Results 251 to 260 of about 2,887,363 (295)

Correction and Stabilization of Angular Kyphosis

Clinical Orthopaedics and Related Research, 1990
Reconstruction of normal geometric relationships, regardless of original pathology, has to be the goal when treating angular kyphosis. Since anterior and posterior spinal structures are involved, successful decompression, correction, and stabilization require both dorsal and ventral surgery.
H, Böhm, J, Harms, R, Donk, K, Zielke
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Attitude stabilization for aircraft under angular velocity constraint

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, 2020
This paper mainly investigates the attitude control problem for a spacecraft. Not only angular velocity constraint but also external disturbances are considered in the system model. Under the action of proposed controller, the posture can be converged to the desired value, and the angular velocity can be asymptotically converged to the origin.
Bo Yu 0023, Linan Wang, Haibo Du, Jun Zhou, Di Wu 0052, Shihong Ding   +5 more
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Optimal angular stability of reflectionless metasurface absorbers

Physical Review B, 2021
In this work, we investigate the possibilities of reaching wide-angle perfect absorption with Huygens' metasurfaces possessing both electric and magnetic responses. We analyze the role of the anisotropy of the polarizability tensor of the unit cell and reveal the conditions for the optimal angular stability in symmetric absorption as well as ...
J. P. del Risco, I. S. Mikhalka, V. A. Lenets, M. S. Sidorenko, A. D. Sayanskiy, S. B. Glybovski, A. L. Samofalov, S. A. Khakhomov, I. V. Semchenko, J. D. Ortiz, J. D. Baena   +10 more
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Stabilization of angular velocity of a rigid body

2011 Third International Conference on Measuring Technology and Mechatronics Automation, 2011
This paper addresses the control of angular velocity of a rigid body with two actuators. Based on the feedback transformed system, a discontinuous feedback control law is proposed with finite time terminal sliding mode. Numerical simulation is implemented. The result shows that the control law can stabilize the system with exponential rate.
null Xiju Zong, null Xingong Cheng
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A Control Method for Angular Stabilization of an Electrodynamic Tether System

Automation and Remote Control, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Angular Stability of Intramedullary Elastic Osteosynthesis

Biomedical Engineering, 2016
The article presents results of biomechanical bench tests of bone fragment fixation using the model of a transverse diaphyseal fracture in a long cortical bone in two mutually perpendicular planes for different modes of installation of flexible titanium rods by the flexible intramedullary nailing (FIN) method.
A. A. Korobeinikov, Ju. E. Pervuninskaya, D. A. Popkov   +2 more
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Robust Stabilization of the Angular Velocity for an Underactuated Rigid Spacecraft

IFAC Proceedings Volumes, 1998
Abstract We consider the asymptotic stabilization of the angular velocity for a rigid spacecraft with two control torques. While this is a classical problem in the nonlinear control literature, the issue of robust performance in the presence of perturbations has received less attention.
LUCIBELLO P., ORIOLO, Giuseppe
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Tunable Frequency Selective Surface With Angular Stability

IEEE Antennas and Wireless Propagation Letters, 2021
In this letter, a paradigm for designing tunable frequency selective surfaces (FSSs) with angular stability is presented. The tunable FSS is implemented by nonresonant subwavelength unit cells loaded with varactor diodes, which can be applied in a dynamic and efficient compensation mechanism.
Hui Bai, Mingbao Yan, Weihan Li, Jiafu Wang, Lin Zheng, He Wang, ShaoBo Qu   +6 more
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Stability Robustness of Closed‐Loop Systems in Angular Metrics

Asian Journal of Control, 2016
AbstractH∞‐norm is widely used in the analysis and synthesis of robust control, a field which continues to flourish and develop. However, H∞‐norm can only be used to measure the distance between two stable systems, not unstable systems. Sometimes, it is not appropriate to measure the gap between two systems. In this paper, a new metric, angular metric,
Liu, Bin, Li, Wei, Zhang, Lingchuan
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Transient stability angular increment computer

Electrical Engineering, 1956
DETERMINATION of the transient-stability limit of a power system requires expressing the rotor angle of each machine or group of machines in the system as a function of time following the initial disturbance. This problem has been solved using miniature dynamic systems, digital computers, and differential analyzers.
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