Fall 2011 Rev A 08-16-11 TEAM kkkkkConceptual Design Review SaadAlqahtani, Charles MacCraiger, AlexaWarly, Connor Jacobson, Kyle Skjerven, Matt Busby 09/19/11
Mission Overview • Measure wind speed at different altitudes • How does the amount of wind change at different altitudes? • What are the altitudes for the greatest wind speeds? • The ideal height or altitude for elevated or floating wind turbines. • Maximize power gathering.
How we will achieve what we want to discover • - Bicycle computer will record rotational velocity and rate of ascent • -These measurements will be recorded together to plot wind speed as a function of height. • -rotating cup anemometer to capture wind flow from more than one direction • -Its rate of rotation will be captured using the bicycle computer which will collect the data • -computer has its own power source. • -The design of the satellite shall be designed to protect the rotating cups for retrieval but also let wind flow to the cups through this structure.
How We Are Going to Turn Our Design Into a Satellite • -basic cube or rectangular prism shaped structure • - order our bike computer and build an anemometer. • -The bike computer has a magnet that we are going to attach to a free-spinning propeller • -The sensor will sense a change in magnetic field every time the magnet makes a revolution on the propeller. • -install the anemometer to the top of our box to record wind speed from any direction. • -basic cage structure to protect our propeller • - Our bike computer will be able to track the rpm of the propeller at various set times, and then using our altitude measurements will allow us to figure out the wind speed at various altitudes.
Testing our design • -The whip test, drop test, and staircase test • -mimic rise and fall of the payload, the burst of the balloon, and crash of the payload • -Whip tests-The whip test will be done by attaching the payload to a firm string and whipping it in jerky back and forth motions to simulate the effects of burst on the satellite. • -drop test- The drop test will see if the payload and its internal subsystems can endure the impact of the fall. This will be done by dropping the payload from a large balcony • - freeze tests- make sure the payload can withstand internal temperatures of about -10 degrees Celsius at 30 km high. This will be done by placing the payload in a container of dry ice which will have similar effects on the payload as the actually flight will have
Testing Cont. • - staircase test-The staircase test will see if the satellite can withstand the crash and rolling after the impact. • -condensation tests • -camera tests in order to make sure our balloon sat can withstand the obstacles of the rise and fall of the payload. • - test the effectiveness of the anemometer in the wind simulator. • --We are going to test our anemometer in a wind tunnel to see how many revolutions per minute we get during five, ten, and fifteen mph winds • - This will help us convert our readings from the bike computer into wind speed after the launch.
Testing Cont. • - electricity tests • - make sure data will be properly recorded • -the on and off switch can consistently turn on the hobo, the anemometer, and all electric battery-run subsystems • -make sure data is recorded by going to different altitudes to check if the hobo records location • -We can check that the hobo records temperature with the dry ice test and by breathing on the thermometer. • -We will test the bicycle computer multiple times beforehand to synchronize the custom waypoint function with the projected flight plan.
How we will achieve the Requirements • -Follow the RFP document • - All components will be weighed • -Tests before launch • - The satellite shall be made out of foam core • -within the satellite • - the HOBO • - camera • -internal heater (as to not let the internal temperature drop below -10 Celsius,) • - the internal tube.
How we will achieve requirements • -structure must accommodate external cables such as the external HOBO cable and our own external wind speed anemometer • - sturdy and insulated structure • -to withstand burst, ascent, descent ,and impact • -Condensation prevention • - Measurements- universal measuring system.
Biggest Worries • Biggest Worries… • Weight Requirements • Functionality of home-made anemometer • Structural integrity/protection of systems