Table of Contents
Sub-Systems DesignCritical Sub-Systems are outlined below. For each sub-system, alternatives must be considered, feasibility must be shown, requirements must flow down to the subsystems, and next level functional decompositions must be made.
Inputs / Outputs
Programmable Logic Controller
Controller Functional Decomposition
Analysis Software (To be run on PC)
Analysis Software Functional Decomposition
Analysis Software Pugh ChartFor determining programming language for implementation.
|Feature||Excel macro||Application Programming Language (e.g. Java)||Scripting Language|
|Ease of maintenance||Datum||-||-|
|Ease of adding functionality||Datum||Same||Same|
Sample Analysis Software GUI
PC Communication Pugh ChartFor determining method of communicating data to a PC.
|Ease of Implementation||Datum||-||-|
Enclosure Functional Decompositionhere
Enclosure Heat TransferTo determine whether or not cooling is necessary inside the enclosure, the inside temperature must be determined. The first level temperature analysis can be seen below.
Note: The next step in the heat calculations is to determine more precise convection coefficients, the current values (2 W/m^2*K) are worst case and may not be an accurate portrayal. The Heat Generated needs to also be finalized based upon the Power Supply that will be selected. Based upon this first level analysis, some sort of cooling needs to be provided.