Results 71 to 80 of about 2,182,834 (296)

Wigner rotation and Euler angle parametrization

American Journal of Physics, 2023
Analogous to the famous Euler angle parametrization in three-dimensional Euclidean space, a reflection-free Lorentz transformation in (2 + 1)-dimensional Minkowski space can be decomposed into three simple parts. Applying this decomposition to the Wigner rotation problem, we are able to show that the related mathematics becomes much simpler and the ...
openaire   +2 more sources

Hard‐Magnetic Soft Millirobots in Underactuated Systems

Advanced Robotics Research, EarlyView.
This review provides a comprehensive overview of hard‐magnetic soft millirobots in underactuated systems. It examines key advances in structural design, physics‐informed modeling, and control strategies, while highlighting the interplay among these domains.
Qiong Wang, Zixuan Zhang, Bingyan Li, Junkai Wang, Hongcheng Gu   +4 more
wiley   +1 more source

Reply to Bektaş, S. Comment on “Ioannidou, S.; Pantazis, G. Helmert Transformation Problem. From Euler Angles Method to Quaternion Algebra. ISPRS Int. J. Geo-Inf. 2020, 9, 494”

ISPRS International Journal of Geo-Information
The comment disputes some of the inferences in the paper “Helmert Transformation Problem. From Euler Angles Method to Quaternion Algebra”, published in this journal. The key points in the dissent are the following: (1) The number of unknown parameters in
George Pantazis, Stefania Ioannidou
doaj   +1 more source

A Review on Sensor Technologies, Control Approaches, and Emerging Challenges in Soft Robotics

Advanced Robotics Research, EarlyView.
This review provides an introspective of sensors and controllers in soft robotics. Initially describing the current sensing methods, then moving on to the control methods utilized, and finally ending with challenges and future directions in soft robotics focusing on the material innovations, sensor fusion, and embedded intelligence for sensors and ...
Ean Lovett, Maxwell Hammond, Niloufar Seyfi, Amirreza Fahim Golestaneh, Venanzio Cichella, Caterina Lamuta   +5 more
wiley   +1 more source

Сalculation and analysis of characteristic point trajectories for planetary bevel gears with precessing satellites [PDF]

Научно-технический вестник Брянского государственного университета
The article talks about research on the kinematics of precessing gears. The possible ways of precession generation based on the patent database are listed. A range of gearboxes with single-stage gears has been defined.
Vinnik P.M., Kudryavtsev A.V., Petukhov-Pokrovsky R.A.   +2 more
doaj   +1 more source

Continuum Mechanics Modeling of Flexible Spring Joints in Surgical Robots

Advanced Robotics Research, EarlyView.
A new mechanical model of a tendon‐actuated helical extension spring joint in surgical robots is built using Cosserat rod theory. The model can implicitly handle the unknown contacts between adjacent coils and numerically predict spring shapes from straight to significantly bent under actuation forces.
Botian Sun, Liang Zhang, Jianwen Zeng, Xuefeng Wang   +3 more
wiley   +1 more source

Numerical Modeling of Photothermal Self‐Excited Composite Oscillators

Advanced Robotics Research, EarlyView.
We present a numerical framework for simulating photothermal self‐excited oscillations. The driving mechanism is elucidated by highlighting the roles of inertia and overshoot, as well as the phase lag between the thermal moment and the oscillation angle, which together construct the feedback loop between the system state and the environmental stimulus.
Zixiao Liu, Ryan R. Rusch, Zheng Wu, Chi Chen, Pengju Shi, Hao Qiu, Ximin He   +6 more
wiley   +1 more source

In-flight calibration of the fluxgate magnetometer on Macau Science Satellite-1

Earth and Planetary Physics
High-precision magnetic field measurements are crucial for understanding Earth’s internal structure, space environment, and dynamic geomagnetic variations.
YiXin Qiu, Ying Zhang, YaSong Ge, AiMin Du, ShuQuan Sun, Lin Zhao, Hao Luo, Lei Wang, Lin Tian, Zhi Li, Xiao Feng   +10 more
doaj   +1 more source

Dynamic control method of particle distribution uniformity in the rolling circulating fluidized bed (RCFB)

Engineering Applications of Computational Fluid Mechanics, 2021
This paper mainly proposed a dynamic control method of particle distribution uniformity in a rolling circulating fluidized bed (RCFB) by using an air distribution plate. An Euler–Euler numerical simulation approach which is called two-fluid flow model is
Tong Zhao, Xingwan Ding, Zhilong Wang, Yanchao Zhang, Kai Liu   +4 more
doaj   +1 more source

Path integral Monte Carlo simulations for rigid rotors and their application to water

, 2010
In this work the path integral formulation for rigid rotors, proposed by M\"user and Berne [Phys. Rev. Lett. {\bf 77}, 2638 (1996)], is described in detail. It is shown how this formulation can be used to perform Monte Carlo simulations of water.
Allen MP, Bunker PR, Callen HB, Carl McBride, Carlos Vega, Eva G. Noya, Feynman RP, Franks F, Gray CG, Levine IN, Levine IN, Luis M. Sesé, Maria M. Conde, McQuarrie DA, Rafael Ramírez, Zare RN, Zare RN   +16 more
core   +1 more source