Dynamic characteristics of Titan vehicles related to the Pogo phenomenon were found through the analysis of low-level random accelerations and pressures from ground test and flight data. Natural frequencies of vibration of propellant suction lines and of flight vehicle longitudinal motion have been successfully detected from locations of peaks in auto spectra. The inflight performance of a standpipe accumulator has been evaluated by means of both auto-spectral and cross-spectral analyses. An anomalous occurrence of Pogo vibration on one flight was explained by the analysis as due to a lack of normal gas charge in the standpipes. A novel method is applied to the evaluation of the longitudinal structural dynamic model of the vehicle. The method involves the detection of 'node frequencies' at locations of accelerometers. (Author)
Detection of Titan Pogo Characteristics by Analysis of Random Data
1970
51 pages
Report
Keine Angabe
Englisch
Space Launch Vehicles & Support Equipment , Launch vehicles(Aerospace) , Stability , Structural properties , Vibration , Power spectra , Resonant frequency , Acceleration , Flight testing , Fuel pumps , Fuel consumption , Propellant tanks , Cavitation , Liquid rocket propellants , Booster motors , Accelerometers , Hydraulic accumulators , Pogo instability phenomenon , Titan
NTIS | 1981
NTRS | 1971
|NTRS | 1977
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