P18422: Black Soldier Fly Composting Habitat Improvement
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Subsystem Build & Test

Table of Contents

Team Vision for Subsystem Level Build & Test Phase

During the Subsystem Build and Test Phase, the group planned to deliver the following items:

What We Accomplished:

Electrical Subsystem

Relays

The objective of this experiment was to test the relay and understand the functionalities to ergonomically connect with the system. This experiment was divided into three sections; internal connection testing, low voltage AC testing, and high voltage AC testing.

More information on the tests completed can be found in the Relay Testing Document.

Inverter

The information in the table indicates the various inverters that were compared to make selection. These inverters were compared on the basis of Input/Output voltages, price, wattage restriction, and vendor approval. The total power requirement for the shed system is 2.27kWh/day for heating just the composter and 5.87kW/day for heating the whole shed, which was a major factor in inverter selection but would also result in higher price.

Inverter Research

Inverter Research

Raspberry Pi Code

Raspberry Pi Command Window

Raspberry Pi Command Window

During this phase, code was researched in order to connect the sensors to the Raspberry Pi. Thanks to a few searches online, code for the same class of sensors was found and used to obtain working sensor data. The data will be verified with known accurate sensors in the lab before moving forward.

The next step is to complete the code that would input the sensor data into a spreadsheet for easy removal when needed. Once complete, code will be written to implement the use of the CO2 sensor. The final step needed for the software portion is to combine all pieces and run the system from startup of the Raspberry Pi and continuously on a timed cycle.

CAD System

System Architecture

System Architecture

The systems architecture was updated to contain the items previously overlooked that are now contained in the updated design or in the shed.

Model

Model

The CAD for the composter system is almost completed. During the last phase:

CAD Update Document

Left to Do

Process Improvements

The following document provides suggestions for process improvements relative to the work completed by an operator interfacing with the entire composting system. Major changes were made and have been noted in the figure below:
Process Improvement Updates

Process Improvement Updates

Manufacturing

Manufacturing Timeline

Manufacturing Timeline

Manufacturing Updates

Manufacturing Updates

Last phase we made progress in getting one part milled: 005-02. This part is shown in an above photo. Looking at our manufacturing plan, we are currently behind schedule in building the composter.

Construct: Next phase, the large HDPE pieces that make up the main body and lid of the composter will be manufactured by the Construct on campus. This will save us time and help catch us back up on schedule. It was also ensure that these large pieces are done with high precision and accuracy.

Next Week: Next week, Melissa and Ian will get together and work to update the manufacturing plan with all the new parts to get a better picture of when exactly everything will get done. They will also work to get a part ready for the construct.

Assembly Plan: This phase we created a template for our assembly plan. Once we have manufactured a few more parts we will work to start filling in this document. See this document for more information Assembly Manual

Test Plans

Test Plan Tracker

Test Plan Tracker

Test Plan Document

We have finished all preliminary tests scheduled for phase 2 completion. As shown in the tracker above, all tests showed preliminary meeting the desired requirements. These tests will be reiterated again in the following phases to ensure this continues to be true on the real system.

Problem Tracking

The group's problem tracking document has been updated to include the newest happenings related to obstacles in the project's progression. Most notably, the issues faced by the electrical sub-team have been resolved. This will allow the electrical team to continue with sensor validation and further delivery of other items. In addition to this breakthrough, the project has experienced two new problems. New considerations can be seen and expanded upon below in the updated document:
Problem Tracker

Problem Tracker

Risk Management

The team reviewed and updated the cumulative risk assessment that was first created in the Problem Definition phase of the project (and has been updated during every project phase thus far). Changes have been witnessed on several fronts but will not be updated until the full impact of these risk changes can be understood by the team administration.
Risk Matrix

Risk Matrix

As this phase progressed, it became aware to the group that risk RRS4 (running out of time on the project) has been lowered in terms of impact value. RRS6 (budgetary limitations) has also been included for consideration at this time--even though its impact has not yet changed--due to the fact that it will in fact decrease moving forward. This is the result of the group gaining funding from IEEE. Please see the above table for the most up-to-date risk considerations. The figure below is meant to be a visual representation of these aforementioned changes:
Risk Updates

Risk Updates

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Budget

During this phase it was announced that our team would be receiving $500 in additional funding from IEEE which brought our overall budget to spend to $1,850 from $1,350.

We have purchased 22.4% of our overall budget thus far and it was determined that some items highlighted in red on the image would need to be purchased additionally. In addition we have not accounted for the consumable item that will need to be purchased such as epoxy and spray foam and we will need to purchase a power meter.

Budget Maintenance

Budget Maintenance

BOM/Purchase Plan

During this phase the following items were purchased:

The items with their Date requested highlighted in red are currently behind schedule and will need to be purchased at the beginning of next phase.

Purchase Plan

Purchase Plan

Plans for next phase

The Cost Analysis document was a first pass at assessing the opportunity of requesting access to power via FMS. Further work needs to be done (such as meeting with potential donor sources) in order to better understand how to move forward with the project.

During the Integrated System Build and Test Phase, the group will deliver the following items:

The overall work breakdown plan (WBS) for the Integrated System Build and Test Phase can be found below. The WBS of who is planning on working on specific tasks is highlighted in the individual visions section below.

Project Plan

Project Plan

Please find the Team Visions in the Team Vision Document.


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