Results 61 to 70 of about 88,667 (317)

Accurate one dimensional beam modeling method for a rotor shaft with stepped cross-sections in the finite element method

Nihon Kikai Gakkai ronbunshu, 2014
The bending stiffness at the stepped cross-section of a rotor decreases in accordance with the elasticity in the face of the cross-section. This study proposes a method to deal with this decrease in bending stiffness in one dimensional (1D) beam modeling.
Nobuaki NAGAE, Tomonobu GOTO
doaj   +1 more source

Chameleonic Color‐Variable Microbead Emitters for Multilevel Spectroscopic Encryption from Visible to Infrared Wavelengths

Advanced Optical Materials, EarlyView.
Whispering‐gallery‐mode microresonators with sharp resonant peaks enable photonic barcoding. Similar to a chameleon, a rare‐earth‐free microcavity with π‐conjugated PAHs enables visibleto‐near infrared color generation from a single microbead. The unique resonat emission (spectral barcode) can be dynamically transformed via excitation wavelength change,
Barun Kumar Barman, Keisuke Watanabe, Kenzo Deguchi, Shinobu Ohki, Kenjiro Hashi, Atsushi Goto, Tadaaki Nagao   +6 more
wiley   +1 more source

Design and Experimental Implementation of a Beam-Type Twin Dynamic Vibration Absorber for a Cantilevered Flexible Structure Carrying an Unbalanced Rotor: Numerical and Experimental Observations

Shock and Vibration, 2015
This paper presents experimental and numerical results about the effectiveness of a beam-type twin dynamic vibration absorber for a cantilevered flexible structure carrying an unbalanced rotor.
Abdullah Özer, Mojtaba Ghodsi, Akio Sekiguchi, Ashraf Saleem, Mohammed Nasser Al-Sabari   +4 more
doaj   +1 more source

Collision‐Resilient Winged Drones Enabled by Tensegrity Structures

Advanced Robotics Research, EarlyView.
Based on structures of birds such as the woodpeck, this article presents the collision‐resilient aerial robot, SWIFT. SWIFT leverages tensegrity structures in the fuselage and wings which allow it to undergo large deformations in a crash, without sustaining damage. Experiments show that SWIFT can reduce impact forces by 70% over conventional structures.
Omar Aloui, Raphael Zufferey, William Stewart, Mohammad Askari, Simon Jeger, Dario Floreano   +5 more
wiley   +1 more source

Modeling method of a rotor with interference fitting for accuracy improvement of lateral vibration analysis model for rotor-dynamics

Nihon Kikai Gakkai ronbunshu, 2015
This study will address the improvement of the analytical accuracy of a lateral vibration analysis model for rotor-dynamics. In case of predicting the lateral vibration of a rotor with disc elements fixed on the shaft by the interference fit, the ...
Nobuaki NAGAE, Tomoaki MURAYAMA, Seiichi YAMAJI, Tomonobu GOTO   +3 more
doaj   +1 more source

Development of flexible rotor balancing criteria [PDF]

Several studies in which analytical procedures were used to obtain balancing criteria for flexible rotors are described. General response data for a uniform rotor in damped flexible supports were first obtained for plain cylindrical bearings, tilting pad
Rieger, N. F., Walter, W. W.
core   +1 more source

Design and application of squeeze film dampers for turbomachinery stabilization [PDF]

, 1975
The steady-state transient response of the squeeze film damper bearing was investigated. Both the steady-state and transient equations for the hydrodynamic bearing forces are derived; the steady-state equations were used to determine the damper ...
Allaire, P. E., Barrett, L. E., Gunter, E. J.   +2 more
core   +2 more sources

Nonlocomotory Robotic Strategies for Dynamic Rotation Control in Terrestrial Robots: A Review

Advanced Robotics Research, EarlyView.
Terrestrial robots increasingly require rapid body rotation to maintain stability and agility in complex environments. This review shows nonlocomotory rotational control strategies that operate without ground contact, including reaction wheels, tails, bars, limbs, and thrusters.
Y. Liang, J. An, X. Zheng, D. Wang, S. Wang, X. Wang, P. Zhu, J. Pei, S. Li, J. Paripurana, Y. Han, Z. Tang, X. Gan, Q. He, X. Ma   +14 more
wiley   +1 more source

Research on additional damping control strategy of flexible distribution transformer

Frontiers in Energy Research
Disturbances to the power system may lead to relative swing between synchronous generator rotors, causing low-frequency oscillation problems in the absence of damping.
Guowei Guo, Jinfeng Wang, Ximei Zhan, Zhu Liu, Dehuang Gong, Aihong Tang, Yufei Shang, Zihan Wang   +7 more
doaj   +1 more source

Vibration and Control of Flexible Rotor Supported by Magnetic Bearings [PDF]

Active vibration control of flexible rotors supported by magnetic bearings is discussed. Using a finite-element method for a mathematical model of the flexible rotor, the eigenvalue problem is formulated taking into account the interaction between a ...
Nonami, Kenzou
core   +1 more source