Results 261 to 270 of about 141,115 (295)
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Frequency-shaped sliding modes: analysis and experiments
IEEE Transactions on Control Systems Technology, 1997A recent improvement over a motion control algorithm, sliding mode control with perturbation estimation, is considered in this paper. It enforces the nonlinear system to follow a desired trajectory despite the presence of modeling uncertainties and disturbances.
Jairo Terra Moura +2 more
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SENSITIVITY-BASED OPERATIONAL MODE SHAPE NORMALISATION
Mechanical Systems and Signal Processing, 2002In the past few years, in-operation modal analysis has become a valid alternative for structures where classic forced vibration tests would be difficult, if not impossible, to conduct. A disadvantage of this method is that the excitation forces are unknown. Therefore, not all modal parameters can still be estimated.
Parloo, Eli +3 more
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Surface vibrational modes in disk-shaped resonators
Ultrasonics, 2014The natural frequencies and distributions of displacement components for the surface vibrational modes in thin isotropic elastic disks are calculated. In particular, the research is focused on even solutions for low-lying resonant vibrations with large angular wave numbers.
A V, Dmitriev +2 more
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On mode shapes of a stability problem
Journal of Sound and Vibration, 1976Abstract This paper presents data of mode shapes of some stable and unstable modes of a free-free beam under direction controlled thrusts. These mode shapes are pertinent in understanding this basic problem and hitherto were not available in the literature. It has been found that the node number of the mode shape corresponding to the first divergence
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Shaped Input Control of a System With Multiple Modes
Journal of Dynamic Systems, Measurement, and Control, 1993This paper describes a method for limiting vibration in flexible systems that have more than one characteristic frequency and mode. It is only necessary to have knowledge of the component mode frequencies and damping ratios in order to be able to calculate the timing and magnitudes of the impulse sequence used in the shaping.
Singh, T., Heppler, G. R.
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Lasing modes in a spiral-shaped dielectric microcavity
Optics Letters, 2006The resonance patterns and lasing modes in a spiral-shaped dielectric microcavity are investigated through passive and active medium calculations. We find that the high-Q resonance modes are whispering-gallery-like modes, and these resonance modes can be easily excited as lasing modes.
Tea-Yoon, Kwon +5 more
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An approach for estimating mode shape for participation of inter-area oscillation mode
2013 IEEE International Symposium on Circuits and Systems (ISCAS2013), 2013This paper presents a novel approach for estimating mode shape for participation (MSFP) among areas or main power plants involving inter-area oscillation (IAO) mode, by analyzing power deviation (ΔP) signals. The case study has been carried out on a planning case in East China Power Grid (ECPG).
Song Han, Na Rong, Ting Sun, Jing Zhang
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An Elasticity Approach to Principal Modes of Shape Variation
2009Concepts from elasticity are applied to analyze modes of variation on shapes in two and three dimensions. This approach represents a physically motivated alternative to shape statistics on a Riemannian shape space, and it robustly treats strong nonlinear geometric variations of the input shapes.
Martin Rumpf, Benedikt Wirth
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Noise Sensitivity of Mode Shape and Mode Shape Difference to Damage Detection
2022Muyideen Abdulkareem, Abideen Ganiyu
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On Adiabatic Normal Modes in a Wedge-Shaped Sea
Journal of Mathematical Sciences, 2019zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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