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high_altitude_balloon [2014/09/04 14:31] (current)
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 +====== High_Altitude_Balloon ======
  
 +{{wiki:​HabState02.JPG?​300|Current state of the Cylon HAB}}
 +=====Payload=====
 +*Flight Computer
 +**[[http://​www.htc.com/​us/​smartphones/​htc-evo-4g-sprint/​|HTC EVO 4G]]
 +**[[https://​www.sparkfun.com/​products/​10748|IOIO for Android]]
 +**[[http://​www.seeedstudio.com/​depot/​relay-shield-p-693.html|Seeed Studio Relay Shield]]
 +**Barometric Altimeter- [[Parallax MS5607 Barometric Altimeter]]
 +**[[Cylon HAB Dock Board]]
 +*[[http://​gopro.com/​cameras/​hd-hero-naked-camera/​|GoPro Hero HD w/ SD Card]]
 +*Power- Battery
 +*VHF/UHF Radio- [[http://​www.yaesu.com/​indexVS.cfm?​cmd=DisplayProducts&​ProdCatID=111&​encProdID=5CB596EBED9A3EE26635C7E1F02500D9|Yaesu VX-3R HT]]
 +
 +=====Communications=====
 +*Wifi- Ground Ops (Possibility for future long range applications)
 +*Cellular (Currently Disabled)
 +*VHF- ARPS Tracking
 +
 +=====Power=====
 +*Each of the following components has it's own battery:
 +**Flight Computer
 +**GoPro Hero
 +**VHF Radio
 +*A 11.1V Battery Pack powers the following devices
 +**IOIO
 +**Relay Shield
 +*Individual 9V Batteries power the pyrotechnics and Audible Alarm
 +====Hotel Power Requirements====
 +*Factors:
 +**Predicted Flight Time: 2 hrs
 +**Estimated Recovery Time: 4 hrs
 +**Battery: 11.1V LiPo Battery Pack
 +**Safety Factor: 2
 +**Battery Requirement:​ 12 hrs
 +
 +{| class="​wikitable"​ style="​color:​ green;"​
 +!Loads!!Battery Type!!Power Requirement
 +|-
 +|
 +*IOIO
 +*Relay Board
 +*Flight Computer
 +||Standard 9V||1W
 +|}
 +
 +
 +Power = Current x Voltage = 1W
 +
 +1W/11.1V = 90 mA
 +
 +Charge = Current * Time = 90mA * 12hrs = 1081 mAh
 +
 +=====Recovery=====
 +*Cut-Down Wire- Disconnects the Balloon from the Payload after a specified altitude or time.
 +*Parachute System- Deploys parachute after payload falls below a specified altitude.
 +*Marking Smoke- Ignites smoke to aid in tracking.
 +*Alarm- Audible Alarm activates on loss of power or touchdown
 +*[[Plaque]]- Just in case it winds up in Oz.
 +
 +=====Airframe=====
 +*1/8" plywood for structural support
 +*Foam panel for insulation
 +
 +=====Lift=====
 +*Helium Filled Weather Balloon
 +
 +=Ground Station=
 +*Downlink Station
 +**Computer
 +**Wireless Bridge
 +**Directional Antenna
 +*METOC Computer
 +**Spot Tracking Software
 +**Balloon Trajectory Software
 +**Google Maps for Route Guidance
 +
 +
 +=Flight Theory=
 +*Stage 1- Lift
 +**Balloon Travels through lower atmosphere.
 +*Stage 2- Flight
 +**Balloon rises above weather systems. Curvature of the earth is visible
 +*Stage 3- Disconnect
 +**Either at flight ceiling or immediately after burst detected, Arduino closes relay which disconnects payload from balloon.
 +*Stage 4- Freefall
 +**Payload free falls back to ground. ​
 +*Stage 5- Parachute Deployment
 +**At the designated altitude, Arduino closes relays which causes parachutes to be ejected and smoke to be activated.
 +*Stage 6- Recovery
 +**Ground Crew retrieves payload based on predictions,​ real time GPS location data, audible alarm and smoke trail.
 +
 +=Crew Requirements=
 +*METOC/​Route Coordinator- Responsible for choosing launch site, running predictions,​ tracking ​
 +*Chase Vehicle
 +**Driver
 +**Spotter
 +*Tech Support
 +
 +=Project Benchmarks=
 +**Bold** indicates steps currently in development. <​strike>​Striked</​strike>​ indicates steps completed.
 +***Develop Flight System**
 +**<​strike>​Hello World for Android</​strike>​
 +**<​strike>​Access Sensors</​strike>​
 +**<​strike>​List All Sensors</​strike>​
 +**<​strike>​Display All Sensors</​strike>​
 +**<​strike>​Develop Control Loop</​strike>​
 +**<​strike>​Develop Dock Board</​strike>​
 +**<​strike>​Install IOIO</​strike>​
 +**<​strike>​Integrate Altimeter</​strike>​
 +**<​strike>​Log file</​strike>​
 +**<​strike>​Assemble Dock Board</​strike>​
 +**Test Altimeter
 +**Build TinyTNC
 +**Test APRS Range
 +**Test Relay outputs
 +**Develop Flight Logic
 +**Develop Web Based Control
 +*<​strong>​Airframe Development</​strong>​
 +**<​strike>​Manufacture Base</​strike>​
 +    * Manufacture Top
 +**<​strike>​Mount Android</​strike>​
 +**<​strike>​Mount GoPro</​strike>​
 +**Mount Battery
 +**Mount Dock Board
 +**Mount Recovery System
 +**Battery Pack
 +*Recovery System
 +**Cut-down System
 +**Parachute Deployment System
 +**Smoke System
 +**Audible Alarm System
 +*Build Insulating Airframe
 +**Cutouts for camera view-ports and recovery systems
 +**Identifying Plaque
 +*Testing
 +*Setup Tracking Vehicle
 +*Setup Tracking Base Station
high_altitude_balloon.txt ยท Last modified: 2014/09/04 14:31 (external edit)