Input Design for Systems Under Identification as Applied to Ultrasonic Transducers

2010 ◽  
pp. 409-420
Author(s):  
Nishant Unnikrishnan ◽  
Yicheng Pan ◽  
Marco Schoen ◽  
Ajay Mahajan ◽  
Jarlen Don ◽  
...  
Keyword(s):  
Ultrasonic Transducers ◽  
Input Design

Input Design for the System Identification (IDSI) of an Ultrasonic 3D Position Estimation System

1999 ◽  
Author(s):  
Marco P. Schoen ◽  
Ajay Mahajan ◽  
Chien-Hsun Kuo ◽  
Sinchai Chinvorarat ◽  
J. K. Huang
Keyword(s):  
System Identification ◽  
Design Method ◽  
Random Excitation ◽  
Position Estimation ◽  
Ultrasonic Transducers ◽  
Data Set ◽  
Input Design ◽  
Improved Performance ◽  
Estimation System ◽  
Excessive Noise

Abstract The purpose of this work is to develop an input design for the system identification (IDSI) method for improved performance of a 3D position estimation system that uses multiple ultrasonic transducers. In this paper, an input design is proposed based on input/output data gathered from random excitation so as to excite all modes. The data set is then used to compose a new set of input data, from which the system is excited again and identified. The input design method is used for the system identification of ultrasonic sensor pairs (transmitter-receiver) so as to obtain an accurate model. This model is essential for the analysis of the system and its eventual optimization. Results are given that show the comparison of the actual output signal of the system and the output of the model obtained from the IDSI method as well as the identifiability indicator. It is shown that the IDSI is a useful method and improves system identification even in the presence of excessive noise.

Modelling of functionally graded piezoelectric ultrasonic transducers

2007 ◽  
Author(s):  
Wilfredo M. Rubio ◽  
Flavio Buiochi ◽  
Julio C. Adamowski ◽  
Emilio C. N. Silva
Keyword(s):  
Functionally Graded ◽  
Ultrasonic Transducers ◽  
Functionally Graded Piezoelectric

Ultrasonic transducers using PVDF

1991 ◽  
Vol 115 (1) ◽  
pp. 267-278 ◽  
Author(s):  
S. Hurmila ◽  
H. Stubb ◽  
J. Pitkanen ◽  
K. Lahdenpera ◽  
A. Penttinen ◽  
...  
Keyword(s):  
Ultrasonic Transducers

scholarly journals Encapsulation of Capacitive Micromachined Ultrasonic Transducers (CMUTs) for the Acoustic Communication between Medical Implants

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 421
Author(s):  
Jorge Oevermann ◽  
Peter Weber ◽  
Steffen H. Tretbar
Keyword(s):  
Data Security ◽  
Ultrasonic Transducers ◽  
Surrounding Tissue ◽  
Center Frequency ◽  
Medical Implants ◽  
Research Groups ◽  
Capacitive Micromachined Ultrasonic Transducers ◽  
Polyether Ether Ketone ◽  
High Bandwidth ◽  
Ether Ketone

The aim of this work was to extend conventional medical implants by the possibility of communication between them. For reasons of data security and transmitting distances, this communication should be realized using ultrasound, which is generated and detected by capacitive micromachined ultrasonic transducers (CMUTs). These offer the advantage of an inherent high bandwidth and a high integration capability. To protect the surrounding tissue, it has to be encapsulated. In contrast to previous results of other research groups dealing with the encapsulation of CMUTs, the goal here is to integrate the CMUT into the housing of a medical implant. In this work, CMUTs were designed and fabricated for a center frequency of 2 MHz in water and experimentally tested on their characteristics for operation behind layers of Polyether ether ketone (PEEK) and titanium, two typical materials for the housings of medical implants. It could be shown that with silicone as a coupling layer it is possible to operate a CMUT behind the housing of an implant. Although it changes the characteristics of the CMUT, the setup is found to be well suited for communication between two transducers over a distance of at least 8 cm.

scholarly journals Input Design for Active Dectection of Integrity Attacks using Set-based Approach

2020 ◽  
Vol 53 (2) ◽  
pp. 11094-11099
Author(s):  
Carlos Trapiello ◽  
Vicenç Puig
Keyword(s):  
Input Design
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