Results 21 to 30 of about 149,089 (310)

Analysis of the Dynamic Stiffness, Hysteresis Resonances and Complex Responses for Nonlinear Spring Systems in Power-Form Order

open access: yesApplied Sciences, 2021
Power-form nonlinear contact force models are widely adopted in relatively moving parts of macro (e.g., rolling bearings considering Hertzian contact restoring force between rolling elements and bearing raceways) or micro (e.g., the micro cantilever ...
Qingtao Wang   +3 more
doaj   +1 more source

GRID-FORMING/FOLLOWING CONTROL FOR CONVERTERS OF RENEWABLE ENERGY SOURCES

open access: yesТехнічна електродинаміка, 2021
Have been proposed the new control framework for converters of renewable energy sources (RES-C), based on choosing their operation mode – grid-forming or grid-following in depends on the dynamic stiffness (DS) of the power system for some bus i (control ...
О. Агамалов
doaj   +1 more source

Dynamic phototuning of 3D hydrogel stiffness [PDF]

open access: yesProceedings of the National Academy of Sciences, 2015
Significance Extracellular matrix (ECM) stiffness is an influential factor in many biological processes. Temporal changes in ECM stiffness are observed in cancer, cardiovascular disease, and wound healing, and are likely involved in disease progression.
Ryan S, Stowers   +2 more
openaire   +2 more sources

Influence of different loads on the properties of lightweight composite

open access: yesJournal of Civil Engineering and Management, 2012
The paper describes the study on the operational properties of lightweight composite with density of 150–350 kg/m3. It was established that these properties depend on the ratio of porous cement matrix and inclusions of crushed expanded polystyrene ...
Modestas Kligys   +4 more
doaj   +1 more source

Parameter Identification and Dynamic Characteristic Research of a Fractional Viscoelastic Model for Sub-Frame Bushing

open access: yesVehicles, 2023
This research focused on the rubber bushings of the rear sub-frame in an electric vehicle. A dynamic model was developed to represent the bushing, incorporating an elastic element, a frictional element, and a viscoelastic element arranged in series using
Bao Chen   +5 more
doaj   +1 more source

Dynamic axial contact stiffness analysis of position preloaded ball screw mechanism

open access: yesAdvances in Mechanical Engineering, 2019
This article establishes an axial contact stiffness model of position preloaded ball screw mechanism based on Hertz contact theory. The analysis of dynamic axial contact stiffness is one of the foundations of the research on the dynamic characteristic of
Jun Liu, Yi Ou
doaj   +1 more source

Self-Locking Avoidance and Stiffness Compensation of a Three-Axis Micromachined Electrostatically Suspended Accelerometer

open access: yesSensors, 2016
A micromachined electrostatically-suspended accelerometer (MESA) is a kind of three-axis inertial sensor based on fully-contactless electrostatic suspension of the proof mass (PM).
Yonggang Yin, Boqian Sun, Fengtian Han
doaj   +1 more source

Joint Stiffness Identification of a Heavy Kuka Robot with a Low-cost Clamped End-effector Procedure

open access: yes, 2014
This paper proposes two new methods for the identification of static stiffnesses of multi degrees of freedom heavy industrial robots. They are based on a locked link joint procedure obtained with an end-effector fixed to the environment. The first method
JUBIEN, Anthony   +5 more
core   +2 more sources

Analysis of Frictional Effects on the Dynamic Response of Gear Systems and the Implications for Diagnostics [PDF]

open access: yes, 2015
To develop accurate diagnostic techniques, this study examines gear dynamic responses based on a model including the frictional effect of tooth mesh process.
Gu, Fengshou   +8 more
core   +1 more source

Dynamic Stiffness Effect of Mechanical Components on Gear Mesh Misalignment

open access: yesApplied Sciences, 2018
In this work, we propose a method that considers the dynamic elastic stiffness of mechanical components in a quasi-static condition, and we investigate this parameter’s effect on gear mesh misalignment.
Jin-Gyun Kim   +4 more
doaj   +1 more source

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