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Generalized Active Control of Vibrations in Helicopters
Journal of Guidance, Control, and Dynamics, 2002The problem of active control of vibrations in the main rotor of helicopters is dealt with in the individual blade control framework. We propose a controller valid for a generic e ight condition by resorting to a linear parametrically varying (LPV)controltechniquecoupled with theso-called internalmodelcontrol (IMC)principle.
BITTANTI, SERGIO, F. Cuzzola
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Active Control Of Flow-induced Vibration
Journal of Sound and Vibration, 1993Abstract The active control of flow-induced oscillations, specifically, vortex-induced oscillations of circular cylinders and galloping oscillations of circular cylinders and galloping oscillations of a square prism, are considered. In the case of vortex-induced oscillations, the vibrating cylinder is modeled as a single-degree-of-freedom (sdof ...
Venkatraman, K., Narayanan, S.
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Active Vibration Control of a Smart Fin
50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2009This paper summarizes the design and wind tunnel experimental verifications of robust H∞ controllers for active vibration suppression of a dynamically scaled F-18 vertical smart fin. The smart fin consists of a cantilevered aluminium plate structure with surface bonded piezoelectric (Lead-Zirconate-Titanete, PZT) patches, Integrated Circuit ...
Chen, Y. +4 more
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An LQ Approach to Active Control of Vibrations in Helicopters
Journal of Dynamic Systems, Measurement, and Control, 1996In this paper, Linear Quadratic (LQ) optimal control concepts are applied for the active control of vibrations in helicopters. The study is based on an identified dynamic model of the rotor. The vibration effect is captured by suitably augmenting the state vector of the rotor model.
BITTANTI, SERGIO +2 more
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The Journal of the Acoustical Society of America, 2006
A vibration controller includes a map controller, an adaptive controller, a set-up frequency judge/switcher, and an actuator. The map controller includes a data map storage for storing data on control signals determined in advance for a vibration insulator, and a signal generator for selecting one of the data, depending on a frequency of a cyclically ...
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A vibration controller includes a map controller, an adaptive controller, a set-up frequency judge/switcher, and an actuator. The map controller includes a data map storage for storing data on control signals determined in advance for a vibration insulator, and a signal generator for selecting one of the data, depending on a frequency of a cyclically ...
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A robust controller for active vibration control of flexible systems
Proceedings of the 36th IEEE Conference on Decision and Control, 2002In this paper an active vibration controller for flexible systems is developed using a sliding manifold approach. The sliding surface consists of a time-invariant part which "eliminates" the selected modes without affecting the other dynamics, and a time-varying part which bounds the control amplitude and its rate in the transient.
CAVALLO, Alberto +3 more
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Active Vibration Isolation by Adaptive Control
Journal of Vibration and Control, 2001In this paper, an adaptive controller known as a self-tuning regulator (STR) is employed for active vibration isolation. Numerical simulation of the developed STR for active vibration isolation of a simple two- degree-of-freedom mechanical system subject to external disturbances is carried out.
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Active Vibration Control for Aeroengines
2021The problem of aero-engine vibration has always been the focus and difficulty of many scholars at home and abroad. Vibration control is an important research direction in the field of aeroengine vibration engineering. In order to solve the problems of poor adaptability to passive vibration isolation and insufficient control effect of aero-engines, this
Ran An +4 more
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Active vibration control system
The Journal of the Acoustical Society of America, 1995An adaptive control circuit is responsive to a reference signal, i.e. an output from a sensor which senses vibration from a vibration source, for generating a cancelling signal having a transfer characteristic inverse to a transfer characteristic of vibration from the vibration source to a human body.
Hideshi Sawada, Hisashi Sano
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Active vibration control system
The Journal of the Acoustical Society of America, 2006An active vibration control system including a sensor responsive to a source of vibration and which provides an output signal representative of the vibrations; at least one actuator positioned to impart canceling vibrations to the source of vibrations based on an input signal; a correction subsystem responsive to the actuator for estimating the sensor ...
Wayne Hill, Lev S. Tsimring
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