Results 141 to 150 of about 539,294 (205)

Dynamic surface control with a nonlinear disturbance observer for multi‐degree of freedom underactuated mechanical systems

International Journal of Robust and Nonlinear Control, 2022
Underactuated systems are extensively utilized in practice while attracting a huge deal of attention in theoretical studies. There are few robust control strategies for general underactuated systems because of the variety of their dynamic models.
Feng Ding, Jian Huang, Wen-Xia Xu, Chenguang Yang, Chong Sun, Yong Ai   +5 more
semanticscholar   +1 more source

Numerical investigation on two-degree-of-freedom vortex-induced vibration of a circular cylinder in power-law fluids

Journal of Non-Newtonian Fluid Mechanics, 2021
In this paper, the two-degree-of-freedom (2DOF) vortex-induced vibration (VIV) of a circular cylinder in shear-thinning and shear-thickening non-Newtonian power-law fluids are numerically investigated.
A. Ashouri, E. Izadpanah, M. Hekmat, Y. Amini   +3 more
semanticscholar   +1 more source

Structure Synthesis and Reconfiguration Analysis of Variable-Degree-of-Freedom Single-Loop Mechanisms With Prismatic Joints Using Dual Quaternions

Journal of Mechanisms and Robotics, 2021
This paper deals with the structure synthesis and reconfiguration analysis of variable-DOF (variable-degree-of-freedom) single-loop mechanisms with prismatic joints based on a unified tool—the dual quaternion.
Kai Liu, Jingjun Yu, X. Kong
semanticscholar   +1 more source

7 degree-of-freedom neuroprosthetic control by an individual with tetraplegia

The Lancet, 2013
SUMMARY Background We use our arms to transport and orient the hand which is used to grasp and manipulate objects. Upper limb paralysis or amputation limits a person’s ability to interact with their environment to accomplish activities of daily living ...
J. Collinger, B. Wodlinger, J. Downey, Wei Wang, E. Tyler-Kabara, D. Weber, Angus J. C. McMorland, M. Velliste, M. Boninger, A. Schwartz   +9 more
semanticscholar   +1 more source

Insights into instability of friction-induced vibration of multi-degree-of-freedom models

Journal of Sound and Vibration, 2021
This study addresses a fundamental problem of linear friction-induced vibration (FiV), the intriguing role of damping on the instability of FiV in the form of mode-coupling.
Zilin Li, H. Ouyang, Zon-Han Wei
semanticscholar   +1 more source

Degrees of freedom of turbulence

Physical Review A, 1987
We compute in the framework of a multifractal model for three-dimensional fully developed turbulence the number of degrees of freedom N as function of the Reynolds number R. $N--- depends on the whole spectrum of singularities h related to the anomalous scaling of the velocity differences.
, Paladin, , Vulpiani
openaire   +2 more sources

An improved method for bandgap calculation of a locally resonant plate with multi-periodic of multiple degree-of-freedom resonators

Journal of Applied Physics, 2021
An improved plane wave expansion (PWE) method is developed based on the governing equations of a lattice unit cell, providing support for calculating the band structures of a locally resonant (LR) plate with multiple arrays of multiple degree-of-freedom ...
Qiaojiao Li, M. Sheng
semanticscholar   +1 more source

Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer

Frontiers of Information Technology & Electronic Engineering, 2021
Representation of orientation is important in a six-degree-of-freedom grating interferometer but only a few studies have focused on this topic. Roll-pitch-yaw angles, widely used in aviation, navigation, and robotics, are now being brought to the field ...
Di Chang, P. Hu, Jiubin Tan
semanticscholar   +1 more source

Polarization degrees of freedom

2008 IEEE International Symposium on Information Theory, 2008
This paper unifies the different conclusions on the polarization degrees of freedom in multiple-antenna channels. It shows that the multiplicative gain in the degrees of freedom from polarization depends on the array geometry and the scattering condition.
Ada S. Y. Poon, David N. C. Tse
openaire   +1 more source

Distances as Degrees of Freedom

Journal of Biomolecular Structure and Dynamics, 1989
Tertiary contact distance information of varying resolution for large biological molecules abounds in the literature. The results provided herein develop a framework by which information of this type can be used to reduce the allowable configuration space of a macromolecule. The approach combines graph theory and distance geometry.
M A, Hadwiger, G E, Fox
openaire   +2 more sources