Results 81 to 90 of about 8,094 (226)

Helicopters as a Theme in a Machine Design Course [PDF]

, 2014
Helicopters as a Theme in Teaching Machine Design A machine design course is required in most undergraduate mechanical engineering curricula.This course generally covers an introduction to mechanical engineering design, a review of materials engineering,
Nagurka, Mark L., Turner, Devin
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Modeling for design simplification and power-flow efficiency improvement in an automotive planetary gearbox: A case example [PDF]

FME Transactions, 2020
An approach for design simplification and improvement in power-flow efficiency of an automotive planetary gearbox is presented in this article. Integrated CAD-CAE model, formed on stick diagram representation of geartrain operation, is developed for ...
Tamada Sireesha, Chandra Manish, Patra Prasenjit, Mandol Sourabh, Bhattacharjee Debraj, Dan Pranab K.   +5 more
doaj  

Comparison and Implementation of a Rigid and a Flexible Multibody Planetary Gearbox Model [PDF]

, 2014
We propose algorithms for developing (1) a rigid (constrained) and (2) a flexible planetary gearbox model. The two methods are compared against each other and advantages/disadvantages of each method are discussed.
Amirouche, F. M.L., Ascher, U.M. and Petzold, L.R., Bae, D. and Haug, E., Gear, C., Geradin, M. and Cardona, A., Hairer, E. and Wanner, G., Hansen, A.M., Rasmussen, F., and Larsen, T.J., Haug, E.J., Huston, R.L. and Wang, Y., Jalon, J. G.d., Bayo, E., and Bahar, L.Y., Jens Nørkær Sørensen, Jørgensen, M.F., Pedersen, N.L., Sørensen, J.N., and Paulsen, U.S., Klit, P., Casper, K., and Pedersen, N.L., Martin Felix Jørgensen, Multiphysics, C., Niels Leergaard Pedersen, Nikravesh, P.E., Pedersen, N.L. and Jørgensen, M.F., Rasmussen, F., Hansen, A.M., and Larsen, T.J., Shabana, A.A., Ziegler, P., Eberhard, P., and Schweizer, B., Øye, S.   +21 more
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Technology and benefits of aircraft counter rotation propellers [PDF]

Results are reported of a NASA sponsored analytical investigation into the merits of advanced counter rotation propellers for Mach 0.80 commercial transport application.
Bradley, E., Godston, J., Knip, G., Strack, W. C., Weisbrich, A. L.   +4 more
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Dynamics of a split torque helicopter transmission [PDF]

, 1992
A high reduction ratio split torque gear train has been proposed as an alternative to a planetary configuration for the final stage of a helicopter transmission. A split torque design allows a high ratio of power-to-weight for the transmission.
Krantz, Timothy, Rashidi, Majid
core   +2 more sources

A comparative study of the effectiveness of vibration and acoustic emission in diagnosing a defective bearing in a planetry gearbox [PDF]

, 2016
Whilst vibration analysis of planetary gearbox faults is relatively well established, the application of Acoustic Emission (AE) to this field is still in its infancy.
Al-Balushi, Al-Ghamd, Alan, Antoni, Antoni, Antoni, Antoni, Antoni, Barszcz, Bonnardot, Chaturved, Cotrell, Couturier, David Mba, Department for Transport, Douglas, Douglas, Duan Fang, Dwyer, Eftekharnejad, Eftekharnejad, Elasha, Elforjani, Elforjani, Faris Elasha, Ho, Holroyd, Huang, Kahraman, Khemili, Kilundu, Li, Lu, Lynwander, Makhoul, Martin, Matthew Greaves, Mba, Mba, McFadden, McFadden, McFadden, Mehala, Musial, Pickwell, Qu, Radzevich, Randall, Randall, Randall, Randall, Ruiz-Cárcel, Sait, Samuel, Satorius, Sawalhi, Sawalhi, Sikorska, Simon, Tan, Thakor, Wang, Wang, Wang, Wang, Widrow, Widrow, Yang, Yang, Yu   +69 more
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Application of Reassigned Wavelet Scalogram in Wind Turbine Planetary Gearbox Fault Diagnosis under Nonstationary Conditions

Shock and Vibration, 2016
Wind turbine planetary gearboxes often run under nonstationary conditions due to volatile wind conditions, thus resulting in nonstationary vibration signals. Time-frequency analysis gives insight into the structure of an arbitrary nonstationary signal in
Xiaowang Chen, Zhipeng Feng
doaj   +1 more source

Split torque transmission load sharing [PDF]

Split torque transmissions are attractive alternatives to conventional planetary designs for helicopter transmissions. The split torque designs can offer lighter weight and fewer parts but have not been used extensively for lack of experience, especially
Kish, J. G., Krantz, T. L., Rashidi, M.
core   +1 more source

Циклоидальная планетарная трансмиссия [PDF]

, 2014
У статті представлена конструкція і принцип дії циклоїдальної планетарної передачі (редуктора). Передача поєднує в собі планетарні і паралельні механізми. Планетарний механізм утворює систему планетарних передач і роликів, які забезпечують функціонування
Bednarczyk, Sławomir, Беднарчук, С.   +1 more
core  

Low-noise, high-strength, spiral-bevel gears for helicopter transmissions [PDF]

Improvements in spiral-bevel gear design were investigated to support the Army/NASA Advanced Rotorcraft Transmission program. Program objectives were to reduce weight by 25 percent, reduce noise by 10 dB, and increase life to 5000 hr mean-time-between ...
Handschuh, Robert F., Henry, Zachary S., Lewicki, David G., Litvin, Faydor L.   +3 more
core   +1 more source