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Junfeng Liu, Yujun Hu, Ji Yao and Qing Zhang
Tuned mass dampers (TMDs) are widely used as vibration damping devices in engineering practice. However, during use, TMDs inevitably exhibit some nonlinear characteristics that may negatively impact engineering applications. To improve the practical perf...
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Yujun Hu, Ji Yao, Junfeng Liu and Qing Zhang
The use of this analytical method can improve the damping performance of tuned mass dampers, which has a certain reference value in the subsequent study of TMD nonlinear characteristics, and the analytical method has some significance for improving the e...
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Luís M. B. C. Campos and Paulo J. S. Gil
The two dimensional gravity turn problem is addressed allowing for the effects of variable rocket mass due to propellant consumption, thrust and thrust vector angle, lift and drag forces at an angle-of-attack and atmospheric mass density varying with alt...
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Anyuan Bi, Fengye Zhao, Xiantao Zhang and Tong Ge
Autonomous underwater vehicles (AUVs) are increasingly being applied to highly detailed survey and inspection tasks over large ocean regions. These vehicles are required to have underwater hovering and low-speed cruising capabilities, and energy-saving p...
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Luís M. B. C. Campos and Paulo J. S. Gil
The calculation of rocket trajectories is most often performed using purely numerical methods that account for all relevant parameters and provide the required results. There is a complementary need for analytical methods that make more explicit the effe...
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Luís M. B. C. Campos and Paulo J. S. Gil
The calculation of rocket trajectories is most often performed using purely numerical methods that account for all relevant parameters and provide the required results. There is a complementary need for analytical methods that make more explicit the effe...
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A Abdullah, Mehtab Alam
Pág. 15 - 24
We have investigated the existence and stability of the libration points in the circular restricted three body problem with the variation of all the masses (primaries and infinitesimal body) with time. We have used the Meshcherskii transformation for fin...
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L. O. Manashkin,S. V. Myamlin
Pág. 70 - 78
A mathematical model of a draft gear for rail vehicles is suggested in the paper. Taking into consideration the temperature and other physical phenomena, which take place in the hydro-gaseous draft gears, is a basic peculiarity of the mathematical model.
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Yilin Dou, Kelei Wang, Zhou Zhou, Peter R. Thomas, Zhuang Shao and Wanshan Du
In recent years, the air-drop launch technology of near-space UAVs has attracted much attention. Between downfall from the carrier and the flight control system?s initiation, the UAV presents free-fall movement. This free-fall process is very important f...
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Francesco Bassi, Lorenzo Alessio Botti, Alessandro Colombo and Francesco Carlo Massa
Multi-component flow problems are typical of many technological and engineering applications. In this work, we propose an implicit high-order discontinuous Galerkin discretization of the variable density incompressible (VDI) flow model for the simulation...
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Un-Chang Jeong
The present study on vibration reduction in systems wherein the excitation frequency is variable designed and fabricated a magnetorheological elastomer (MRE)-based tunable dynamic vibration absorber and evaluated its performance in an experimental manner...
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Jae Kook Lee, Hankyu Yoo, Hoki Ban and Won-Jun Park
In multi-arch tunnels, the increased rock load on the concrete lining of the main tunnel and side walls due to the excavation of adjacent tunnels is critical and must be considered in the design stage. Therefore, this study estimates the rock load of a m...
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Jacopo Beretta, Andres Cardozo, Nicola Paletta, Antonio Chiariello and Marika Belardo
The T-WING project, a CS2-CPW (Clean Sky 2 call for core partner waves) research initiative within FRC IADP (Fast Rotor-Craft Innovative Aircraft Demonstrator Platform), focuses on developing, qualifying and testing the new wing of the Next-Generation Ci...
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Marco Menegozzo, Andrés Cecchini, Ryan Christian Ogle, Uday Kumar Vaidya, Isaac Acevedo-Figueroa and Jaine A. Torres-Hernández
Honeycomb cores are widely used in the aerospace and automotive fields as a part of protective structures. Unfortunately, standard prismatic honeycomb cores offer a limited amount of energy absorption under lateral loads and suffer from degradation of th...
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Wenfeng Xu, Yinghui Li, Binbin Pei and Zhilong Yu
This work develops a morphing decision strategy to optimize the cruising efficiency for a variable-sweep morphing aircraft, and a simple and practical guidance and control system is given as well. They can work in tandem to accomplish a cruise mission ef...
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Fuming Xia, Bo Jing and Wenfeng Xu
This work investigates the short-term dynamics caused by shape changes of morphing aircraft. We select a symmetric variable sweep morphing aircraft as the object of study and establish a six-degree-of-freedom multi-loop cascade model, and the coupling be...
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Weston P. Buchanan, Maxim de Jong, Rachana Agrawal, Janusz J. Petkowski, Archit Arora, Sarag J. Saikia, Sara Seager, James Longuski and on behalf of the Venus Life Finder Mission Team
Mounting evidence of chemical disequilibria in the Venusian atmosphere has heightened interest in the search for life within the planet?s cloud decks. Balloon systems are currently considered to be the superior class of aerial platform for extended atmos...
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Martina Ricci, Stefano Gino Mosele, Marcello Benvenuto, Pio Astrua, Roberto Pacciani and Michele Marconcini
The increasing introduction of renewable energy capacity has changed the perspective on the operation of conventional power plants, introducing the necessity of reaching extreme off-design conditions. There is a strong interest in the development and opt...
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Jen-Yi Chang and Chia-Cheng Tsai
In this study, the scattering of oblique water waves by multiple variable porous breakwaters near a partially reflecting wall over uneven bottoms are investigated using the eigenfunction matching method (EMM). In the solution procedure, the variable brea...
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Shun Ito, Kazuki Miyakoshi, Hidetoshi Oya, Yoshikatsu Hoshi, Shunya Nagai
Pág. 234 - 246
In this paper, for multi-agent systems (MASs) with leader-follower structures, we present a linear matrix inequality (LMI)-based design method of an adaptive gain controller considering relative distances between agents. The proposed adaptive gain contro...
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