Results 101 to 110 of about 14,096,944 (291)

Friction Observer and Compensation for Control of Robots with Joint Torque Measurement [PDF]

, 2008
In this paper we introduce a friction observer for robots with joint torque sensing (in particular for the DLR medical robot) in order to increase the positioning accuracy and the performance of torque control.
Hirzinger, Gerd, Albu-Schäffer, Alin Olimpiu, Alessandro De Luca, Le-Tien, Luc, A. Albu Schaeffer, Alin Albu-Schaffer, Gerd Hirzinger, L. Le Tien, G. Hirzinger, De Luca, Alessandro, Luc Le Tien   +10 more
core   +1 more source

Experimental and System-Level Simulation Study of Stick–Slip Characteristics in Pneumatic Cylinders

Actuators
This paper presents a comprehensive experimental and simulation study on the stick–slip characteristics of pneumatic cylinders operating at low velocities.
Hai Nguyen Ngoc, Phu Phung Pham, Bo Tran Xuan   +2 more
doaj   +1 more source

Development of a Novel Friction Model for Machining Simulations in Unidirectional Composite Materials. [PDF]

Polymers (Basel), 2022
Seward O, Cepero-Mejías F, Fairclough JPA, Kerrigan K.   +3 more
europepmc   +1 more source

Additive Manufacturing of Alumina‐Reinforced Elastomers

Advanced Engineering Materials, EarlyView.
Vat‐photopolymerized elastomers reinforced with platelet‐shaped alumina exhibited preferential orientation, reduced porosity, and significantly enhanced mechanical performance. A 3 wt% platelet loading increased tensile strength from 12.4 to 45.7 MPa, highlighting the critical role of filler morphology in elastomeric VPP composites.
Majid Barzegar Keyvani, Zongwen Fu, Robert Göstl, Hamed Shokri, Carmine Putignano, Gianluca Percoco, Bilal Gökce   +6 more
wiley   +1 more source

Shock isolation systems incorporating Coulomb friction

, 2012
This study investigates a novel approach to the problem of shock isolation. The questions considered are whether friction produces a better performance in terms of reduced response during a shock compared to viscous damping and a lower residual response ...
Ismail, Mohd
core   +1 more source

A Static Friction Model for Unlubricated Contact of Random Rough Surfaces at Micro/Nano Scale. [PDF]

Micromachines (Basel), 2021
Zhu S, Ni L.
europepmc   +1 more source

Superlubricity and Corrosion Inhibition Properties of Solvate Ionic Liquids in Hybrid Carbon Fiber Reinforced Plastic–Steel Interfaces

Advanced Engineering Materials, EarlyView.
Solvate ionic liquids lubrication reduced the coefficient of friction by ∼60% compared to dry sliding, reaching steady‐state values as low as 0.04–0.05. Corrosion weight‐loss measurements in 1 M HCl further demonstrated significant inhibition behavior, with only 100 ppm of [Li(G3)][TFSI] (∼68.5 μL/L) reducing corrosion‐product weight loss by 63 ...
Sameh Dabees, Timothy Harte, Bhagya Dharmasiri, Y. Athulya Wickramasingha, David J. Hayne, Daniel J. Eyckens, Luke C. Henderson   +6 more
wiley   +1 more source

Discrepancies Between Micro Versus Macroscale Viscoelastic Properties in a Microplastic‐Tissue Composite Model

Advanced Engineering Materials, EarlyView.
This study explores the discrepancies between bulk mechanics and spatial mapping in a tissue‐mimetic hydrogel model. Microplastic particles create localized stiff mechanical microenvironments that are detectable by cellular‐scale nanoindentation but leave bulk properties unchanged as measured by rheology.
Ahron T. Verschleisser, Baptiste Le Roi, Omri Leshem, Joshua M. Grolman   +3 more
wiley   +1 more source

A predictive model of energy savings from top of rail friction control [PDF]

, 2014
In this paper the authors present a predictive model of train energy requirements due to the application of a top of rail friction modifier (TOR-FM) versus dry wheel / rail conditions. Using the VAMPIRE® Pro simulation package, train energy requirements
VanderMarel, Joel, Eadie, Donald T., Oldknow, Kevin D., Iwnicki, Simon   +3 more
core   +1 more source

Effect of Axial Vibration on Sliding Frictional Force between Shale and 45 Steel

Shock and Vibration, 2018
Activating drill string vibration is an effective means to mitigate the excessive drag encountered during drilling complex-structure wells. However, the Coulomb model cannot describe the sliding friction behavior between drill string and borehole rock ...
Wu Hao, Chen Ping, Liu Yang, Ma Tianshou
doaj   +1 more source