Journal ArticleDOI
Multi-mode vibration control of a flexible cantilever beam using adaptive resonant control
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In this paper, an adaptive resonant controller is used to attenuate multi-mode vibrations in a flexible cantilever beam structure with varying loading conditions, which is particularly designed for structures that are exposed to previously unmodelled dynamics.Abstract:
In this paper, an adaptive resonant controller is used to attenuate multi-mode vibrations in a flexible cantilever beam structure with varying loading conditions. This controller is particularly designed for structures that are exposed to previously unmodelled dynamics. On-line estimation of the structure's natural frequencies is used to update the adaptive resonant controller's parameters. The estimation of the natural frequencies is achieved using a parallel set of second-order recursive least squares estimators, each of which is designed for a specific vibration mode of concern. To achieve the desired estimation accuracy for each mode frequency, a different sampling rate suitable for that mode is used for the corresponding estimator. Experiment results show that the proposed adaptive strategy can achieve better performance, as measured by attenuation level, over its fixed-parameter counterpart for a range of unmodelled dynamics.read more
Citations
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A High-Resolution MEMS Piezoelectric Strain Sensor for Structural Vibration Detection
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Experimental Implementation on Vibration Mode Control of a Moving 3-PRR Flexible Parallel Manipulator with Multiple PZT Transducers
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Journal ArticleDOI
Equal modal damping design for a family of resonant vibration control formats
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Experimental model identification and vibration control of a smart cantilever beam using piezoelectric actuators and sensors
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References
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Journal ArticleDOI
Performance of an active control system with piezoelectric actuators
Amr M. Baz,S. Poh +1 more
TL;DR: In this article, a modified independent modal space control method is employed to select the optimal location, control gains, and excitation voltage of the piezoelectric actuators, which minimizes both the vibration amplitudes of the beams to which these actuators are bonded and the input control effort needed to suppress these vibrations.
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On the stability problem caused by finite actuator dynamics in the collocated control of large space structures
C. J. Goh,T. K. Caughey +1 more
TL;DR: In this paper, the nature of these stability problems is investigated, and a technique using position feedback is considered to solve the problem of low-frequency modes not destabilizing intermediate and higher-order modes.
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Resonant controllers for smart structures
TL;DR: In this article, a special type of colocated feedback controller for smart structures is proposed, which is a parallel combination of high-Q resonant circuits tuned to a pole (or the resonant frequency) of the smart structure.
Journal ArticleDOI
Design variables for bias distribution in transfer function estimation
Bo Wahlberg,Lennart Ljung +1 more
TL;DR: In this paper, the authors investigated how the choices of prefilters, noise models, sampling interval, and prediction horizon (i.e., the use of k-step ahead prediction methods) influence the estimate.
Journal ArticleDOI
The relationship between positive position feedback and output feedback controllers
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