Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction

Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction Download PDF EPUB FB2

Get this from a library. Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction. [F K Straub; E V Byrns; United States. National Aeronautics and Space Administration.

Scientific and Technical Information Branch.; Langley Research Center.]. F.K. Straub, J.E.V. Byrns, Application of Higher Harmonic Blade Feathering on the OH-6A Helicopter for Vibration Reduction, NASA CRGoogle Scholar 6. Miao, S. Kottapalli, M.

Frye, Flight Demonstration of Higher Harmonic Control (HHC) on S, 42nd Annual Forum of the AHS, Washington, DC, USA, Google ScholarAuthor: Berend Gerdes van der Wall.

Higher Harmonic Control. A dream of helicopter dynamicists is to oscillate the main rotor blades in a manner to reduce the Np loads transmitted into the fuselage. The idea promises to achieve vibration reduction at the source (i.e., the rotor) and with low weight penalty since no extra actuators need be added to the aircrafts empty : William A.

Welsh. Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction / (Washington, D.C.: National Aeronautics and Space Administration, Scientific and Technical Information Branch ; Springfield, VA: for sale by the National Technical Information Service, ), by F.

Straub, E. Byrns, United States. National. Straub has written: 'Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction' -- subject(s): Helicopters, Rotors (Helicopters) Asked in Authors, Poets.

Higher-Harmonic-Control Algorithm for Helicopter Vibration Reduction Revisited Article (PDF Available) in Journal of Guidance Control and Dynamics 28(5) September with Reads.

HIGHER HARMONIC CONTROL (HHC) The primary source of helicopter vibration is the higher harmonic blade loads gener- ated by the aerodynamic environment at the rotor disk.

For an N-bladed rotor, the oscil- latory (N-l)P, NP, and (N+1)P blade loads are transmitted as exciting hub forces and moments to the airframe at a dominant frequency of N per. Steering Control of an Active Tether Through Mass Matrix Control.

Application of higher harmonic blade feathering on the OH-6A helicopter for vibration reduction higher harmonic blade. William A. Welsh, in Morphing Wing Technologies, Higher Harmonic Control.

A dream of helicopter dynamicists is to oscillate the main rotor blades in a manner to reduce the Np loads transmitted into the fuselage. The idea promises to achieve vibration reduction at the source (i.e., the rotor) and with low weight penalty since no extra actuators need be added to the aircrafts empty weight.

Application of higher harmonic blade feathering for helicopter vibration reduction. NASA Technical Reports Server (NTRS) Powers, R. Higher harmonic blade feathering. Full text of "DTIC ADA Engineering Design Handbook. Helicopter Engineering. Part Two. Detail Design" See other formats. The design, implementation, and flight test results of higher harmonic blade feathering for vibration reduction on the OH-6A helicopter are described.

The higher harmonic control (HHC) system superimposes fourth harmonic inputs upon the stationary swashplate. These inputs are transformed into 3P, 4P and 5P blade feathering angles. VIBRATION ANALYSIS Similarly, a hovering helicopter may be viewed as an application of this law.

Air then attempts to flow around the blade tips from the higher pressure on the bottom blade surface to lower pressure on the upper blade surface (Figure ).5/5(5). Noise Reduction Machine Oxygen Equipment Robotics Scrubber Spreader Tractor Trash Compactor Welding System other → Top brands AEG Aeg-Electrolux Canon Electrolux ESAB HP LG Miller Nikon Panasonic Philips Samsung Sony Volvo Whirlpool other →.

O Scribd é o maior site social de leitura e publicação do mundo. Flight Operations For Higher Harmonic Control Research by James Joseph McGovern Lieutenant, United States B.S., Navy United States Naval Academy, Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN AERONAUTICAL ENGINEERING from the NAVAL POSTGRADUATE SCHOOL March ABSTRACT The Department of.

OH-6A Aerodynamic Tests of an Operational OH-6A Helicopter in the Ames 40x80 Wind Tunnel, HTC-AD A, Hughes Tool Company-Aircraft Division, May Operators Manual, Helicopter Observation OH-6A, Headquarters Department of the. A r e v i e w of t h e h i s t o r i c a l development of Russian and Western helicopters, i n s i z e and l i f t capacity, f o r c i v i l and m i l i t a r y purposes i s followed by d e t a i l e d discussions on r o t o r aerodynamics f o r various angles of a t t a c k, blade s e t t i n g.

engineering design handbook helicopter engineering. part two detail design army materiel command, alexandria, january, reproduced from best available copy virginia amcpampit amcp '-engineering design handbook helicopter engineerin\ part two detai l design.