1 / 16

Sound Pressure Study: Final Presentation and Results Analysis

This presentation summarizes the Echo final mission exploring sound waves' interaction with air pressure, comparing sounding and external pressure data, and evaluating temperature and humidity using HOBO data loggers. Imaging hardware captured photographs with primary ELF and secondary IR filters. The design includes a shock-mounted system with compact internal arrangement and atmospheric venting. Results indicated a correlation between sound transmission and pressure, suggesting more flights for conclusive results. Lessons learned include equal attention to all craft parts, simpler activation methods, and the importance of thorough testing. The message to the next semester emphasizes seeking help, tackling problems methodically, pursuing challenging experiments, and allowing ample troubleshooting time.

ohio
Télécharger la présentation

Sound Pressure Study: Final Presentation and Results Analysis

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Echo Final Presentation Andrew Berg, Shawn Carroll, Cody Humbargar, Jade Nelson, Jared Russell, Austin Williamson 12-05-06

  2. Mission Overview Main Science Mission- • Test the effect of air pressure on sound waves. • Compare sounding data to EOSS pressure data. Secondary Science Mission- • HOBO data logger used to measure internal and external temperature during flight • HOBO also used to test humidity levels inside balloon-satellite. Non-Science Mission- • Using main imaging hardware to take photographs during flight. • Secondary imaging hardware will using ultraviolet / infrared filters to take photographs.

  3. Design • Balloon satellite measuring 150mm x 145mm x 100mm. • Cameras face same direction -Primary ELF -Secondary 35mm IR Photography • Main science system will be shock mounted • Compact internal arrangement • Atmospheric venting through desiccant

  4. Design Pictures

  5. RFP Satisfaction • Payload will be ready to fly by the end of the week • Mass and financial budget were not exceeded • Other RFP requirements met

  6. Results and Analysis • Expected Results • Linear correlation • Possible correlation with temperature • Data Analysis • EOSS Pressure Data • Derived pressure based on altitude (General Case) • Running average of voltage data

  7. Data Conclusions • Definite Correlation, but not linear as expected. • More trials (launches) are needed to reach more specific conclusions. • -Data could be inaccurate due to equalization lag • -Need accurate pressure sensor • Sources of error • -Equalization lag • -Pressure sensor accuracy

  8. Flight Statistics • Max ascent rate: 1501.313 ft/min • Max descent rate: 9944.23 ft/min • Launch: 7:28:47 11/11/2006 • Landing: 9:54:17 11/11/2006 • Max altitude: 98832.02 ft at 9:23:17

  9. Ready To Fly Again • Final preflight too complicated -Camera power on main switch -Resolve film issues • Camera failure due to battery enclosure -Fixed battery enclosure -Could switch timer relay to DPST • Low peak voltage at sensor -Modified sound tube

  10. Sound Experiment Experiment As Flown Modified Experiment

  11. Round Two Pre-Flight • Store the payload,closed, in a cool, dry place • Replace Consumables • -Modify IR film canister • -Clean IR filter • Activation • -Power on cameras • -Set flash • -Activate timing circuit

  12. Conclusions • The correlation between sound transmission and pressure could be linear, but additional flights are needed for surety. • Given the data, sound does not conduct as well at higher altitudes compared to lower altitudes.

  13. Lessons Learned • All parts of the craft need equal attention • Activation should not require the craft to be open • Tape is ineffective in near-space

  14. Message To Next Semester • Don’t be afraid to ask for help • Take your problems one at a time • Keep your experiment simple, but try something challenging • Test thoroughly • Leave plenty of time for problems

More Related