P17104: HABIP-COMMS
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Subsystem Build & Test

Table of Contents

Team Vision for Subsystem Level Build & Test Phase

Summarize: Since our last design review, we have worked on the structure and our custom PCB. We have finished the custom PCB component placement and layout; it has also been reviewed. We are going to order the board and components.

We have also done more testing. The OSD module has been controlled with the Rasperry Pi. We have received 2m transmissions from the Pi with the METEOR Lab equipment. The Pi has received APRS packets. We have tested the 2m transceiver subsystem (prototyped) and the 70cm ATV transmitter subsystem together with the diplexer and antenna.

Since the last update the metal side structure has begun being machining, and roughly will be complete by end of week 6. The current model will be the primary system testing platform for the upcoming reviews. As such an order will be placed for secondary materials that will constitute the flight ready platform. See mechanical side tab for further details.

Custom PCB Update

We have finished designing our custom PCB. We will be ordering the board and components.

The updated schematic can be found here: Main COMMS Board Schematic

The updated custom PCB BOM can be found here: Main COMMS Board BOM

Here are some images of the layout:

Custom PCB Layout

Custom PCB Layout

Custom PCB Layout - Top

Custom PCB Layout - Top

Custom PCB Layout - Bottom

Custom PCB Layout - Bottom

Here is a view of the panel gerbers (two copies of the board):

Custom PCB Panel

Custom PCB Panel

2/28/17 Update:

We have ordered a panel from Advanced Circuits with 2 copies of the board on it.

Our gerbers can be found here: zipped gerbers

Their generated plots can be found here: Advanced Circuits Plots

Mechanical Side Update

Cage Manufacturing Status

Cage Manufacturing Status

As stated previously, the current version of the cage will be primarily a test system, namely for the reaction wheel. The following highlights current aspects of the cage divided by part:

Final manufacturing of the polyethylene layers has not begun as components are being finalized and the layers themselves are more so integration functioning. Aside from that the two component mounting methods have been finalized as such:

Test Results Summary

See the test plans on the Build & Test Prep page.

We have performed the following testing:

Risk and Problem Tracking

Risk Management

Risk Management

Risk Management

The updated working document can be found here.

Problem Tracking

Here is our updated problem tracking table:
Problem Tracking Table

Problem Tracking Table

Here is a pie chart with our updated progress on these problems:

Problem Tracking Wheel

Problem Tracking Wheel

The updated working document can be found here.

Plans for Next Phase

Team Plans

 Gantt Chart for Next Phase

Gantt Chart for Next Phase

Our Gantt chart working document can be found here: MSD II Gantt Chart

A list of team tasks for the next phase can be found here.

Individual Plans


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