Results 81 to 90 of about 19,992 (292)

TreeSpider: In‐Canopy Exploration With Tether‐Based Aerial Modular Arms

Advanced Robotics Research, EarlyView.
A tethered drone with perching arms and a 360° ring enables unprecedented maneuverability within dense forest canopies. By dynamically adjusting tether length and decoupling pitch from the frame, it navigates between branches, senses multiple trees, and interacts physically with foliage.
Luca Romanello, Tian Lan, Salaheldin Hassan, Maximilian Leutschafft, Erdem Ekinci, Sophie F. Armanini, Mirko Kovac, Basaran Bahadir Kocer   +7 more
wiley   +1 more source

Stick-Slip Vibration Suppression in Drill String Using Observer-Based LQG Controller. [PDF]

Sensors (Basel), 2022
Riane R, Doghmane MZ, Kidouche M, Tee KF, Djezzar S.   +4 more
europepmc   +1 more source

A new approach to model tyre/road contact [PDF]

, 2006
In the Structural Dynamics and Acoustics group at the University of Twente, we aim to develop a quantitative tyre/road noise model. An essential part of this model is an accurate contact algorithm which is fast enough to simulate tyre vibrations up to ...
Boer, A. de, Wijnant, Y.H.
core   +1 more source

Reversing a granular flow on a vibratory conveyor

, 2003
Experimental results are presented on the transport properties of granular materials on a vibratory conveyor. For circular oscillations of the shaking trough a non-monotonous dependence of the transport velocity on the normalized acceleration is observed.
C. A. Kruelle, I. Rehberg, M. Rouijaa, P. Walzel, R. Grochowski, Rademacher F. J. C., Rademacher F. J. C.   +6 more
core   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

Stick-Slip Vibration Analysis and Drilling Parameter Optimization of Horizontal Well Drill String System

Shiyou jixie
Stick⁃slip vibration is one of the main vibration forms in the process of horizontal well drilling， and usually leads to adverse consequences such as reduction of bit cutting efficiency and failure of drilling tools.
Li Wenzhe, Wu Jie, Xia Lianbin, Xu Weining, Luo Yueyao, Liu Yuan   +5 more
doaj  

The effect of high-frequency torsional impacts on the dynamic response of a drill string in a stick state

Advances in Mechanical Engineering, 2019
Stick–slip vibration is common in the oil well drilling process and is detrimental to down-hole equipment and drilling efficiency. In recent years, a new type of drilling technology, torsional impact drilling, has been developed to mitigate the stick ...
Liping Tang, Wei He, Xiaohua Zhu
doaj   +1 more source

Stick-slip vibration characteristics of drilling tool during drilling in coal seam with gangue. [PDF]

Sci Prog, 2022
Han X, Li P, Xue L, Xu J.
europepmc   +1 more source

A dynamic tactile sensor on photoelastic effect

, 2006
Certain photoelastic materials exhibit birefringent characteristics at a very low level of strain. This property of material may be suitable for dynamic or wave propagation studies, which can be exploited for designing tactile sensors.
Crowder, Richard, Dubey, Venketesh
core   +1 more source

A Superlubricated Magnetically Steerable Microcatheter with Integrated Optical and Fluidic Channels

Advanced Robotics Research, EarlyView.
A magnetically steerable microcatheter with integrated optical and fluidic channels is developed for multifunctional navigation in tortuous anatomical environments. A surface‐grafted hydrogel coating enables low‐friction actuation. The device demonstrates stable light and fluid delivery during magnetic manipulation, offering a compact platform for ...
Yuntian Du, Ruokun He, Luqi Li, Hesheng Wang, Zhuo‐Chen Ma, Bing Han   +5 more
wiley   +1 more source