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Dynamic Calibration Of The Nasa Ames Rotor Test Apparatus Steady Dynamic Rotor Balance
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Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781723036132 Total Pages :114 pages Book Rating :4.0/5 (361 download)
Book Synopsis Dynamic Calibration of the NASA Ames Rotor Test Apparatus Steady/Dynamic Rotor Balance by : National Aeronautics and Space Administration (NASA)
Download or read book Dynamic Calibration of the NASA Ames Rotor Test Apparatus Steady/Dynamic Rotor Balance written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Ames Rotor Test Apparatus was modified to include a Steady/Dynamic Rotor Balance. The dynamic calibration procedures and configurations are discussed. Random excitation was applied at the rotor hub, and vibratory force and moment responses were measured on the steady/dynamic rotor balance. Transfer functions were computed using the load cell data and the vibratory force and moment responses from the rotor balance. Calibration results showing the influence of frequency bandwidth, hub mass, rotor RPM, thrust preload, and dynamic loads through the stationary push rods are presented and discussed. Peterson, Randall L. and vanAken, Johannes M. Ames Research Center CALIBRATING; ROTOR DYNAMICS; ROTORS; DYNAMIC LOADS; AERODYNAMIC BALANCE; DYNAMIC RESPONSE; MOMENTS OF INERTIA; STABILITY DERIVATIVES; HUBS; TRANSFER FUNCTIONS; STRUCTURAL VIBRATION...
Book Synopsis Dynamic Calibration of the NASA Ames Rotor Test Apparatus Steady/Dynamic Rotor Balance by :
Download or read book Dynamic Calibration of the NASA Ames Rotor Test Apparatus Steady/Dynamic Rotor Balance written by and published by . This book was released on 1996 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a Calibration Rig for a Large Multi-Component Rotor Balance by :
Download or read book Development of a Calibration Rig for a Large Multi-Component Rotor Balance written by and published by . This book was released on 2000 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: A calibration rig has been designed and constructed at the NASA Ames Research Center to calibrate the multi-component rotor balance in the Large Rotor Test Apparatus. The rotor balance capacity is 52,000 lbs thrust, 15,000 lbs shear force, and 125,000 ft-lbs of roll and pitch moment. The rotor shaft flex-coupling has a torque capacity of 164,800 ft-lbs. Eleven hydraulic actuators with in-line load cells, operating in a tension mode only, are used to apply the calibration loading. The Large Rotor Test Apparatus, the rotor balance, and the design and operation of the calibration rig are described.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781722767570 Total Pages :26 pages Book Rating :4.7/5 (675 download)
Book Synopsis Simulated Rotor Test Apparatus Dynamic Characteristics in the 80- By 120-Foot Wind Tunnel by : National Aeronautics and Space Administration (NASA)
Download or read book Simulated Rotor Test Apparatus Dynamic Characteristics in the 80- By 120-Foot Wind Tunnel written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-13 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A shake test was conducted in the 80 by 120 foot Wind Tunnel at NASA Ames Research Center, using a load frame and dummy weights to simulate the weight of the NASA Rotor Test Apparatus. The simulated hub was excited with broadband random excitation, and accelerometer responses were measured at various locations. The transfer functions (acceleration per unit excitation force as a function of frequency) for each of the accelerometer responses were computed, and the data were analyzed using modal analysis to estimate the model parameters. Hoque, M. S. and Peterson, R. L. and Graham, T. A. Ames Research Center RTOP 505-61-51...
Author :National Aeronautics and Space Adm Nasa Publisher :Independently Published ISBN 13 :9781793999474 Total Pages :32 pages Book Rating :4.9/5 (994 download)
Book Synopsis A Dynamic Calibration Method for Experimental and Analytical Hub Load Comparison by : National Aeronautics and Space Adm Nasa
Download or read book A Dynamic Calibration Method for Experimental and Analytical Hub Load Comparison written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2019-01-14 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents the results from an ongoing effort to produce improved correlation between analytical hub force and moment prediction and those measured during wind-tunnel testing on the Aeroelastic Rotor Experimental System (ARES), a conventional rotor testbed commonly used at the Langley Transonic Dynamics Tunnel (TDT). A frequency-dependent transformation between loads at the rotor hub and outputs of the testbed balance is produced from frequency response functions measured during vibration testing of the system. The resulting transformation is used as a dynamic calibration of the balance to transform hub loads predicted by comprehensive analysis into predicted balance outputs. In addition to detailing the transformation process, this paper also presents a set of wind-tunnel test cases, with comparisons between the measured balance outputs and transformed predictions from the comprehensive analysis code CAMRAD II. The modal response of the testbed is discussed and compared to a detailed finite-element model. Results reveal that the modal response of the testbed exhibits a number of characteristics that make accurate dynamic balance predictions challenging, even with the use of the balance transformation. Kreshock, Andrew R. and Thornburgh, Robert P. and Wilbur, Matthew L. Langley Research Center NASA/TM-2017-219601, ARL-RP-0592, L-20736, NF1676L-25065
Book Synopsis Dynamics of the McDonnell-Douglas Large Scale Dynamic Rig and Dynamic Calibration of the Rotor Balance by : Khanh Nguyen
Download or read book Dynamics of the McDonnell-Douglas Large Scale Dynamic Rig and Dynamic Calibration of the Rotor Balance written by Khanh Nguyen and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rotorcraft Research Testing in the National Full-Scale Aerodynamics Complex at NASA Ames Research Center by :
Download or read book Rotorcraft Research Testing in the National Full-Scale Aerodynamics Complex at NASA Ames Research Center written by and published by . This book was released on 1985 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1995 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1996 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Test of a Dynamic Balancing Machine for Small Rotors by : James E. Hammerstone
Download or read book Design and Test of a Dynamic Balancing Machine for Small Rotors written by James E. Hammerstone and published by . This book was released on 1950 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1996-09 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vertiflite written by and published by . This book was released on 2008 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325) by :
Download or read book Aeronautical Engineering: A Cumulative Index to a Continuing Bibliography (supplement 325) written by and published by . This book was released on 1995 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The History of the XV-15 Tilt Rotor Research Aircraft by : Martin D. Maisel
Download or read book The History of the XV-15 Tilt Rotor Research Aircraft written by Martin D. Maisel and published by . This book was released on 2000 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ames Research Center written by and published by . This book was released on 1968 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rotorcraft Aeromechanics by : Wayne Johnson
Download or read book Rotorcraft Aeromechanics written by Wayne Johnson and published by Cambridge University Press. This book was released on 2013-04-29 with total page 949 pages. Available in PDF, EPUB and Kindle. Book excerpt: A rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration concepts. Aeromechanics covers much of what the rotorcraft engineer needs: performance, loads, vibration, stability, flight dynamics, and noise. These topics include many of the key performance attributes and the often-encountered problems in rotorcraft designs. This comprehensive book presents, in depth, what engineers need to know about modelling rotorcraft aeromechanics. The focus is on analysis, and calculated results are presented to illustrate analysis characteristics and rotor behaviour. The first third of the book is an introduction to rotorcraft aerodynamics, blade motion, and performance. The remainder of the book covers advanced topics in rotary wing aerodynamics and dynamics.
