Results 31 to 40 of about 95,004 (291)

Error Uncertainty Analysis in Planar Closed-Loop Structure with Joint Clearances

open access: yesMetals, 2021
For planar closed-loop structures with clearances, the angular and positional error uncertainties are studied. By using the vector translation method and geometric method, the boundaries of the errors are analyzed.
Yushu Yu, Jinglin Li, Xin Li, Yi Yang
doaj   +1 more source

Clearance of proteoglycan from joint cavities. [PDF]

open access: yesAnnals of the Rheumatic Diseases, 1987
The rate of loss from the synovial cavity of proteoglycan subunit, a major constituent of cartilage, has been measured in rabbits with and without experimental arthritis. The effect of aggregation between proteoglycan and hyaluronic acid upon the rate of elimination has also been investigated.
D P, Page-Thomas   +3 more
openaire   +2 more sources

Identifying joint clearance via robot manipulation [PDF]

open access: yes, 2017
Inaccuracy in robot manipulation is a result of various uncertainties. Most methods reduce operation errors by calibrating robot parameters, with little attention on understanding the uncertainty sources in the process.
Kuan-Lin Li   +2 more
core   +1 more source

Sagittal plane joint angles and contributions to paretic toe clearance. [PDF]

open access: yes, 2014
Healthy controls are depicted in the left and participants post-stroke in the right column. (a and b) Sagittal plane joint angles. Vertical cursor lines in represent toe off (dashed), minimal toe clearance (1st solid), and maximal limb shortening (2nd ...
Carolynn Patten (645959)   +2 more
core   +1 more source

Tribological behaviors of Ni-modified citric acid carbon quantum dot particles as a green additive in polyethylene glycol

open access: yesFriction, 2019
A novel green lubricating oil additive (carbon quantum dot (CQD) particle-doped nickel (Ni-CQD)) was synthesized from citric acid and nickel acetate. The effects of CQD and Ni-CQD nanoparticles on the tribological behaviors of polyethylene glycol (PEG200)
Zhiqiang Tu   +8 more
doaj   +1 more source

Dynamics and Wear Prediction of Mechanisms Considering Multiple Clearances and Coatings

open access: yesLubricants, 2023
The increase in joint clearance and system vibration caused by joint wear are important factors that may lead to the failure of the mechanism and a decrease in the motion accuracy of the actuator.
Qian Jing, Hongzhao Liu
doaj   +1 more source

Minimise joint clearance in rapid fabrication of non-assembly mechanisms [PDF]

open access: yes, 2011
Layer-based rapid fabrication technologies have two distinct advantages: (1) build parts without geometry restriction; (2) build sub-systems (static or mobile) without the need for assembly.
Yonghua Chen, Lu, J, Chen, Y, Jianan Lu
core   +1 more source

Dynamic response analysis for multi-degrees-of-freedom parallel mechanisms with various types of three-dimensional clearance joints

open access: yesInternational Journal of Advanced Robotic Systems, 2021
For spatial multibody systems, the dynamic equations of multibody systems with compound clearance joints have a high level of nonlinearity. The coupling between different types of clearance joints may lead to abundant dynamic behavior.
Jia Yonghao, Chen Xiulong
doaj   +1 more source

Dynamic Analysis of a Spatial Mechanism Including Frictionless Spherical Clearance Joint With Flexible Socket [PDF]

open access: yes, 2017
In this paper, the dynamic response of a spatial four-bar mechanism with a spherical clearance joint with flexible socket is investigated. Previous research treats the socket as a whole rigid part and neglects the flexibility of the socket.
Guofeng Yao, Jianhong Hou, Huili Huang
core   +1 more source

Nonlinear Dynamics and Control of Crank-Slider Mechanism with Multiple Clearance Joints [PDF]

open access: yesJournal of Theoretical and Applied Vibration and Acoustics, 2015
In the current study, behavior of crank-slider mechanism with single and multiple clearance joints are analyzed. Using Lankarani-Nikravesh theory for estimating discontinuous contact forces in clearance joints, relevant systems have been mathematically ...
Morteza Dardel   +3 more
doaj   +1 more source

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