In active structural acoustic control the goal is to reduce the sound radiation of a structure by means of changing the vibrational behaviour of that structure. The performance of such an active control system is to a large extent determined by the locations of the actuators and sensors. In this work an approach is presented for the optimization of the actuator and sensor locations. The approac...

1 With guided-wave approaches becoming prevalent for structural health monitoring, the need has arisen for more effective models employing these methods using piezoelectric transducers. This paper describes an analytical formulation to couple transducer dynamics with axisymmetric guided-wave excitation models for isotropic plates. The finite-dimensional piezo-actuator dynamics are modeled using...

In this paper, the vibration characteristics of multi-layer shell that internal and external surfaces with a layer of piezoelectric sensor and actuator is investigated. The backrest shell laminated with simple analytical method to evaluate and the results were compared with results obtained by other researchers. The numerical solution methods (GDQ) for shells with piezoelectric layers and plain...

Piezoelectric actuators are widely used in micro manipulation applications. However hysteresis nonlinearity limits accuracy of these actuators. This paper presents a novel approach for utilizing a piezoelectric nano-stage as slave manipulator of a teleoperation system. The Prandtl-Ishlinskii (PI) model is used to model actuator hysteresis in feedforward scheme to cancel out this nonlinearity. T...

This paper presents the design of a robust H∞ controller for fast tracking of an Atomic Force Microscope (AFM). The controller design is based on a physical model of the AFM piezoelectric tube positioner. External capacitors are connected in series with the x and y contacts of the piezoelectric tube to provide measured voltages which are proportional to the charge on the actuator. The parameter...

The main of this research is to solve the problems mixing fluids in microchannels. aim improve efficiency microchannel by employing piezoelectric actuator. objectives project are to, producing ZnO (Zinc Oxide) thin films, preparing with desired dimensions and examining nanoparticles were produced coprecipitation method, purity phase checked using XRD films Ultrasonic Spray pyrolysis, thickness ...