Journal ArticleDOI
Experimental Demonstration of H∞ Control based Active Vibration Suppression in Composite Fin-tip of Aircraft using Optimally Placed Piezoelectric Patch Actuators:
TLDR
In this article, a multi-mode structural vibration control in the composite fin-tip of an aircraft is proposed using particle swarm based evolutionary optimization technique for optimal placement of piezoelectric patch actuators.Abstract:
The goal of this study is the multi-mode structural vibration control in the composite fin-tip of an aircraft. Structural model of the composite fin-tip with surface bonded piezoelectric actuators is developed using the finite element method. The finite element model is updated experimentally to reflect the natural frequencies and mode shapes accurately. A model order reduction technique is employed for reducing the finite element structural matrices before developing the controller. Particle swarm based evolutionary optimization technique is used for optimal placement of piezoelectric patch actuators and accelerometer sensors to suppress vibration. H{infty} based active vibration controllers are designed directly in the discrete domain and implemented using dSpace® (DS-1005) electronic signal processing boards. Significant vibration suppression in the multiple bending modes of interest is experimentally demonstrated for sinusoidal and band limited white noise forcing functions.read more
Citations
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Journal ArticleDOI
Adaptive control of an active seat for occupant vibration reduction
TL;DR: In this article, an active seat system is proposed to reduce the vibration level transmitted to the seat pan and occupants' body under low frequency periodic excitation, where a Filtered-x least-mean-square (FXLMS) adaptive control algorithm with online Fast-block LMS identification process is employed to manage the system operation for high vibration cancellation performance.
Journal ArticleDOI
An algorithm for LQ optimal actuator location
TL;DR: A subgradient-based optimization scheme which leads to the global solution of the problem is used to optimize actuator locations and is compared with a genetic algorithm, and is observed to be faster and more accurate.
Journal ArticleDOI
Vibration control of smart hull structure with optimally placed piezoelectric composite actuators
TL;DR: In this article, an active vibration control to suppress structural vibration of the smart hull structure was investigated based on optimized actuator configurations using anisotropic piezoelectric composite actuator, Macro-Fiber Composite (MFC), was used for the vibration control.
Journal ArticleDOI
Vibration suppression control of smart piezoelectric rotating truss structure by parallel neuro-fuzzy control with genetic algorithm tuning
J. Lin,Y.B. Zheng +1 more
TL;DR: In this paper, an adaptive neuro-fuzzy inference system (ANFIS) with GA tuning was used to increase the efficiency of fuzzy control for vibration control on a piezoelectric rotating truss structure.
Journal ArticleDOI
Efficiency of electromechanical impedance for load and damage assessment along the thickness of lead zirconate titanate transducers in structural monitoring
TL;DR: In this paper, the increment of load and damage severity along the thickness direction is monitored, where the transducers are bonded on the structure to be monitored such that surface area (length × width) of the transducer is in contact with the structure.
References
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Journal ArticleDOI
State-space solutions to standard H/sub 2/ and H/sub infinity / control problems
TL;DR: In this article, simple state-space formulas are derived for all controllers solving the following standard H/sub infinity / problem: for a given number gamma > 0, find all controllers such that the H/ sub infinity / norm of the closed-loop transfer function is (strictly) less than gamma.
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Use of piezoelectric actuators as elements of intelligent structures
Edward F. Crawley,Javier de Luis +1 more
TL;DR: In this paper, a scaling analysis is performed to demonstrate that the effectiveness of actuators is independent of the size of the structure and evaluate various piezoelectric materials based on their effectiveness in transmitting strain to the substructure.
Journal ArticleDOI
On the computation of all global minimizers through particle swarm optimization
TL;DR: The approaches include transformations of the objective function through the recently proposed deflection and stretching techniques, as well as a repulsion source at each detected minimizer, resulting in an efficient algorithm which has the ability to avoid previously detected solutions and, thus, detect all global minimizers of a function.
Journal ArticleDOI
Advances in piezoelectric finite element modeling of adaptive structural elements: a survey
TL;DR: In this paper, the advances and trends in the formulations and applications of the finite element modeling of adaptive structural elements are surveyed and discussed in a first attempt to survey and discuss the advances.