledge Capturing Integrated Design
  Environment

3
A Knowledge Capturing Design Environment for a
Course in Electrical Circuits
4
KCIDE for Electrical Circuits

• A platform that runs on top of Windows
• Integrates PSpice, MATLAB, Excel, Word, and
  PowerPoint
• Captures knowledge

5
Based on the Systems Approach to Problem Solving

• The six step process as presented in Alexander
  and Sadiku

6
Six Steps

• Define
• Present
• Alternate Solutions

7
Six Steps

• Attempt
• Evaluate
• Rework/Export

8
(No Transcript)
9
(No Transcript)
10
(No Transcript)
11
(No Transcript)
12
(No Transcript)
13
(No Transcript)
14
(No Transcript)
15
(No Transcript)
16
(No Transcript)
17
(No Transcript)
18
(No Transcript)
19
(No Transcript)
20
(No Transcript)
21
(No Transcript)
22
(No Transcript)
23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
29
(No Transcript)
30
(No Transcript)
31
(No Transcript)
32
Electric Circuits IDE
Problem Name Example 03-02 Date 6/9/2005
33
Problem Statement
We are to determine the node voltages in the
following circuit. In addition, we are to find
them using nodal analysis.
34
Define
35
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 2-ohm 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.
36
Present

• 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

37
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
38
Attempt
Intermediate steps 0.75v1-0.5v2-0.25v33 -0.5
v10.875v2-0.125v30 0.75v1-1.125v20.375v3
0 We could have also included any comments here
that could show how we get the above equations.
39
ATTEMPT-II
Final Answers v1 4.8 v2 2.4 v3 -2.4
40
Evaluate
41
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.
42
KCIDE for Circuits

• How to download the KCIDE for Circuits software
  from the web site http//kcide.fennresearch.org
• IT IS FREE!!!!!!!

43
The Website http//kcide.fennresearch.org
44
http//kcide.fennresearch.org/downloads.htm
Click Here
45
Click Here
46
Fill out the form and click Submit
47
After a short while, you will receive an email
with download instructions.
Click on the link to complete the go to finish
the downloads process.