Results 11 to 20 of about 1,082,405 (237)

A nonlinear disturbance observer for robotic manipulators [PDF]

, 2000
A new nonlinear disturbance observer (NDO) for robotic manipulators is derived in this paper. The global exponential stability of the proposed disturbance observer (DO) is guaranteed by selecting design parameters, which depend on the maximum velocity ...
Chen, W.H., Ballance, D.J., Gawthrop, P.J.   +2 more
core   +8 more sources

Solent Disturbance and Mitigation Project Phase II: Predicting the impact of human disturbance on overwintering birds in the Solent. [PDF]

, 2012
The Solent coastline provides feeding grounds for internationally protected populations of overwintering waders and wildfowl, and is also extensively used for recreation.
West, Andrew D., Liley, D., Clarke, Ralph T., Stillman, Richard A.   +3 more
core   +9 more sources

Differences in Cognitive Avoidance, Anger Rumination, and The General Anxiety in Light of The Gender and Emotional Regulation Disturbance Among Undergraduate Students

SAGE Open, 2023
The current study aimed to determine the differences in cognitive avoidance, anger rumination, and general anxiety in response to the gender and the emotional regulation disturbance variables.
Rehab Tahoon
doaj   +1 more source

A generalized proportional integral observer–based robust tracking design approach for quadrotor unmanned aerial vehicle

International Journal of Advanced Robotic Systems, 2022
This article mainly studies the trajectory tracking control for quadrotor unmanned aerial vehicle with unknown time-varying disturbances including parametric uncertainties, model errors, and external disturbances such as wind effects.
Shenghui Li, Zhenxing Sun
doaj   +1 more source

A Backstepping Controller Based on a Model-Assisted Extended State Observer for a Slice Rotor Supported by Active Magnetic Bearings

Actuators, 2022
To improve the robustness of a slice rotor system supported by active magnetic bearings (AMBs), here, we propose a backstepping controller based on a model-assisted extended state observer (MESO-BC). Based on a generalized extended state observer (GESO),
Boyuan Xu, Jin Zhou, Longxiang Xu
doaj   +1 more source

Multi-cyclone analysis and machine learning model implications of cyclone effects on forests

International Journal of Applied Earth Observations and Geoinformation, 2021
Past studies of cyclones (hurricanes, typhoons, tropical cyclones) disturbance showed that meteorological, topographical, and biological factors affect the patterns of forest disturbance intensity but left open the extent to which these findings were ...
Yanlei Feng, Robinson I. Negrón-Juárez, Jeffrey Q. Chambers   +2 more
doaj   +1 more source

Model-free active input–output feedback linearization of a single-link flexible joint manipulator: An improved active disturbance rejection control approach

Measurement + Control, 2021
Traditional input–output feedback linearization requires full knowledge of system dynamics and assumes no disturbance at the input channel and no system’s uncertainties.
Wameedh Riyadh Abdul-Adheem, Ibraheem Kasim Ibraheem, Amjad J Humaidi, Ahmad Taher Azar   +3 more
doaj   +1 more source

A refined disturbance rejection control for vibration suppression of smart structures under unknown disturbances

Journal of Low Frequency Noise, Vibration and Active Control, 2021
Vibrations are usually caused by continuous disturbances with large amplitudes. Different from other control methods, disturbance rejection control is a potential method, which considers the unknown disturbances in the control design.
Shun-Qi Zhang, Xiao-Yu Zhang, Hong-Li Ji, Shen-Shun Ying, Rüdiger Schmidt   +4 more
doaj   +1 more source

Habitat-mediated facilitation and counteracting ecosystem engineering interactively influence ecosystem responses to disturbance [PDF]

, 2011
Recovery of an ecosystem following disturbance can be severely hampered or even shift altogether when a point disturbance exceeds a certain spatial threshold. Such scale-dependent dynamics may be caused by preemptive competition, but may also result from
Zee, Els M. van der, Zee, Els M. van der,, van der Heide, Tjisse; id_orcid, van der Heide, Tjisse, Eriksson, Britas Klemens; id_orcid, van der Heide, T., Eriksson, B.K., O'Hara, R., O'Hara, Robert, Tjisse van der Heide, Heide, Tjisse van der,, Johan S. Eklöf, Johan S Eklöf, Serena Donadi, Eklöf, Johan,, O\u27Hara, R., Robert O'Hara, Eklöf, Johan S., Heide, Tjisse van der, Els M van der Zee, Eklöf, Johan, Eklöf, J.S., O´Hara, Robert, van der Zee, Els, O’Hara, Robert,, Els M. van der Zee, Eklöf, Johan S.,, Eriksson, Britas Klemens, Donadi, Serena, Britas Klemens Eriksson, O'Hara, Robert B., van der Zee, Els M., Donadi, Serena,, van der Zee, E.M., Eriksson, Britas Klemens,, Donadi, S.   +35 more
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Generalized-Disturbance Rejection Control for Vibration Suppression of Piezoelectric Laminated Flexible Structures

Shock and Vibration, 2018
In the framework of disturbance rejection (DR) control, the paper proposes a generalized-disturbance rejection (GDR) control with proportional-integral (PI) observer for vibration suppression of smart structures under any unknown continuous disturbances.
Xiao-Yu Zhang, Run-Xiao Wang, Shun-Qi Zhang, Zhan-Xi Wang, Xian-Sheng Qin, Rüdiger Schmidt   +5 more
doaj   +1 more source