Project SCREAM September 23, 2008
Proposal
Project SCREAM
“Space Centered Reading of Ear Audibility Measurements” Team SCREAM: Joshua Yeaton, Kevin Dinkel, Dillon Thorse, Christopher Warren, Christopher Kopacz, Conrad Schmidt
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Team SCREAM Project SCREAM September 23, 2008
Overview and Mission Statement:
The primary mission of Project SCREAM shall be to ascend to an altitude between 25,000 – 30,000 meters to better understand how sound behaves in near space conditions. It is a known fact that sound cannot be heard in the vacuum of space because sound waves require a transport medium. With increasing altitude off the earth’s surface, the atmosphere becomes less populated with air molecules (decreased air density), thus diminishing the medium which sound relies on for travel. We hypothesize that as our BalloonSat nears the silence of space, sound amplitude will decrease as a function of altitude. We theorize that a 261.33 Hertz middle C, played at a constant decibel level on ground, will decrease in amplitude as altitude increases and air pressure decreases. Altitude shall be measured using an atmospheric pressure sensor. Project SCREAM shall also produce photographic images of the horizon of Earth using a digital camera.
Technical Overview:
Design: The structure of the BalloonSat will be in the shape of a rectangle. The camera will be pointed out one side of rectangle, with a sound chamber (designed to remove outside noise) on the other side of the rectangle. The heater and HOBO will be in between the sound chamber and the camera. The tuner microphone will be flush with the wall of the outside edge of the sound chamber, while the microphone will be on the inside edge of the sound chamber.
Hardware: Component Weight (grams) Foam Core 150.00 9 volt Battery (3) 101.40 12 volt Battery (1) 33.80 Canon A570IS Digital Camera w/ Memory Card 220.00 Timing Circuit 60.00 Hobo Temperature Data Logger 29.00 Hobo Atmospheric Pressure Data Logger 29.00 Switches (2) 20.00 Heater Circuit 60.00 Korg CA30 Chromatic Tuner 66.80 Sony ICDP620 Digital Voice Recorder 50.00 Insulation and Styrofoam Chamber 100.00 AAA Battery (4) 30.40 Total 950.40
Testing:
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Team SCREAM Project SCREAM September 23, 2008
Impact Testing: The structure of the satellite will be tested to see if it will remain intact during the landing of the satellite. Once it has been constructed to specifications, it will undergo a few tests to ensure stability. We will kick the body of the satellite down a set of stairs as this has been confirmed as an accurate portrayal of the damage a satellite must endure by being dragged through a field after impact. The structure will also dropped from a balcony or other high place to test whether the satellite will survive the sudden impact that will end its descent from the atmosphere. For these tests, the actual internal components will not be included as these are only tests of the design of the structure. A mass replacement (weighted object) will be put inside the satellite for these tests to simulate the weight of the systems inside the satellite.
Whip Test: Once the structure of the satellite has been confirmed to be stable and sufficient for the needs of our experiment, a whip test will be preformed to ensure that the tether apparatus will be functioning properly during the actual launch (specifically at the time of balloon pop). A replacement rope will be strung through the satellite’s tether apparatus followed by repeated violent swinging of the satellite to simulate the stresses it will endure. It is also possible that additional impact testing may take place during the whip test to indicate whether the structure will hold up to a more intense impact. Again, a mass replacement will be used to simulate the mass of the components inside the satellite.
Full Systems Tests: Once the satellite has been assembled, and the structures have passed the whip and impact tests, it will undergo tests to ensure that all components are functioning properly together within the satellite and in the conditions of near space. The satellite will be entirely put together and tested to see that the components are working. Following this test, the satellite will be placed into a cooler of dry ice for a period of time to determine whether or not the insulation and heater of the satellite do a sufficient job at keeping the batteries and other components at a working temperature.
Team Safety:
Good safety technique starts with awareness. Good communication techniques will be used to make sure all team members present will be informed when potential danger exists. Also, when team members are soldering or doing anything that needs safety glasses everyone in the immediate area will be wearing safety glasses. At times such as the cold test gloves will be worn as well. When doing all structural tests team members will be out of the way and make sure that all innocent bystanders are out of the way as well. When using sharp objects there will be no horseplay allowed to avoid unnecessary injuries. When dealing with electrical current, proper precautions will be taken to ensure that nobody is electrocuted. In summary, building a satellite is fun; however it is not a game and will be taken seriously.
