Results 31 to 40 of about 307,462 (308)
Sensors, 2023 Traditional stiffness modeling methods do not consider all factors comprehensively, and the modeling methods are not unified, lacking a global stiffness model.
Sen Wang +5 more
doaj +1 more source
Dynamic Modeling and Simulation of a Rotating Single Link Flexible Robotic Manipulator Subject to Quick Stops [PDF]
, 2014 Single link robotic manipulators are extensively used in industry and research operations. The main design requirement of such manipulators is to minimize link dynamic deflection and its active end vibrations, and obtain high position accuracy during its
Dupac, Mihai, Noroozi, Siamak
core +1 more source
A study on dynamics of mechanical systems including joints with clearance and lubrication [PDF]
, 2006 In this work a methodology for the dynamical analysis of mechanical systems considering realistic joint characteristics, namely, joints with clearance and lubrication is presented. For the case of the joints with clearance modelled as a contact pair with
Ambrósio, Jorge +4 more
core +1 more source
IEEE Access, 2023 The existing clearance in the mechanical joints plays a crucial role in the assembly of mechanical systems, allowing the mobility of its components. However, few studies have explored models that consider joint clearance in the case of electromechanical ...
Ludwin Molina Arias +2 more
doaj +1 more source
Experimental and Numerical Analysis of the Flow Inside a Configuration Including an Axial Pump and a Tubular Exchanger [PDF]
, 2010 In centrifugal and axial pumps, the flow is characterized by a turbulent and complex behavior and also by physical mechanisms such as cavitation and pressure fluctuations that are mainly due to the strong interactions between the fixed and mobile parts ...
BAKIR, Farid +3 more
core +5 more sources
The Effects of Joint Clearance on the Dynamics of the 3-RPR Planar Parallel Manipulator [PDF]
International Journal of Advanced Design and Manufacturing Technology, 2018 In reality, clearances in the joints are inevitable due to the defects arising from manufacturing process, design tolerances, and wearing after a certain working period.
Seyyed Mojtaba Varedi-Koulaei +1 more
doaj
Cycle-to-cycle control of swing phase of paraplegic gait induced by surface electrical stimulation [PDF]
, 1995 Parameterised swing phase of gait in paraplegics was obtained using surface electrical stimulation of the hip flexors, hamstrings and quadriceps; the hip flexors were stimulated to obtain a desired hip angle range, the hamstrings to provide foot ...
Baardman, G. +4 more
core +3 more sources
Nonlinear Characteristics of Revolute Joints with Clearance
Journal of Aerospace Technology and Management, 2013 http://dx.doi.org/10.5028/jatm.v5i3.236 The nonlinear contact characteristic of revolute joint with clearance can degrade the performance of deployable structure. In this article, tensile and compressive tests are adopted to investigate the accuracies of the simplest conformal model and nonconformal model for contact, which are used to calculate the ...
Rong-qiang, Liu +3 more
openaire +5 more sources
Dynamics Analysis of Spatial Parallel Mechanism with Irregular Spherical Joint Clearance
Shock and Vibration, 2019 Clearances caused by machining accuracy and assembly requirements are regular, but they will be irregular due to the wear of the kinematic pairs. At present, there are few studies on wear of space kinematic pairs.
Xiulong Chen, Yuewen Li
doaj +1 more source
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source