Results 21 to 30 of about 3,723 (258)

Precision contouring control of five degree of freedom robot manipulators with uncertainty

open access: yesInternational Journal of Advanced Robotic Systems, 2016
In this article, we apply a result in equivalent errors to a contouring control problem of five degree of freedom robot manipulators. The proposed technique, fuzzy Proportional Integral Derivative (PID) with the robust extended Kalman filter, is employed
Thanana Nuchkrua, Shyh-Leh Chen
doaj   +1 more source

Research of relationships between the technical parameters of industrial manipulators

open access: yesГірничі, будівельні, дорожні та меліоративні машини, 2023
Industrial manipulators have to become an integral part of modern construction production, playing a key role in the automation and optimization of production processes.
Yaroslav Korobenko   +2 more
doaj   +1 more source

Dynamic Manipulability of Robot Manipulators

open access: yesTransactions of the Society of Instrument and Control Engineers, 1985
The concept of dynamic manipulability measure of robot arms is proposed as a quantitative measure of their manipulating ability in positioning and orienting the end-effectors, which takes the arm dynamics into consideration. This measure is defined on the basis of the relation between the joint driving force and the acceleration of the end-effector ...
openaire   +3 more sources

Review of Fault-Tolerant Control Systems Used in Robotic Manipulators

open access: yesApplied Sciences, 2023
Control systems that ensure robot operation during failures are necessary, particularly when manipulators are operating in hazardous or hard-to-reach environments.
Andrzej Milecki, Patryk Nowak
doaj   +1 more source

ADP-Based H Optimal Control of Robot Manipulators With Asymmetric Input Constraints and Disturbances

open access: yesIEEE Access
Trajectory tracking control for robot manipulators is an attractive topic in the research community. This is a challenging problem because robot manipulators are complex nonlinear systems.
Dien Nguyen Duc   +2 more
doaj   +1 more source

Adaptive Neural Output Feedback Control for Uncertain Robot Manipulators with Input Saturation

open access: yesComplexity, 2017
This paper presents an adaptive neural output feedback control scheme for uncertain robot manipulators with input saturation using the radial basis function neural network (RBFNN) and disturbance observer.
Rong Mei, ChengJiang Yu
doaj   +1 more source

Global Asymptotic Stability of the Classical PID Controller by Considering Saturation Effects in Industrial Robots

open access: yesInternational Journal of Advanced Robotic Systems, 2011
An unsolved ancient problem in position control of robot manipulators is to find a stability analysis that proves global asymptotic stability of the classical PID control in closed loop with robot manipulators.
Antonio Yarza   +2 more
doaj   +2 more sources

Interplay between circadian and other transcription factors—Implications for cycling transcriptome reprogramming

open access: yesFEBS Letters, EarlyView.
This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley   +1 more source

Investigation on the Discretization of a Repetitive Path Planning Scheme for Redundant Robot Manipulators

open access: yesIEEE Access, 2020
Repetitive path planning (RPP) plays an important role in the operation of redundant robot manipulators. In this study, we investigate a new discrete-time RPP scheme depicted in the pseudoinverse-type formulation for redundant robot manipulators.
Limin Shen, Yuanmei Wen
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

open access: yesFEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa   +5 more
wiley   +1 more source

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