General Proposal Requirements Met:
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Team SCREAM Project SCREAM September 23, 2008
The general proposal requirements will be met by Team SCREAM through the following means: All necessary systems such as the HOBO will be on board to take fundamental data readings. The satellite will stay above zero degrees Celsius because of the on board heater and insulation that Team SCREAM will install. Team SCREAM will have a primary experiment separate from the on board camera and HOBO data loggings. This experiment will consist of a sound chamber, a sound emitter, and a sound receiver. The satellite will be structurally sound so that all the experiments will be performed, logged, and retrieved.
Launch Program:
The Launch Program events will occur as follows: Team SCREAM will be at the designated meeting spot in Boulder and ready to leave with our satellite at 0500 on November 27. Team SCREAM will arrive at Windsor, Colorado at 0730 ready to launch. 1.5 hours before the flight Team SCREAM will do a system check on all the electronic systems and make sure that all the hardware in the satellite is secured in the correct position. Team SCREAM will then secure the satellite to the rope by running the rope through the satellite. When it is time to launch a representative from our team will hold the satellite in a line with all the other satellites and release it when the balloon and satellite in front of him is released. Team SCREAM will then get into a car and go on the chase to find the balloon satellites. Once Team SCREAM has found their satellite they will turn off the systems and inspect it to see if there is any structural damage. Team SCREAM will then put the satellite in a safe place in preparation to collect its data. Finally Team SCREAM will eat a well-deserved lunch after a long day of launching and chasing.
Summary of Events:
1) Leave Boulder at 0500 2) Perform system check on all systems 3) Arrive at Windsor at 0730 4) Attach satellite to rope descending from balloon 5) Team representative hold and release satellite at appropriate times 6) Get in cars and leave on the chase for the balloon satellites 7) Arrive at landing spot of balloon satellites 8) Recover satellite 9) Turn off systems 10) Secure satellite in preparation for data collection 11) Eat lunch with team
Block Diagram: Page 4 of 9
Team SCREAM Project SCREAM September 23, 2008
12 V Battery 9 V Battery 9 V Battery 9 V Battery 12 V Battery 9 V Battery 9 V Battery 9 V Battery
Switch Switch Switch Switch HOBO Pressure HOBO Pressure Heater Sensor Timer Heater Sensor Timer Recorder Recorder External HOBO External HOBO Temp Speaker Recorder Power Temp Speaker Recorder Power Camera Power Camera Power Camera Source Camera Speaker Power Source Speaker Power
Design Diagram:
Timing Circuit Heater Camera
12 V Battery Pressure Sensor
Temperature Sensor 9 V Batteries
HOBO Tuner Recorder Sound Chamber
Management and Cost Overview:
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Team SCREAM Project SCREAM September 23, 2008
Team Members:
Joshua Yeaton: Personal: Josh was born in Adelaide, Australia on November 16, 1989. His favorite book is The Hitchhiker’s Guide to the Galaxy. Major: Aerospace Engineering Phone: 907.350.8446 School: University of Colorado at Boulder Address: Hallett Hall
Dillon Thorse: Personal: Dillon was born in Boston, Massachusetts on September 8, 2008. His favorite novel is Life of Pi. Major: Aerospace Engineering Phone: 512.496.3400 School: University of Colorado at Boulder Address: Brackett Hall
Chris Kopacz: Personal: Chris was born in Denver, Colorado on October 24, 1989. His dream is to one day become an astronaut. Major: Aerospace Engineering Phone: 719.393.2766 School: University of Colorado at Boulder Address: Aden Hall
Kevin Dinkel: Personal: Kevin was born in Annapolis, Maryland on November 21, 1989. His favorite movie is Contact. Major: Aerospace Engineering Phone: 303.335.6205 School: University of Colorado at Boulder Address: Hallett Hall
Chris Warren: Personal: Chris was born in Sioux Falls, South Dakota on November 17, 1989. His favorite movie is Batman Begins. Major: Aerospace Engineering
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Team SCREAM Project SCREAM September 23, 2008
Phone: 719.640.4251 School: University of Colorado at Boulder Address: Smith Hall
Conrad Schmidt: Personal: Conrad was born in St. Louis, Missouri on February 20, 1989. In ten years, he wants to be flying F-35s in the Navy. Phone: 970. 390.8715 School: University of Colorado at Boulder Address: Crosman Hall
Keeping to Budget:
There are a number of steps the team will take to keep to the budget. First, the team will always attempt to use instruments provided from the class over separately purchased materials when they are available. Secondly, the team will (with the exception of the cold test) never test the structural integrity of the satellite (whip test, drop test, etc) with the instruments inside the satellite to ensure that we will not have to repurchase any instruments. Thirdly, we will attempt to be as frugal as possible with the materials (such as foam core) in the testing phases to save cost. It is also important to keep to the mass budget. The team will be sure to measure the masses of all components; if any are over the initial estimate, they must be trimmed down in order for the spacecraft to stay under the 1000 gram limit. The budget will be managed by team member Kevin Dinkel.
