Rocket TransducerRocket Transducer
Group 1/3Group 1/3Patrick MorganPatrick Morgan
Lance YoneshigeLance Yoneshige
May 6, 2004May 6, 2004
Instructor: Bruce LiebertInstructor: Bruce LiebertUniversity of Hawaii at ManoaUniversity of Hawaii at Manoa
ME 401ME 401
DesignDesignAssembly:Assembly:
Design (Continued)Design (Continued) Base:Base:
Design (Continued)Design (Continued) Beam:Beam:
Design (Continued)Design (Continued)
Design (Continued)Design (Continued)
Test LaunchTest Launch
Software CorrectionSoftware Correction Attenuation Attenuation
Use of “Fired” & “Unfired” Use of “Fired” & “Unfired” datadata
Cut-off FrequencyCut-off Frequency Input & Output Cut-off Input & Output Cut-off
Frequency determined to be Frequency determined to be 22 Hz for 99%; 9 Hz for 95%.22 Hz for 99%; 9 Hz for 95%.
21
222
21
nn ff
ffA
ResultsResultsHarmonic CharacteristicsHarmonic Characteristics
Fired RocketFired Rocketf_n = 56 Hzf_n = 56 Hz = 0.02= 0.02
Unfired RocketUnfired Rocketf_n = 45 Hzf_n = 45 Hz = 0.02= 0.02
Results (Continued)Results (Continued)
Results (Continued)Results (Continued)
Results (Continued)Results (Continued) Error with 95% of signal: Error with 95% of signal:
M(M(__nn) = 3.3%) = 3.3%
2
1222
21
nnnM
Questions?Questions?