Ondrej Andrs

Energy Harvesting from Mechanical Shocks Using a Sensitive Vibration Energy Harvester

This paper deals with a unique principle of energy harvesting technologies. An energy harvesting device generates electric energy from its surroundings using some kind of energy conversion method. Therefore, the considered energy harvesting device does not consume any fuel or substance. The presented energy harvesting system is used forenergy harvesting of electrical energy from mechanical shocks. The presented energy harvesting system uses a very sensitive vibration energy harvester, which was developed for an aeronautic application at Brno University of Technology. This energy harvesting system is a complex mechatronic device, which consists of a precise mechanical part, an electromagnetic converter, power electronics (power management) and a load (e.g., wireless sensor). The very sensitive vibration energy harvester is capable of usingthe mechanical energy of mechanical shocks and it can harvest useful energy. This energy harvesting system is used with a wireless temperature sensor and measured results are presented in this paper.

Simulation modelling of mechatronic system with flexible parts

This paper deals with a simulation modelling of developed mechatronic systems, which contain a flexible behaviour of individual mechanical parts. The developed process usually contains ideal models of rigid mechanical system. The presented simulation model consists of a mechanical multi-body system with flexible parts, models of actuators, sensors and control and it is used for the development of this system with respect of the mechatronic approach. The dynamic behaviour of the whole model is analysed and the flexible properties of the mechanical system are considered. The co-simulation technique is used for this task in which the multi-body model of the developed system in ADAMS is controlled by a model in Matlab/SIMULINK environment. The complex model of the developed mechatronic system can be used as the virtual prototype of the real system and its behaviour can be tested and analysed.

Design of Fuzzy Logic Controller for DC Motor

This contribution presents a simple and efficient approach to the fuzzy logic controller design and simulation. The proposed controller uses a Sugeno type fuzzy inference system (FIS) which is derived from discrete position state-space controller with an input integrator. The controller design method is based on anfis (adaptive neuro-fuzzy inference system) training routine. It utilizes a combination of the least-squares method and the backpropagation gradient descent method for training FIS membership function parameters to emulate a given training data set. The proposed fuzzy logic controller is used for the position control of a linear actuator which is a part of a Stewart platform.

Model-Based Design of Mobile Platform with Integrated Actuator – Design with Respect to Mechatronic Education

This paper deals with a model-based design of an actuator for a mobile platform. This paper presents way how to use model-based design of this mechatronic system with respect to mechatronic education. The presented mobile platform is used for shifting of a load in defined linear trajectory. Platform speed, maximal weight of the load and capacity of battery are used for the optimal actuator design. The actuator has to be integrated inside platform housing and it is limiting factor for design of this system. Several steps of model-based design are presented with respect of mechatronic approach and these steps are well known for our mechatronic students. The presented approach provides way how to develop such mechatronic system based on the model.

Introduction to design of speed controller for fuel pump

This contribution presents an efficient approach to design of speed controller for fuel pump. The fuel pump is used for two-shaft turbine engine concept with reducer driven by a free turbine. Controlling the amount of fuel injection into the combustion chamber is based on the speed control of the fuel pump which is controlled by the engine control unit according to the desired power mode. The resulting flow of fuel into the combustion chamber beside the pump speed regulator influences the bypass which constricts the return fuel according to pressure in the nozzles. Control characteristic of the bypass controller is fixed and is determined by its structure. The only adjustable parameter is the speed of the fuel pump. This paper describes the design procedure of this fuel pump using a two-level controller with speed and subordinate current-torque control.

Simulation modelling of water-supply network as mechatronic system

Mechatronics as an interdisciplinary field, which combines knowledge from multiple fields uses a comprehensive approach in the design of any technical object. It combines the requirements and their integration into all subsystems of the technical object. This approach, which is described by the VDI 2006 norm, can generally be used in the suggestion of regulation for the pressure pipe networks.

Laboratory delta robot for mechatronic education purposes

The article proposes educational example of applied mechatronics at Brno University of Technology, Faculty of Mechanical Engineering. The example is based on design of the delta robot with mounted camera for the image recognition (via particle swarm optimization) and its cataloging. The example is divided into several tasks including the constructional design, kinematics analysis, control and image recognition. The article describes particular tasks and briefly introduces to its solution.

Using Industry 4.0 Technologies for Teaching and Learning in Education Process

It is a well-known fact that if the teaching of theoretical knowledge is supplemented by practical exercises, greater learning efficiency is achieved. This contribution shows in this regard the modernized task of measuring asynchronous motor characteristics using Industry 4.0 advanced technologies. The introduced modernization consists in the improvement of obsolete measurement by automated data collection with the possibility of subsequent processing, archiving, visualization and creation of a measurement report. The whole solution is implemented through DAQ devices from National Instruments and Microsoft SQL Server.

DESIGN OF THE PUMP CONTROLLER OF THE LOW PRESSURE SEWER NETWORK

The paper deals with the low pressure sewer networks which are used for the systematic drainage of wastewater in locations where it is not technically possible, respectively economically advantageous to build a gravity sewer network. With regard to the size of the urban area, town or drainage site these systems can be very large, involving tens or hundreds of independently working pumps that are connected to the common pipeline system. The right one, or rather the optimal topology design of such a system and performance parameters of its elements is therefore a great challenge. The subsequent operation of the low pressure sewer network system also requires a considerable know-how, particularly with regard to the fact that these are technically complex systems with many components which exhibit a variety of typical operating defects. The removal of these disorders requires a deep understanding of the issues, experience, and availability of adequate industrial solutions. One of the possible failures of the low pressure sewer network is clogging of the pipelines with sediment from wastewater. The following text describes the technical way to prevent the clogging of the pipeline of a low pressure sewer network. This paper presents an intelligent flushing system which is developed within the research project reg. No. TA04010023 at the Faculty of Civil Engineering, Brno University of Technology.

Model Based Design of Fuel Pump Control

This paper presents a co-simulation method to design of speed controller for turbojet fuel pump. Expected fuel pump is used for small turbine engine concept with reducer driven by free turbine. The amount of injected fuel into the combustion chamber is based on the speed of the fuel pump which is controlled by the engine control unit. The final flow of fuel into the combustion chamber is restricted by fuel bypass which constricts the return fuel according to pressure in the nozzles. This back fuel bypass has nonlinear and fixed characteristic determined by its structure. The only way how to control the amount of incoming fuel to the engine is the pump speed control. Effect of the bypass represents a variable component in the fuel pump load and from the view of the speed controller it is a disturbance variable. This paper describes the co-simulation model based on the use of MATLAB/Simulink and MSC Adams environment. This simulation uses interconnection of Simulink controller design and simplified model of the fuel pump dynamics in Adams (without hydraulic modelling).