Results 251 to 260 of about 172,494 (276)

Scheduling control for periodic disturbance attenuation

2006 American Control Conference, 2006
In this paper, a scheduled controller is presented by the merging together of internal model-based control and linear parameter-varying control theory. The internal model is used to attenuate periodic disturbances and concepts from linear parameter-varying control theory are used to design the feedback gain that quadratically stabilizes the closed loop
C.E. Kinney, R.A. de Callafon
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Identification and control of periodic disturbances

2012 20th Mediterranean Conference on Control & Automation (MED), 2012
A new Adaptive Feed-Forward strategy is presented, that identifies the periodic disturbances of known frequencies. These disturbance sources can be external or internal. Internal disturbance are also called self-excited vibrations that come from the load or its parameter variations.
Izziddien Alsogkier, Christian Bohn
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Periodic disturbances in the ionosphere

Journal of Geophysical Research, 1968
Total electron content measurements, at latitudes of 34°S and 42°S, showed that 30–50% of all large-scale irregularities in the ionosphere are periodic in space and in time. The observed wavelengths were generally between 40 and 160 km. The periods ranged from about 60 minutes down to a sharply defined lower limit of 15 minutes.
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Periodic disturbance cancellation with uncertain frequency

Automatica, 2004
The authors present an adaptive algorithm based on the state-space form of the internal model for identifying and tracking the uncertain frequency of a periodic disturbance and cancelling this disturbance. The internal model controller has two functions.
Brown, L. J., Zhang, Qing
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On long‐period seismographic disturbances

Eos, Transactions American Geophysical Union, 1946
A series of experiments was carried out at Saint Louis using the Macelwane‐Sprengnether horizontal component electromagnetic seismometers working in synchronism with type H‐S, L and N galvanometers having a period of twenty seconds; both the seismometer and the galvanometer were critically damped.
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Generating Chaos by Parameter Periodic Disturbance

2006 6th World Congress on Intelligent Control and Automation, 2006
A parameter periodic disturbance method is proposed to construct chaos. By numerical analysis and circuit experiment, a second-order non-chaotic system is illustrative to validate that the proposed approach can actually generate chaos.
null Dongqing Wang, null Dongchuan Yu, null Weiguang Bi   +2 more
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Redundancy Resolution with Periodic Input Disturbance

2019
Input disturbances and physical constraints are important issues in the kinematic control of redundant manipulators. In this chapter, we present a novel recurrent neural network to simultaneously address the periodic input disturbance, joint angle constraint, and joint velocity constraint, and optimize a general quadratic performance index.
Yinyan Zhang, Shuai Li, Xuefeng Zhou
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On lp disturbance rejection using periodic feedback control

Systems & Control Letters, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, Cishen, Zhang, Jingxin, Schmid, Robert   +2 more
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Periodic motions of coupled simple pendulums with periodic disturbances

International Journal of Non-Linear Mechanics, 1968
Abstract Several theorems on the existence of oscillatory, rotary, and mixed periodic motions of n , coupled simple pendulums are proved. These theorems are very general and include subharmonic and ultraharmonic type solutions as well as harmonic type solutions and cover cases of large coupling and disturbances as well as small. The results are also
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Asymptotic Rejection of General Periodic Disturbances

2005 International Conference on Control and Automation, 2005
This paper deals with asymptotic rejection of general periodic disturbances in nonlinear systems. A novel approach based on integrations over the half of disturbance period is proposed to estimate disturbances which may not be harmonic or even smooth. The proposed algorithm uses the period and the knowledge of the basic disturbance patterns, while the ...
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