Results 71 to 80 of about 636,815 (304)

Analysis and design of a capsule landing system and surface vehicle control system for Mars exploration [PDF]

Problems related to the design and control of a mobile planetary vehicle to implement a systematic plan for the exploration of Mars are reported. Problem areas include: vehicle configuration, control, dynamics, systems and propulsion; systems analysis ...
Frederick, D. K., Lashmet, P. K., Sandor, G. N., Shen, C. N., Smith, E. V., Yerazunis, S. W.   +5 more
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Robust hovering control of a quad tilt-wing UAV [PDF]

, 2010
This paper presents design of a robust hovering controller for a quad tilt-wing UAV to hover at a desired position under external wind and aerodynamic disturbances. Wind and the aerodynamic disturbances are modeled using the Dryden model.
Cetinsoy, Ertugrul, Hancer, Cevdet, Hançer, Cevdet, Oner, Kaan Taha, Sirimoglu, Efe, Sırımoğlu, Efe, Unel, Mustafa, Çetinsoy, Ertuğrul, Öner, Kaan Taha, Ünel, Mustafa   +9 more
core   +1 more source

Electrochemical Behavior of Flame‐Sprayed Sc‐Doped AlCoCrFeMo High‐Entropy Alloy Coatings in 3.5% Sodium Chloride Solution

Advanced Engineering Materials, EarlyView.
Scandium (Sc)‐doped AlCoCrFeMo HEA coatings are fabricated via flame spraying with 0.1, 0.3, and 0.5 wt% Sc additions. Among these, the HEA‐Sc0.3 coating exhibits the highest corrosion resistance, indicated by a more positive corrosion potential and lower current density.
Pankaj Kumar, Akash Vyas, Mohammad Aatif Qazi, Nashit Jalal, Maria Ophelia Jarligo, Mostafa Yakout, Jing Liu, André McDonald   +7 more
wiley   +1 more source

A Study on the Air Spring Suspension Morphologies of EMUs Bogie

机车电传动, 2013
Based on the pneumatic model of air spring and the dynamics MBS model of EMUs, the dynamics behaviors of EMUs in the2-point configuration and 4-point configuration were studied contrastively. What’s more, two improved suspension morphologies wereanalyzed,
QI Zhuang, LI Fu, SUN Shu-lei, HUANG Yun-hua, YU Da-lian   +4 more
doaj  

Printed Integrated Logic Circuits Based on Chitosan‐Gated Organic Transistors for Future Edible Systems

Advanced Functional Materials, EarlyView.
Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco, Valerio Francesco Annese, Valerio Galli, Ilaria Penna, Debora Russo, Marina Veronesi, Rita Scarpelli, Stefania Sabella, Mario Caironi   +8 more
wiley   +1 more source

Space Launch System Mobile Launcher Modal Pretest Analysis [PDF]

NASA is developing an expendable heavy lift launch vehicle capability, the Space Launch System, to support lunar and deep space exploration. To support this capability, an updated ground infrastructure is required including modifying an existing Mobile ...
Akers, James C., Sills, Joel W., Jr.
core   +4 more sources

Research on solving the equilibrium point of 5DOF vehicle dynamics system based on homotopy method

Scientific Reports
The vehicle dynamic equilibrium point is an important content in the analysis of vehicle handling stability. However, due to the strong nonlinearity of the vehicle dynamics system and the coupling between different degrees of freedom, the analytical ...
Shuming Shi, Boshi Zhang, Zehui Ma, Qingchen Cheng, Guanghui Chen, Nan Lin   +5 more
doaj   +1 more source

Coupled Dynamics Modeling and Validation of Maglev Vehicle and Bridge Systems

Actuators
To address the vehicle-bridge coupling vibration issue of the Qingyuan Maglev Tourist Line, it is necessary to establish a maglev vehicle–bridge coupling dynamics simulation model that reflects the actual line conditions.
Fei Zhou, Xiaolong Li
doaj   +1 more source

Dynamics and Control of a Maglev Vehicle [PDF]

Journal of Systemics, Cybernetics and Informatics, 2006
In this paper, dynamics of a Maglev vehicle was analyzed and controls utilizing an optimized damping and an LQR algorithms were designed to stabilize the vehicle.
Won ko
doaj