In-Flight Vibration Environment of the NASA F-15B Flight Test Fixture PDF Download
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Author: Publisher: ISBN: Category : Airplanes Languages : en Pages : 34
Book Description
Flight vibration data are analyzed for the NASA F- 1 5B/Flight Test Fixture 11 test bed. Understanding the in-flight vibration environment benefits design and integration of experiments on the test bed. The power spectral density (PSD) of accelerometer flight data is analyzed to quantify the in-flight vibration environment from a frequency of 15 Hz to 1325 Hz. These accelerometer data are analyzed for typical flight conditions and maneuvers. The vibration data are compared to flight-qualification random vibration test standards. The PSD levels in the lateral axis generally are greater than in the longitudinal and vertical axes and decrease with increasing frequency. At frequencies less than approximately 40 Hz, the highest PSD levels occur during takeoff and landing.
Author: Publisher: ISBN: Category : Airplanes Languages : en Pages : 34
Book Description
Flight vibration data are analyzed for the NASA F- 1 5B/Flight Test Fixture 11 test bed. Understanding the in-flight vibration environment benefits design and integration of experiments on the test bed. The power spectral density (PSD) of accelerometer flight data is analyzed to quantify the in-flight vibration environment from a frequency of 15 Hz to 1325 Hz. These accelerometer data are analyzed for typical flight conditions and maneuvers. The vibration data are compared to flight-qualification random vibration test standards. The PSD levels in the lateral axis generally are greater than in the longitudinal and vertical axes and decrease with increasing frequency. At frequencies less than approximately 40 Hz, the highest PSD levels occur during takeoff and landing.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781720580195 Category : Languages : en Pages : 32
Book Description
Flight vibration data are analyzed for the NASA F-15B/Flight Test Fixture II test bed. Understanding the in-flight vibration environment benefits design and integration of experiments on the test bed. The power spectral density (PSD) of accelerometer flight data is analyzed to quantify the in-flight vibration environment from a frequency of 15 Hz to 1325 Hz. These accelerometer data are analyzed for typical flight conditions and maneuvers. The vibration data are compared to flight-qualification random vibration test standards. The PSD levels in the lateral axis generally are greater than in the longitudinal and vertical axes and decrease with increasing frequency. At frequencies less than approximately 40 Hz, the highest PSD levels occur during takeoff and landing. Peaks in the PSD data for the test fixture occur at approximately 65, 85, 105-110, 200, 500, and 1000 Hz. The pitch-pulse and 2-g turn maneuvers produce PSD peaks at 115 Hz. For cruise conditions, the PSD level of the 85-Hz peak is greatest for transonic flight at Mach 0.9. From 400 Hz to 1325 Hz, the takeoff phase has the highest random vibration levels. The flight-measured vibration levels generally are substantially lower than the random vibration test curve.Corda, Stephen and Franz, Russell J. and Blanton, James N. and Vachon, M. Jake and DeBoer, James B.Armstrong Flight Research CenterF-15 AIRCRAFT; VIBRATION TESTS; FLIGHT TESTS; RANDOM VIBRATION; FIXTURES; POWER SPECTRA; FLIGHT CONDITIONS; STEADY STATE; AIRCRAFT MANEUVERS; ACCELEROMETERS
Author: Nathan Palumbo Publisher: ISBN: Category : Airplanes Languages : en Pages : 20
Book Description
Flights of the F-1513/Propulsion Flight Test Fixture (PFTF) with a Cone Drag Experiment (CDE) attached have been accomplished at NASA Dryden Flight Research Center. Mounted underneath the fuselage of an F-15B airplane, the PFTF provides volume for experiment systems and attachment points for propulsion experiments. A unique feature of the PFTF is the incorporation of a six-degree-of-freedom force balance. The force balance mounts between the PFTF and experiment and measures three forces and moments. The CDE has been attached to the force balance for envelope expansion flights. This experiment spatially and inertially simulates a large propulsion test article. This report briefly describes the F-15B airplane, the PFTF, and the force balance. A detailed description of the CDE is provided.
Author: The European Society of Telemetry Publisher: BoD – Books on Demand ISBN: 3756845354 Category : Technology & Engineering Languages : en Pages : 242
Book Description
The way we prepare and analyse tests has evolved, as well as the way we perform and conduct those tests. However, we all concluded that the face-to-face exchange could not be replaced by any digital event. The ettc2022 was the first in-person telemetry event since the outbreak of the pandemic in 2020. The conference presented a dense technical program of more than 40 high quality papers, merged in the Conference Proceedings. As always, you could find the latest and most promising methods here but also hardware and software ideas for the telemetry solutions of tomorrow.
Author: Alberto Berrueta Publisher: BoD – Books on Demand ISBN: 1803554746 Category : Technology & Engineering Languages : en Pages : 110
Book Description
Welcome to an in-depth look at the breakthroughs and challenges in the world of lithium batteries. This edited volume covers the history, current state, and future prospects of various aspects of lithium battery research. We explore the quest for higher energy and power density, better safety measures, and sustainable innovations driving the lithium battery revolution. The chapters address the challenges of anode materials, the crucial importance of safety, the specific needs of batteries for aerial electric vehicles, and advancements in lithium metal batteries. These chapters offer a thorough overview for enthusiasts, researchers, and industry experts. Key topics include nanostructuring, thermal runaway mitigation, 3D printing, and custom designs. This book provides insights into lithium battery technology and a roadmap towards sustainable, efficient, and innovative energy solutions. Discover the future of energy storage as we work together to advance lithium-ion battery technology.
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Author: National Aeronautics and Space Administration (NASA)
Author: Nathan Palumbo
Author: Trong T. Bui
Author: The European Society of Telemetry
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Author: Alberto Berrueta
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