A comprehensive simulation model for the infant-incubator-feedback system was developed in a Matlab/Simulink® environment to investigate all heat exchange relationships, variables and factors that have an influence on the overall thermo-neutrality of the environment. The model was also used to determine the benefits and limitations of using a convectively heated single-walled incubator in nursing preterm infants with very low birth weight < 1000 grams and low gestational age 28 weeks. The infant was modelled as one-lump with two layers; core and skin. The infant shape was approximated to a cylinder. The model incorporated all compartments of the infant-incubator system including core, skin, incubator air space, mattress, incubator walls, air-circulating fan, heating element, added oxygen (for resuscitation purposes), and humidification chamber, which has not previously been considered. The results of the simulation were in terms of the temperature variation over time, of the following parts of the system: core and skin temperatures and incubator air space temperature. Results of the simulation with added humidity showed that the body temperature of a 900 gram infant, with an initial body temperature of 35.5 ºC, did not reach the thermo-neutral range between 36.5-37.5 ºC in two hours, on air mode. Whereas, on skin mode, both core and skin temperature reached to 36.87 ºC and 36.5 ºC in two hours, and thus a thermo-neutral environment was achieved. These outcomes are consistent with clinical empirical reports. The simulation model is a closed-loop system with a PID controller for each mode; air servo controlled and skin servo controlled. The controller parameters were virtually estimated by the Zeigler-Nichols Method as real values were not available. Nevertheless, the overall stability of the whole system has been achieved by applying a step input which was verified by the Root Locus Method.

A comprehensive simulation model for the infant-incubator-feedback system was developed in a Matlab/Simulink® environment to investigate all heat exchange relationships, variables and factors that have an influence on the overall thermo-neutrality of the environment. The model was also used to determine the benefits and limitations of using a convectively heated single-walled incubator in nursing preterm infants with very low birth weight < 1000 grams and low gestational age 28 weeks. The infant was modelled as one-lump with two layers; core and skin. The infant shape was approximated to a cylinder. The model incorporated all compartments of the infant-incubator system including core, skin, incubator air space, mattress, incubator walls, air-circulating fan, heating element, added oxygen (for resuscitation purposes), and humidification chamber, which has not previously been considered. The results of the simulation were in terms of the temperature variation over time, of the following parts of the system: core and skin temperatures and incubator air space temperature. Results of the simulation with added humidity showed that the body temperature of a 900 gram infant, with an initial body temperature of 35.5 ºC, did not reach the thermo-neutral range between 36.5-37.5 ºC in two hours, on air mode. Whereas, on skin mode, both core and skin temperature reached to 36.87 ºC and 36.5 ºC in two hours, and thus a thermo-neutral environment was achieved. These outcomes are consistent with clinical empirical reports. The simulation model is a closed-loop system with a PID controller for each mode; air servo controlled and skin servo controlled. The controller parameters were virtually estimated by the Zeigler-Nichols Method as real values were not available. Nevertheless, the overall stability of the whole system has been achieved by applying a step input which was verified by the Root Locus Method.

Thesis (M.Eng.). / Written for the Dept. of Electrical and Computer Engineering. Title from title page of PDF (viewed 2008/07/29). Includes bibliographical references.

Στην παρούσα διπλωματική εργασία γίνεται εξομοίωση ενός κινητήρα τύπου ultrasonic με χρήση του προγράμματος simulink του matlab. Αρχικά αφού συγκεντρώθηκε όλη η απαραίτητη βιβλιογραφία σχετικά με τους Πιεζοηλεκτρικούς κινητήρες, γίνεται αναφορά στους προδρόμους του ultrasonic και μελετάται συγκεκριμένα ο πιεζοηλεκτρικός κινητήρας οδεύοντος κύματος τύπου ultrasonic (TWUM). Αναλύεται λεπτομερώς η δομή και η αρχή λειτουργίας του, καθώς και τα πλεονεκτήματα που παρουσιάζει. Η συμπεριφορά του, η λειτουργία του και οι εξισώσεις που τη διέπουν, αποτελούν το αντικείμενο της παραπάνω εξομοίωσης. Παρουσιάζονται λεπτομερώς τα αποτελέσματα της εξομοίωσης, τα οποία και πιστοποιούν το γεγονός ότι το μοντέλο που δημιουργήθηκε προσομοιώνει τη συμπεριφορά του κινητήρα σε μόνιμη και μεταβατική κατάσταση. Κατόπιν κατασκευάζεται πειραματική διάταξη όπου χρησιμοποιείται μία μηχανή συνεχούς ρεύματος ως φορτίο στον ultrasonic και λαμβάνονται μετρήσεις όταν το ηλεκτροκινητήριο σύστημα βρισκόταν σε μόνιμη και σε μεταβατική κατάσταση. Τέλος γίνεται σύγκριση των αποτελεσμάτων των παραπάνω μετρήσεων, αυτών που προέκυψαν από την εξομοίωση και των πειραματικών μετρήσεων. Διαπιστώνεται σύγκλιση μεταξύ τους, πράγμα που πιστοποιεί την επίτευξη του στόχου της παρούσας διπλωματικής εργασίας. / The aim of this thesis is the simulation of an ultrasonic motor using the simulink matlab program. Firstly, after selecting all the necessary bibliography on piezoelectric motors, reference was made to the precursors. The specific type of piezoelectric motor studied was a travelling wave ultrasonic motor one. A detailed analysis of the structure and the principle operation was undertaken. Moreover, this TWUM comes with a multitude of andvantages. Its behavior, its function and the equations that govern it were covered by the above simulation. Then, the results werw analyzed in detail.These testify to the fact that the model was createdto simulate the motor's behavior not only in steady state but also in transient. Next, an experimental device was constructed in which a DC motor was used as a load to the USM.Measurements were taken and finally, a comparison between the two sets of measurements was made. Those obtained by the simulation and the experimental measurements. A common pattern was observed between them which certifies the success of this thesis.

