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Effect of the thickness of the piezoelectric patches on the active control of a thin plate

Latrache M., Amrane M. N.

Mechanics and Mechanical Engineering

2018

Vol. 22, nr 4

1345--1354

This paper presents a numerical study pertaining to on the active vibration control (AVC) of the 3-D rectangle simply supported plate bonded of the piezoelectric sensor/actuator pairs. A LQR controller is designed based on the independent mode space control techniques to stifle the vibration of the system. The change in the thickness of the patches was a clear impact on the control results, and also in the values of the voltage in actuator. The results were established by simulating in ANSYS and MATLAB.

Active control of transient torsional vibrations due to run-up of a rotor machine driven by the electric motor

Szolc T., Jankowski Ł.

Vibrations in Physical Systems

2008

Vol. 23

341--346

In the paper active control of transient torsional vibrations induced by the electric motor during run-ups of the radial compressor drive system is performed by means of couplings with the magneto-rheological fluid. The main purpose of these studies is a minimisation of vibration amplitudes in order to increase the fatigue durability of the most responsible elements. The theoretical investigations are based on a hybrid structural model of the vibrating mechanical system and sensitivity analysis of the response with respect to the damping characteristics of the control couplings.

Active noise and vibration control

Elliott S. J.

Applied Mathematics and Computer Science

1998

Vol. 8, no 2

213-251

Active control can reduce sound and vibration by destructive interference between the original, primary, field and the field generated by controllable secondary sources. It is most effective at low frequencies, for which the wavelength of the disturbance is comparable with the dimensions of the region being controlled. In this review paper the physical limitations of performance are first explored for vibration on a plate and sound in an enclosure, and the nature of the plant response is discussed in these two cases. Adaptive feedforward control algorithms have been successfully used in active control, and these are discussed in terms of an equivalent feedback control system. Finally, the feedback control of sound and vibration is discussed, from the point of view of Internal Model Control, emphasising the importance of plant delay in determining optimal performance, and the trade-off between disturbance rejection and robust stability.