Results 21 to 30 of about 16,236 (260)

ADRC Attitude Controller Design for Hypersonic Vehicle based on MIMO-ESO

MATEC Web of Conferences, 2018
For the hypersonic vehicle nonlinear attitude mode in reentry process with a strong coupling, aerodynamic parameter perturbations and non-deterministic, combine extended state observer and nonlinear law state error feedback, design the hypersonic vehicle
Wen JianHua, Qin ChangMao, Zhang Xin
doaj   +1 more source

Different twins in the millisecond pulsar recycling scenario: optical polarimetry of PSR J1023+0038 and XSS J12270-4859 [PDF]

, 2016
We present the first optical polarimetric study of the two transitional pulsars PSR J1023+0038 and XSS J12270-4859. This work is focused on the search for intrinsical linear polarisation (LP) in the optical emission from the two systems.
Baglio, M. C., Campana, S., Covino, S., D'Avanzo, P., Russell, D. M., Zelati, F. Coti   +5 more
core   +2 more sources

Experimental External Force Estimation Using a Non-Linear Observer for 6 axes Flexible-Joint Industrial Manipulators [PDF]

, 2013
This paper proposes a non-linear observer to estimate not only the state (position and velocity) of links but also the external forces exerted by the robot during Friction Stir Welding (FSW) processes.
ABBA, Gabriel, LEONARD, François, QIN, Jinna   +2 more
core   +6 more sources

Development of the PD/PI Extended State Observer to Detect Sensor and Actuator Faults Simultaneously [PDF]

, 2017
This paper discusses about an observer based faultdetection scheme to detect sensor and actuator faultssimultaneously in LTI system. The proposed strategy is to addderivative action on the extended state observer (ESO) in additionto proportional-integral
Agustinah, Trihastuti, Indriawati, Katherin, Jazidie, Achmad   +2 more
core   +2 more sources

On Convergence of Extended State Observer for a Class of MIMO Uncertain Stochastic Nonlinear Systems

IEEE Access, 2018
Extended state observer (ESO) is the key part of active disturbance rejection control, a new control strategy motivated and developed highly from PID's model-free feature. In this paper, both constant gain ESO and time-varying gain ESO are proposed for a
Zehao Wu, Guoshun Huang, Chufen Wu, Chunwan Lv, Lingxin Bao   +4 more
doaj   +1 more source

Detection of high-velocity material from the wind-wind collision zone of Eta Carinae across the 2009.0 periastron passage [PDF]

, 2010
We report near-IR spectroscopic observations of the Eta Carinae massive binary system during 2008-2009 using VLT/CRIRES. We detect a strong, broad absorption wing in He I 10833 extending up to -1900 km/s across the 2009.0 spectroscopic event.
A. Damineli, A. T. Okazaki, Abraham, Abraham, Behar, Chesneau, Corcoran, Corcoran, Corcoran, D. J. Hillier, D. Schertl, Damineli, Damineli, Damineli, Damineli, Damineli, Damineli, Davidson, Davidson, Davidson, Duncan, F. Kerber, F. Millour, Falceta-Gonçalves, Falceta-Gonçalves, Feast, Fernández-Lajús, Fernández-Lajús, Fernández-Lajús, G. Weigelt, Gaviola, Groh, Groh, Gull, H. Hartman, Hamaguchi, Hartman, Henley, Hillier, Hillier, Hillier, Hofmann, Humphreys, Iping, Ishibashi, J. H. Groh, K. E. Nielsen, K. Murakawa, K.-H. Hofmann, Kashi, Kashi, Kashi, Kashi, Kerber, M. Teodoro, Mehner, Nielsen, Nielsen, Okazaki, Parkin, Pittard, Pittard, S. Kraus, S. P. Owocki, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Smith, Stahl, Steiner, T. Driebe, T. I. Madura, T. R. Gull, Teodoro, Thackeray, van Boekel, van Genderen, van Genderen, Verner, Viotti, Walborn, Weigelt, Weigelt, Weis, Whitelock, Whitelock, Zanella   +90 more
core   +2 more sources

The Relative Orientation of Nuclear Accretion and Galaxy Stellar Disks in Seyfert Galaxies [PDF]

, 1999
We use the difference (delta) between the position angles of the nuclear radio emission and the host galaxy major axis to investigate the distribution of the angle (beta) between the axes of the nuclear accretion disk and the host galaxy disk in Seyfert ...
Andrew S. Wilson, Antonucci R. R. J., Davies R. D., Edmunds M. G., Kukula M. J., Morris S., Mundell C. G., Neff S. G., Neil M. Nagar, Pedlar A., Pringle J. E., Sandqvist A., Sopp H. M., Takase B., Ulvestad J. S., Unger S. W., Winkler H.   +16 more
core   +4 more sources

Attitude control of flexible space structures using extended state observer

Computer Assisted Methods in Engineering and Science, 2023
In this paper, we construct a nonlinear Extended State Observer (ESO) to estimate the dynamics of linear or nonlinear systems with parameter uncertainties and unknown external disturbances.
Bagus Mahawan, Zheng-Hua Luo, Jing-Qing Han   +2 more
doaj  

Extended-State-Observer-Based Super Twisting Control for Pneumatic Muscle Actuators

Actuators, 2021
This paper presents a tracking control method for pneumatic muscle actuators (PMAs). Considering that the PMA platform only feedbacks position, and the velocity and disturbances cannot be observed directly, we use the extended-state-observer (ESO) for ...
Yu Cao, Zhongzheng Fu, Mengshi Zhang, Jian Huang   +3 more
doaj   +1 more source

Robust motion control of four-vector-thruster AUV “Aurora” under disturbances: optimized ESO-FAISMC control with thrust allocation optimization

Ain Shams Engineering Journal
Against challenges from internal model inaccuracies and external environmental disturbances affecting vector Autonomous Underwater Vehicles (AUVs) tracking, this paper focuses on the team-developed 4-vector AUV Aurora, establishing its kinematic/dynamic ...
Yipin Tong, Bin Huang, Yang Wang, Liming Wang, Wei Pan, Xiaoling Yan, Bi He   +6 more
doaj   +1 more source