Ingeniero Civil / Una de las mayores interrogantes en Ingeniería Estructural corresponde a la caracterización de fenómenos no lineales. Estas no linealidades están presentes en una gran cantidad de casos, por lo cual un adecuado modelamiento es primordial. Sin embargo, los fenómenos no lineales pueden ser tan complejos que requieren de una alta carga computacional. En un sistema es posible encontrar diferentes tipos de no linealidades, que pueden depender de la forma, del material (i.e hormigón) o de componentes como aisladores y disipadores. Así, es posible encontrar en la literatura, modelos que determinen el comportamiento de distintos elementos y sistemas como el modelo de histéresis bilineal, modelo de Bouc-Wen, modelo para fuerzas de impacto, modelos de disipación, entre otros. Por otro lado, existen varios análisis que complejizan el problema, tales como tiempo-historia, análisis monotónicos incrementales, elementos finitos ó simulaciones estocástica. La realización de esto implica un gran costo computacional, debido a que los modelos contienen gran cantidad de detalles o es necesario identificar un gran número de escenarios posibles (incertidumbre en la estructura). De acá surge la necesidad de encontrar herramientas computacionalmente eficientes para modelar no linealidades. Recientemente se la demostrado que Simulink es una herramienta que arroja resultados eficientes a la hora de representar el comportamiento de elementos y sistemas complejos. En el presente trabajo, se desarrolla una librería de los elementos comúnmente utilizados en el control de vibraciones de estructuras para Simulink, y se desarrollan ejemplos de implementación con el fin de reducir la complejidad del problema, pero manteniendo las propiedades no lineales.

abstract: Hydrogen fuel cells have been previously investigated as a viable replacement to traditional gas turbine auxiliary power unit onboard fixed wing commercial jets. However, so far no study has attempted to extend their applicability to rotary wing aircrafts. To aid in the advancement of such innovative technologies, a holistic technical approach is required to ensure risk reduction and cost effectiveness throughout the product lifecycle. This paper will evaluate the feasibility of replacing a gas turbine auxiliary power unit on a helicopter with a direct hydrogen, air breathing, proton exchange membrane fuel cell, all while emphasizing a system engineering approach that utilize a specialized set of tools and artifacts. / Dissertation/Thesis / Masters Thesis Engineering 2016

Mutation analysis is a fault-based method used for introducing small changes into a program, producing mutants based on mutation operators, classes of commonly occurring faults. Mutation analysis has been used in the last couple of decades for evaluating how good test cases produced by software testing are at detecting faults. Software testing is the process of executing software based on certain input parameters and evaluating its behavior with the purpose of finding faults and making sure that the software works as expected.   In automotive systems, MATLAB Simulink is the facto standard for implementing the electronic control software of vehicle functions. As such, the application of software testing and mutation analysis to Simulink models becomes a crucial aspect for providing a framework to evaluate existing test cases by introducing mutations into these models.   In this thesis, we propose a mutation generation framework for Simulink by using a set of mutation operators defined based on our own classification based on the Simulink project structure and previously defined operators. Our method is supported by the tool SIMUTATOR, which we also introduce and apply on an industrial prototype called the Brake-By-Wire system. This work enables the mutation analysis of industrial Simulink models. In addition, we show how SIMUTATOR can be used together with SIMPAAL (a tool for transforming Simulink models to timed automata) and MATS (a tool for test generation) for mutation testing. The results show that SIMUTATOR is efficient and can be used successfully on industrial-sized Simulink software

This wokr describes mathematical model of electic machines. In beginning it shows transformation of values of asynchronous motor from one coordinate system to another, which i sused to create mathematical model. Next we use analogy between transformer and asynchronous motor to create equations, which describes motor. In the practical part are created models of transformer and asynchronous motor in MatLab SIMULINK. Later was created simulation of scalar and vector control on these models.

This work deals with the design and realization of a task with the elements of virtual reality, namely the simulation task for driving a vehicle. As a programming tool, Matlab/Simulink is used. The aim of the thesis is to create a simple simulator for the purposes of measuring the driver's response to standard stimuli and the description and evaluation of the driver-vehicle interaction. The individual chapters describe the VRML language, the Matlab/Simulink 3D Animation Library and cooperation with the blocks in this library. The realization of this work is the description and modification of the 3D model of the vehicle used for this purpose, as well as the description and construction of the dynamic model for driving the vehicle with subsequent implementation in the form of a vehicle simulator in the Matlab/Simulink environment. The conclusion of the work is to verify the functionality of the management simulator with the possibility of data recording.

This diploma thesis deals with the implementation of SIL and PIL simulation for the microcontroller Aurix TriCore TC277D performed in the Matlab Simulink. The realization of the simulation represents, among other things, the implementation of the simulated model into the microcontroller, as well as the creation of an interface for the communication of the microcontroller with the Matlab Simulink. The accuracy of SIL and PIL simulations was verified by comparing the simulated waveforms from the simulation in Simulink. The simulated model used a thermal model of a car cabin created in the previous bachelor's thesis of the author of this diploma thesis. The model in TC277D, as well as the configuration for SIL / PIL is created for use with the C programming language. The work also includes instructions according to which the model and configuration can be modified so that the simulations can be performed on any device containing the necessary software. From the comparison of the simulated data is it clear that the created configuration can be used for SIL or PIL simulation.