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Modelling of Hysteresis
In order to model a real system, differential equations are usually derived, which are based on physical principles. When modelling a characteristic hysteresis, the mathematical equations are also based on the physics underlying hysteresis, but they are nonlinear effects. Therefore, a different approach is taken in the modelling. A measurement is used as the basis for modelling. This means that a specific measurement curve that determines the parameters must first be available. The advantage of this method is that it can be applied to many technical fields. The method presented here can be verified using the example of piezo elements, but it can also be applied to the magnetization characteristic of ferromagnetic materials. The methods of Preisach and Mayergoyz are presented and explained in this booklet. Examples are calculated with Matlab. The Matlab source code is printed at the end.
Deep Learning, an introduction with two nice short examples
This booklet introduces the most important basics of deep learning. It describes the very frequently used method of how a computer can learn using neural networks and training data and apply what it has learned to other questions similar to the training data. Two simple about 'one-pager' examples in Python show how training a neural network with forward and back propagation works and how the trained system can process simple forms of artificial thinking. The two short Python programs "Learning truth tables" and "Recognizing a questionnaire" are printed in full and are easy to follow.
Communication of drones telemetry using a flight controller
The multicopters are particularly suitable for dealing with the topics of telemetry or photo flights with UAV, Unmanned Air Vehicles. They allow to float in one place. This also enables a particularly good data transfer to the ground. In addition, very good pictures can be taken and transmitted in this way. This publication deals with the transmission of telemetry and image data with an octocopter and their visualization at a ground station, using a flight controller.
Fascination Quadcopter
For quadcopters there are many names. They are also called quadrocopter, quadricopter, drone, multicopter or simply 'UFO'. This type of model construction is very young. It began early in the new millennium with commercial products for flying camera inspections. One sees quadcopters in all sizes and price ranges on the market. They start with the toy quadcopters, which are small and, despite their low price, often surprisingly robust. In this model division, a similar trend can be observed as with helicopter and airplane models. The smaller and cheaper systems are often built as ‘ready to fly’, while larger systems are often available as kits. Contents: - Functionality - Ready to fly quadcopters - Components - GPS, photo and film flight - Flight mechanics - Setting the controller - Dimensioning of motors and propellers - Special shapes, tri-, hexa- and octocopters - Initial operation, sources of errors and flight
Fascination Multicopter
The model-making sector of multicopters is very young. It started at the beginning of the new millennium with commercial products for flying camera inspections. Hobby users were able to fly their first systems in 2005, when the first toy companies launched relatively inexpensive toys with four propellers arranged horizontally. It was not until today's microprocessor technology, which can evaluate sensors for position stabilisation and change the speeds of the motors accordingly, that this fascinating subject became accessible for model building. This book is intended to help understand the functional principle, the motors, sensors, and control systems used and, on the other hand, to give an ...
Agricultural Informatics
Despite the increasing population (the Food and Agriculture Organization of the United Nations estimates 70% more food will be needed in 2050 than was produced in 2006), issues related to food production have yet to be completely addressed. In recent years, Internet of Things technology has begun to be used to address different industrial and technical challenges to meet this growing need. These Agro-IoT tools boost productivity and minimize the pitfalls of traditional farming, which is the backbone of the world's economy. Aided by the IoT, continuous monitoring of fields provides useful and critical information to farmers, ushering in a new era in farming. The IoT can be used as a tool to combat climate change through greenhouse automation; monitor and manage water, soil and crops; increase productivity; control insecticides/pesticides; detect plant diseases; increase the rate of crop sales; cattle monitoring etc. Agricultural Informatics: Automation Using the IoT and Machine Learning focuses on all these topics, including a few case studies, and they give a clear indication as to why these techniques should now be widely adopted by the agriculture and farming industries.
PID Parameter Tables for Control of Time Delayed Systems for Minimized ITAE and IAE Criterions
In this publication, parameter sets for PID controllers are presented, which can be used to control systems with time-delayed stable step responses. These parameter sets minimize the quality criteria in the time domain, IAE, ITAE and ISE. They also take into account the controller output limitation, which is relevant in practice. The parameter sets are scalable with the time constant and the static gain of the system. Therefore they can be used to control all systems with a time delay behavior.
The Big Book of Drones
Drones – or more precisely multicopters – have opened a whole new way of model making. Highly developed control electronics, powerful electric motors and high-performance batteries make things possible that were still science fiction until recently. At the same time, completely new applications have emerged: Photo and film flights, automated flights and action-packed FPV races make these models interesting for technology enthusiasts. Roland Büchi – a drone expert from the very beginning – provides all the information you need in this book if you want to get involved with multicopters. He offers beginners the information they need for a successful start and advanced pilots the basics...
Brushless Motors and Controllers
In recent years, brushless DC motors and controllers have begun an unparalleled triumph in model construction and in all technical fields. This book is intended to show how a brushless motor works. The basic principle is discussed first, before all the key terms such as kV and rpm/V, operating voltage, load and idle current, torque, turns, electrical and mechanical power, losses, efficiency, etc. are explained. A brushless motor can't work without a brushless controller, it requires a three-phase AC voltage. To increase the speed properly, the controller must have information on the rotor position. This can be done by Hall sensors or directly via the motor windings. All that will be taken into account in the book.
Exercises in Electronics
Exercises in Electronics, Operational Amplifier Circuits is a collection of examination papers and their solutions for Bachelor and Master Students. Prof. Dr. Roland Büchi is teaching at Zurich University of Applied Sciences, School of Engineering.