Schedule:
The team will meet at least two times per week to discuss project assignments and conduct building and testing. Meetings will be on Tuesday and Wednesday at 5:00 PM.
Week 1, 9/15-9/21: All members work on proposal assignments. Presentation construction on 9/21. Week 2, 9/22-9/28: Proposal due 9/23. Team Presentations 9/23. Complete proposal. Week 3, 9/29-10/5: HW 05 due 10/02. Complete design for DD Rev A next week. Order hardware. Week 4, 10/6-10/12: DD Rev A due 10/9. Start construction and begin testing. DD Rev B for next week.
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Team SCREAM Project SCREAM September 23, 2008
Week 5, 10/13-10/19: DD Rev B due/Presentations due 10/14. Work on prepping for in-class demonstration of hardware. Final design prototyping. Week 6, 10/20-10/26: Team in-class demonstrations 10/23. Complete building final design. Week 7, 10/27-11/2: Final Testing. Cold test must be completed. BalloonSat completed on weekend. Week 8, 11/3-11/9: In-class mission simulation 11/4 and 11/6 – BALLOONSAT COMPLETED. LRR Cards due 11/6. DD Rev C due 8:00 AM 11/6. Launch Prep. Week 9, 11/10-11/16: Final BalloonSat Weigh-in and TURN IN 2:00 PM 11/14. LAUNCH DAY 11/15. LRR Presentations 11/11. Launch prep prior to launch. Week 10, 11/17-11/23: Bring raw flight data 11/18. Process flight data. Week 11, 11/24-11/30: Fall Break. Work on final presentation and DD Rev D. Week 12, 12/1-12/7: DD Rev D Due 12/2. ALL presentations due 12/2. HW 06 Due.
Team Organization:
Joshua Yeaton: Team Leader/Microphone and Speaker Configuration Kevin Dinkel: Budget Organization/Structures Dillon Thorse: Structures/Camera Conrad Schmidt: Soldering/Electrical Chris Kopacz: Structures/Camera Chris Warren: Microphone/Speaker Configuration
As all members of the team are aerospace engineering majors with little experience in their respective areas, these designations are somewhat flexible. If anyone needs help with a specific assigned part of the satellite, the rest of the team will assist as needed.
Budget: Component Price Foam Core (provided) 9 volt Battery (3) (provided) 12 volt Battery (1) (provided) Canon A570IS Digital Camera w/ Memory Card (provided) Page 8 of 9
Team SCREAM Project SCREAM September 23, 2008
Timing Circuit (provided) Hobo Temperature Data Logger (provided) Hobo Atmospheric Pressure Data Logger (provided) Switches (2) (provided) Heater Circuit (provided) Korg CA30 Chromatic Tuner $20.00 Sony ICDP620 Digital Voice Recorder $57.88 Insulation and Styrofoam Chamber $20.00 AAA Battery (4) $10.75 Total $108.63
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Team SCREAM