P18104: High Altitude Balloon Instrumentation Package
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Subsystem Build & Test

Table of Contents

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Project Recap

The High Altitude Balloon Instrumentation Platform (HABIP) is a multi-functional system that allows users to collect and analyze data from near-space experiments. The device records internal data, and also telemeters data that has been gathered from an array of sensors to a ground communications center. The goal of this project is to create the aforementioned array in a configuration that is lightweight, cheap to manufacture, and highly reliable. The final product will undergo a mission lasting for several hours in harsh conditions, and will parachute back to Earth from an altitude of over 100,000 feet to be recovered and analyzed. This project seeks to improve upon the progress of two former MSD groups: P17104 and P17105, and is intended to be a design which can be further improved in the future.

Team Vision for Subsystem Level Build & Test Phase

During this phase, the team worked to test the individual subsystems and ensure that they are ready to be integrated into the final system. Many steps were also taken to ensure a high probability of success in a single launch attempt.

Test Results Summary

APRS

APRS Location

APRS Location

Decoded APRS Data

Decoded APRS Data

The APRS was tested for 4 hours. Though the physical location was not varied for this test, the changes in pressure, relative humidity, and temperature were logged for over 200 samples. The data was decoded in Excel. To view the full document, click here.

IMU/Reaction Wheel

Reaction Wheel Motor Response to IMU

Reaction Wheel Motor Response to IMU

The reaction wheel was tested to ensure proper response to motion detected by the IMU gyro. The input and response are shown, with minimal delay between detection of angular velocity and correction by the reaction wheel. Proportional amplitude of response will be assigned once final weight is established.

DACQS

Temperature Graph

Temperature Graph

Pressure Graph

Pressure Graph

Humidity Graph

Humidity Graph

Altitude Graph

Altitude Graph

The Raspberry Pi Zeros being used for Data Acquisitions were tested to ensure that all sensors were operational and that data could be written. Some calibration still may be necessary, but reasonable readings of the above metrics were taken while performing simple tests to vary measurement environment.

Thermal Model (Demo)

Simscape Thermal Model

Simscape Thermal Model

The thermal modeling technique is described below:

Subsystem Updates

Teensy Software

Timing Table

Timing Table

Functional Updates:

Main Board

Unpopulated Main Board

Unpopulated Main Board

DTV

Ground Station

Frame Assembly

Assembly with Mounted GRSS and Cameras

Assembly with Mounted GRSS and Cameras

Budget Tracking

Summary of Purchases to Date

Summary of Purchases to Date

As of now we have spent $1308.04, with $191.96 remaining in our budget.

Risk and Problem Tracking

Risk Mitigation Plan
Pre-amp does not arrive in time Find new supplier before final week of March
Errors in PCBs are not solvable Spend remaining budget on final iteration PCBs
Remaining funds are inadequate Limit future purchases to exclusively “must-haves”
Problem Adaptation to Resolve
Switch to ethernet networking for DTV has set this subsystem back Diverting ME resources to contribute heavily to getting back on track
Minor errors exist in PCB Manual board modifications to resolve
Lacking complete understanding of ground station software Continued communication with previous users
Significant time overruns in scheduled tasks Assigning shorter timelines and building in buffers, reassigning resources as strengths become apparent

National Engineers Week Conference

Conference Poster

Conference Poster

We are excited to have had representation for the team and for RIT at Boeing’s conference. Above is the poster that was used for this presentation.

Plans for Next Phase

Gantt Chart

Sample of Gantt Chart

Sample of Gantt Chart

To view the full document, click here.

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