P17316: Light Rail

Systems Design

Table of Contents

Summarized below is the systems design process for the Light Rail Project (P17316).

For additional content from this module, see the Systems Level Design Documents directory.

Team Vision for System-Level Design Phase

The team's goals for this phase were as follows:

The team accomplished all goals

Updates from Phase 1: Problem Definition

Throughout this phase the team has gained more refined understanding of the project's direction. Updates to the first phase include

Click the links above to view updated documents. Also see the Problem Definition page to see these changes reflected on Edge.

Updated Engineering Requirements

The engineering requirements were edited and presented in imperial units which are more appropriate for the scope of the project, baseball.
Updated Engineering Requirements

Link to full Engineering Requirements document.

Document Owner: Rachael Stroebel

Functional Decomposition

Document Owner: David Pyenson


The main benchmarking comparison for this project is with the existing system Dr. Edmunds is currently using. Below is the table comparing the existing Speed-Trac with the selected concept for the Light Rail.

public/Photo Gallery/BenchmarkingTable.JPG

The features of the device and a picture of the existing system are shown below.

public/Photo Gallery/DataSheet.jpg

Document Owner: Jeff Jaskier

Click here for full document.

Feasibility: Prototyping, Analysis, Simulation

Cost and power feasibility were considered in the calculations shown below.

public/Photo Gallery/Feasibility.JPG

Given a budget of $350 we have concluded that the project is possible given the cost of potential materials.

The maximum length of 20 feet of LED strip with 3 LEDs per foot with a 5V supply rail would need 15 watts of power. With an additional 15% overhead, we would need 17.25 watts. This would imply that every LED is powered at the same time; however, this is not the case. Only a few LEDs will be on at a given moment, so there will be no power restrictions involved.

Morphological Chart and Concept Selection


Morphological Chart for Light Rail Design

Document Owner: Rachael Stroebel

Concept Development

public/Photo Gallery/PughChart1.JPG

Second iteration of concept development.

public/Photo Gallery/PughChart2.JPG

See Pugh Chart for details.

Concept Selection

Below is the selected concept.

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The concept was selected based on the Pugh charts shown above in concept development. Several potential concepts were weighed against the selection criteria. A more detailed description of the criteria is shown below.

Updated Engineering Requirements

Below are sketches of three concepts generated during this design phase.

public/Photo Gallery/Concept1.JPG

First Concept

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Second Concept

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Third Concept

Click here for document with all sketches.

Document Owner: Jeff Jaskier

Systems Architecture

public/Systems Level Design Documents/Flow Down Charts.jpg

Document Owner: David Pyenson

Designs and Flowcharts

public/Photo Gallery/Light Rail Chart 1.1.jpg

Updated Risk Management

Below are the more specific risk updates for the Risk Management document based on the concept selected during this phase. For the full document please click here.

public/Photo Gallery/RiskManagementConcept.JPG

Plans for next phase

Below is the gant chart we are using to set goals for our next phase.

public/Photo Gallery/PlansforPhase3.JPG

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