OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. This paper is about an open multi-physics modelling problem resulting from recent investigations into plasma generation by piezo-electric transformers. In this first approach, the electric field distribution surrounding the transformer is studied according...

The emerging electro-mechanical impedance technology has high potential for in-situ health monitoring and NDE of structural systems and complex machinery. At first, the fundamental principles of the electro-mechanical impedance method are briefly reviewed and ways for practical implementation are highlighted. The equations of piezo-electric material response are given, and the coupled electro-m...

The servo control design for a piezo-electric dual-stage instrumented suspension to achieve windage vibration reduction for high track density recording is presented in this paper. The servo design exploits the information available from both the sampled position error signal (PES) and a continuous time instrumented suspension signal (ISS) available from an instrumented suspension. The ISS from...

The process of capturing the energy from a system’s environment or surrounding and converting it into usable electrical energy is termed as energy harvesting. One form of energy harvesting is to employ piezoelectric materials to harvest energy from vibrating structures. These materials have the ability to absorb the mechanical energy and transform it into electrical energy that can be used to p...

Introduction MicroChannel Fabrication Experimental Apparatus and Methodology Results and Discussion Summary and Conclusions CHAPTER 4 MICROPIV MEASUREMENT OF TURBULENT FLOW IN RECTANGULAR MICROCHANNELS WITH VARYING AS­ PECT RATIOS Abstract Introduction MicroChannel Fabrication Experimental Methodology Experimental Setup Measurement Error Results and Discussion Summary and Conclusions CHAPTER 5 ...

at the moment determining of the pulse wave main parameters using a piezo sensor is performing using the RC adjustments in the circuit. With the increasing adaptation of the virtual instrumentation it is possible to reduce the RC complexity. The purpose of this work was to determine the piezoelectric actuator transfer function according to the signal of the air pressure sensor using virtual ins...

In magnetic disk drive actuators, the application of piezo electric material can be used to re ne and accomplish track following in (extremely) high track density magnetic data storage. In this paper the results on the modeling and control of a piezobased milli-actuator are presented. The modeling is done on the basis of a least squares curve tting of an estimated frequency response and taking ...