Results 21 to 30 of about 173,243 (295)

Active Disturbance Rejection Control Method for Marine Permanent-Magnet Propulsion Motor Based on Improved ESO and Nonlinear Switching Function

Journal of Marine Science and Engineering, 2023
In the control of marine permanent-magnet propulsion motors, active disturbance rejection control has attracted much attention because it can deal with external load disturbances and uncertainties of motor parameters at the same time.
Haohao Guo, Tianxiang Xiang, Yancheng Liu, Qiaofen Zhang, Siyuan Liu, Boyang Guan   +5 more
doaj   +1 more source

Parameterization of All Disturbance Observers for Periodic Input Disturbances

ECTI Transactions on Electrical Engineering, Electronics, and Communications, 2023
In this paper, we examine the parameterizations of all disturbance observers and all linear functional disturbance observers for periodic input disturbances. The plant disturbance observers have been used to estimate the disturbance in the plant. Several papers on design methods for disturbance observers have been published.
Sorawin Phukapak, Daisuke Koyama, Kotaro Hashikura, Md Kama, Iwanori Murakami, Kou Yamada   +5 more
openaire   +1 more source

Observer based tuning techniques and integrated SAW torque transducers for two-inertia servo-drive systems [PDF]

, 2005
A controller design and tuning methodology is proposed that facilitates the rejection of periodic load-side disturbances applied to a torsional mechanical system, whilst simultaneously compensating for the disturbance observer's inherent phase delay ...
Bingham, Chris, O'Sullivan, T M, Schofield, N   +2 more
core   +1 more source

Experimental and constitutive model study on the mechanical properties of a structural plane of a rock mass under dynamic disturbance

Scientific Reports, 2022
An accurate description of the mechanical properties and deformation characteristics of a structural plane of a rock mass with a large chamber or slope under the ultimate stress with periodic stress disturbances is of great significance to ensure the ...
Yongjiang Yu, Yuntao Yang, Jingjing Liu, Pengbo Wang, Shipeng Zhang, Zhenmeng Wang, Shangqing Zhao   +6 more
doaj   +1 more source

A Study on Optimal Compensation Design for Meteorological Satellites in the Presence of Periodic Disturbance

Applied Sciences, 2018
Periodic disturbance may cause serious effects on the attitude of meteorological satellites, and the attenuation of periodic disturbance is required. In this paper, a fundamental study on the optimal design of constant compensations against known-law ...
Shijie Xu, Naigang Cui, Youhua Fan, Yingzi Guan   +3 more
doaj   +1 more source

A High–Precision Motion Control Based on a Multi-Rate Periodic Adaptive Disturbance Observer of a Linear Actuator for High Load Systems

IEEE Access, 2020
This study is concerned with the problem of compensating for periodic disturbances under repetitive motion conditions. In order to achieve high precision positioning for high load systems with periodic disturbances, a practical motion control scheme ...
Kwanghyun Cho, Kanghyun Nam
doaj   +1 more source

Thermal receptivity of free convective flow from a heated vertical surface: linear waves [PDF]

, 2008
Numerical techniques are used to study the receptivity to small-amplitude thermal disturbances of the boundary layer flow of air which is induced by a heated vertical flat plate.
Arakawa, Bake, Briggs, Brooker, Chen, D. Andrew S. Rees, Dietz, Fasel, Goldstein, Goldstein, Haaland, Haddad, Heiber, Herwig, Janssen, Kloker, Liepmann, Manosh C. Paul, Michael Wilson, Paul, Pohlhausen, Rees, Rees, Rees, Stemmer, Szewczyk, Tam, Tao, Wu, Wu, Wu   +30 more
core   +1 more source

Properties of the laminar-turbulent transition in a mixing layer by the low-frequency disturbance (Effect of the anti-symmetrical disturbance)

Journal of Fluid Science and Technology, 2014
The laminar-turbulent transition of a mixing layer excited by oscillating flat plates at an exit of a two-dimensional nozzle was experimentally investigated. The mixing layer was formed between the jet issued from the nozzle and the surrounding quiescent
Masashi ICHIMIYA, Hiroshi SAKAI, Takeshi OOHARA   +2 more
doaj   +1 more source

Dynamic planar magnetic reconnection solutions for incompressible plasmas [PDF]

, 1999
The planar magnetic reconnection problem for viscous, resistive plasmas is addressed. We show that solutions can be developed by superposing transient nonlinear disturbances onto quiescent “background” fields.
Craig, Ian J.D., Watson, P.G.
core   +2 more sources

Observer-based tuning of two-inertia servo-drive systems with integrated SAW torque transducers [PDF]

, 2007
This paper proposes controller design and tuning methodologies that facilitate the rejection of periodic load-side disturbances applied to a torsional mechanical system while simultaneously compensating for the observer’s inherent phase delay.
Bingham, Chris, O'Sullivan, T, Schofield, N   +2 more
core   +1 more source