Results 41 to 50 of about 497 (184)
Vibration analysis of elevator rope with one vibration suppressor
Nihon Kikai Gakkai ronbunshu, 2018 When an elevator rope for a high-rise building is forcibly excited by the displacements of the building induced by wind forces and/or by long-period ground motion, rope displacement becomes large even if the ground acceleration and the buildings ...
Takahiro FUJITANI, Hiroyuki KIMURA
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Lyapunov-Based Control of the Sway Dynamics for Elevator Ropes with Time-Varying Lengths
IFAC Proceedings Volumes, 2014 In this work we study the problem of rope sway dynamics control for elevator systems, with time-varying rope lengths. We formulate this problem as a nonlinear control problem and propose nonlinear controllers based on Lyapunov theory for time-varying systems. We study the stability of the proposed controllers, and test their performances on a numerical
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Aftasten/Tantear: A sensorial, coalitional wayfinding among Muslim runners
Feminist Anthropology, EarlyView.Abstract Muslim recreational runners in Muslim‐minority settings that take up running as their preferred form of leisure indicate that they feel they have to navigate a sense of exclusion when running outdoors. This article explores the process of exploration and sensing in public, represented by the Dutch verb aftasten, to investigate the way Muslim ...
Jasmijn Rana
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Nihon Kikai Gakkai ronbunshuDuring an earthquake, elevator operation is restricted by controlled operation because the elevator ropes resonate with the building sway. In this paper, based on the assumption that the elevator can operate even in the event of an earthquake if the ...
Ryoji NAKANISHI +4 more
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Nihon Kikai Gakkai ronbunshu, 2019 Vibration suppressors are used to change the natural frequency of an elevator rope and prevent resonance. The displacement of the parts of the elevator rope at both the ends is small compared to that of the center part of the rope; therefore, it is not ...
Hiroyuki KIMURA, Masafumi KAMIYA
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Journal of Physics: Conference Series, 2019 Abstract The formulas for a complete analytical solution of the problem of moving cargo on a pendulum suspension of constant length along a given trajectory in a plane setting are presented. To set the desired trajectory as a time dependence of the linear horizontal coordinate of the cargo in a limited time interval, two-point Hermite ...
Mikhail S Korytov +2 more
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A novel approach for in situ benthic habitat characterization
Limnology and Oceanography: Methods, EarlyView.Abstract Habitat heterogeneity is a key driver of temporal and spatial variability of subtidal marine benthic biodiversity. However, this makes it a challenging environment in which to measure and quantify the factors driving biodiversity in a consistent manner.
Ryan J. W. Mathews +4 more
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MathematicsThis paper presents a constrained robust procedure for synthesizing fixed positive input shapers for a trolley–pendulum crane that accounts for motor dynamics, actuator lag, and PD trajectory tracking.
Rosen Mitrev, Dragan Marinkovic
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Nihon Kikai Gakkai ronbunshu, 2016 When an elevator rope for a high-rise building is forcibly excited by the displacements of the building induced by wind forces and/or by long-period ground motion, rope displacement becomes large even if the ground acceleration and the buildings ...
Hiroyuki KIMURA
doaj +1 more source
International Journal of Mechanical System Dynamics, EarlyView.ABSTRACT The rotor system of an electrically assisted turbocharger (EAT) is composed of multiple shaft components; The nonlinear connection and contact effects make it difficult to determine the system dynamic characteristics. To improve the modeling accuracy of EAT rotor system and evaluate the influence of contact between multi‐axis components and ...
Wenchao Liang +5 more
wiley +1 more source