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High Altitude Photography Platform

About
Our story
Team
Acknowledgement
Contact
Tech
Overview
Electronics
Structure
RCS
ELS
Balloon
Software & App
Operations
Missions
Gallery
Blog
Support
How To Help
Join
Social
Tracking App
Store
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HAPP Blog

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HAPP Research
May 28, 2016

Dynamic Test Fire: Jet Force

HAPP Research
May 28, 2016
Dynamic Test Fire: Jet Force

Finding the relationship between jet force and manifold pressure in the RCS based on dynamic tests

Tagged: HAPP, RCS, jet, force, dynamic, dynamic test fire

Comment
HAPP Research
May 27, 2016

Who Are My Readers?

HAPP Research
May 27, 2016
Who Are My Readers?

Geographical breakdown of blog readers after the first 10,000 visitors

Tagged: HAPP, blog, readers, social

1 Comment
HAPP Research
May 26, 2016

Two Methods to Measure MOI

HAPP Research
May 26, 2016
Two Methods to Measure MOI

Comparing two methods to measure moment of inertia: Quick and dirty with rubber bands, and more high tech with the trifilar pendulum. Which method will win?

Tagged: RCS, HAPP, MOI, moment, trifilar, pendulum

Comment
HAPP Research
May 16, 2016

Trifilar Pendulum for MOI

HAPP Research
May 16, 2016
Trifilar Pendulum for MOI

Constructing and using a trifilar pendulum to accurately find the moment of inertia of a prototype RCS system

Tagged: HAPP, RCS, pendulum, trifilar, MOI, inertia tensor

2 Comments
HAPP Research
May 10, 2016

Static Test Fire: Results and Limitations

HAPP Research
May 10, 2016
Static Test Fire: Results and Limitations

Results from first static test firing of RCS components and the failure of my first method to measure jet force

Tagged: HAPP, RCS, static, static test fire, pneumatics

Comment
HAPP Research
May 9, 2016

Using Arduino for Data Collection

HAPP Research
May 9, 2016
Using Arduino for Data Collection

Exploring the speed an accuracy of using an Arduino as a device for collecting lab data during static test firing of RCS components

Tagged: HAPP, Arduino, static, static test fire, RCS

Comment
HAPP Research
May 8, 2016

Static Test Fire: Instrumentation

HAPP Research
May 8, 2016
Static Test Fire: Instrumentation

First bench tests for the RCS pneumatic system and 3D-printed nozzles

Tagged: HAPP, test, static test fire, RCS, pneumatics

Comment
HAPP Research
May 6, 2016

Inspiration

HAPP Research
May 6, 2016

Some aerial photography not taken with the HAPP... as inspiration and motivation for this project

Tagged: photography, inspiration

Comment
HAPP Research
May 6, 2016

Valves and Pneumatics

HAPP Research
May 6, 2016
Valves and Pneumatics

Selection of the high speed, lightweight valves that form the heart of the RCS

Tagged: HAPP, valves, pneumatics, RCS

4 Comments
HAPP Research
May 4, 2016

Nozzles: Theory and Design

HAPP Research
May 4, 2016
Nozzles: Theory and Design

A walk through the thermodynamics and other design considerations as I iterated to find the right nozzle design for the 3D-printed RCS jets

Tagged: HAPP, nozzles, jets, RCS, 3D printing, thermodynamics

Comment
HAPP Research
April 30, 2016

Controls: Implementation

HAPP Research
April 30, 2016
Controls: Implementation

Implementing the RCS stabilization controller in software and hardware

Tagged: controls, implementation, HAPP, RCS, software, stabilization

Comment
HAPP Research
April 27, 2016

Controls: Simulation

HAPP Research
April 27, 2016
Controls: Simulation

Building a virtual model of the HAPP in Simulink and verifying the stabilization algorithm

Tagged: HAPP, controls, simulation, MATLAB, Simulink, RCS, stabilization

Comment
HAPP Research
April 25, 2016

Controls: General Strategy

HAPP Research
April 25, 2016
Controls: General Strategy

Basic approach to building the autopilot controls for stabilization

Tagged: controls, HAPP, RCS, MATLAB, Simulink, stabilization

Comment
HAPP Research
April 24, 2016

First post!

HAPP Research
April 24, 2016
First post!

Launch of the HAPP Blog

Tagged: HAPP, firstpost, inspiration

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