Fakulta elektrotechniky a informatiky / Faculty of Electrical Engineering and Informatics
Stálý URI pro tuto komunituhttps://hdl.handle.net/10195/3847
Práce obhájené před rokem 2008 jsou uloženy pouze v kolekci Vysokoškolské kvalifikační práce
Procházet
17 výsledky
Search Results
Článekpeer-reviewedpostprint Omezený přístup Generalized first-principle model of magnetic levitation(2023) Dušek, František; Tuček, Jiří; Novotný, Aleš; Honc, DanielSince its first demonstration more than a half century ago, magnetic levitation (MagLev) has gained eminent scientific attention from both the fundamental and applied points of view. In essence, MagLev shows highly nonlinear dynamics, described with nonlinear differential equations. Thus, in order to exploit the MagLev phenomenon, both mathematical models and control algorithms must be constructed. Frequently authors use simplifications of the model, and in doing so, limit the application of the MagLev model around a nominal operating point. In these simplified cases, the MagLev models may contain parameters that are not represented by proper physical quantities. Thus, in this work, we revised the issue of MagLev modelling from the first-principle approach. More specifically, we theoretically derived expressions for the interaction between the magnetic fields of the solenoid and a small magnetic object. The behaviour of the inductance on a distance from the solenoid was then described. The suggested MagLev modelling concept was verified experimentally, confirming the validity and correctness of the proposed MagLev mathematical model. The results presented here could thus be regarded as highly beneficial for formulating more complex MagLev designs exploitable in the field of model predictive control of the position of a levitating object.Konferenční objektpeer-reviewedpostprint Omezený přístup RCDue - experimental identification of continuous- and discrete-time models(IEEE (Institute of Electrical and Electronics Engineers), 2023) Dušek, František; Honc, Daniel; Novotný, AlešThe paper is devoted to the education and teaching of process control and automation. Various laboratory equipment is used to explain and better understand the theory and to gain practical experience. The authors have designed and developed a simple electrical dynamical system RCDue (dynamic model with passive RC components and Arduino Due as measurement and communication unit) that allows students to perform various laboratory experiments – e.g. static and dynamic characteristics measurements, modeling, experimental identification, control design and application of from the simplest strategies to advanced methods. Specifically, in this paper, the authors focus on experimental identification.Konferenční objektpeer-reviewedpostprint (accepted version) Omezený přístup Identification of Magnetic Levitation System(Springer Science and Business Media, 2021) Novotný, Aleš; Honc, Daniel; Dušek, FrantišekMagnetic Levitation Systems (MLS) are usually highly non-linear systems with a great sensitivity to the size of the control input. Therefore, special emphasis should be placed on the correct identification of all unknown MLS parameters. This paper describes the principle and procedure for identifying laboratory plant CE 152 MLS with an emphasis on automatically processing identification data. Moving-Average Filter (MAF) and Fast Fourier Transform Filter (FFTF) methods are compared to filtering input data noise. Key parameters are then estimated using the Least Squares Method (LSM). The results are verified in simulation and real-world experiment using a simple PID controller.Konferenční objektpeer-reviewedpostprint (accepted version) Omezený přístup Non-square Multivariable System Control Case Study – Static Optimal Compensator Design and Application(Springer Science and Business Media, 2021) Varga, Dominik; Honc, Daniel; Dušek, FrantišekBy multivariable decentralized control, changing one set-point in result acts as a disturbance to other control loops. This can be solved by using multivariable controller or compensator. In this paper, a novelty approach to control non-square eighth-order system with four inputs and three outputs is demonstrated using a static compensator that guarantees autonomy in the steady state (changing one input, affects one output) and also optimal solution for non-square overdetermined systems (systems with more manipulated variables than controlled variables). To evaluate the control quality of this method, the system is also controlled without static compensator for comparison.Konferenční objektpeer-reviewedpostprint (accepted version) Otevřený přístup RCDue - Laboratory System for Teaching Automation and Control - Concept of the system(IEEE (Institute of Electrical and Electronics Engineers), 2021) Dušek, František; Honc, Daniel; Mrázek, MichalPaper describes an implementation of a low cost but nontrivial laboratory system for automation and control theory teaching purposes. The system called RCDue consists of two parts - a dynamic system module and a control unit providing measurement, control and communication with MATLAB through USB serial port. Wiring of the dynamic system module can be modified to get a system of the desired behavior. Application example named as R5C4 with four RC circuits is described together with its mathematical model and calculated step responses. The system can be used in laboratory for practical education of C or MATLAB programming, modelling and identification or control theory subjects.Konferenční objektpeer-reviewedpostprint Otevřený přístup Static compensator for nonsquare systems – application example(Springer Nature Switzerland AG, 2020) Honc, Daniel; Dušek, František; Merta, JanThe paper deals with the decentralized control of multivariable systems with the number of manipulated variables greater than the number of controlled variables. Proposed static compensator ensures automatic creation of input/output pairs for the simple control loops. The compensator provides steady-state autonomy and unit gain of the controlled system. Steady-state gain matrix and vector of the off-sets are enough information for the compensator design. Laboratory example is presented to demonstrate innovative compensator design and its application.Článekpeer-reviewedpostprint Otevřený přístup Desired Terminal State Concept in Model Predictive Control: A Case Study(Hindawi limited, 2019) Dušek, František; Honc, DanielThe paper deals with an online optimization control method for dynamical processes called Model Predictive Control (MPC). It is a popular control method in industry and frequently treated in academic areas as well. The standard predictive controllers usually do not guarantee stability especially for the case of short horizons and large control error penalization. Terminal state is one way to ensure stability or at least increase the controller robustness. In the paper, deviation of the predicted terminal state from the desired terminal state is considered as one term of the cost function. Effect of the stability and control quality is demonstrated in the simulated experiments. The application area for online optimization methods is very broad including various logistics and transport problems. If the dynamics of the controlled processes cannot be neglected, the optimization problem must be solved not only for steady state but also for transient behaviour, e.g., by MPC.Konferenční objektpeer-reviewedpostprint Omezený přístup Static Compensator for Decentralized Control of Nonsquare Systems(Springer Nature Switzerland AG, 2019) Dušek, František; Honc, Daniel; Merta, JanThe paper deals with the decentralized control problem for linear multivariable systems with the number of manipulated variables equal or greater than the number of controlled variables. Proposed static compensator ensures automatic creation of input/output pairs for individual control loops. The compensator provides steady state autonomy and unit gain for the control loops. Steady state gain matrix of the controlled system and vector of offsets are sufficient infor-mation for the compensator design. Estimation of the gain matrix and offsets from the measured data is also proposed in the paper.Konferenční objektpeer-reviewedpostprint Otevřený přístup Software for Thermogravimeter(IEEE (Institute of Electrical and Electronics Engineers), 2019) Dušek, František; Honc, Daniel; Havlíček, Libor; Merta, JanSoftware for thermogravimeter constructed at the Department of Inorganic Technology, University of Pardubice is presented in the paper. Used hardware and design of the experiment is described briefly. Main part of the paper focusses to the software solution in MATLAB environment. Except control, plotting and data exporting tasks it was necessary to communicate with Eurotherm nanodac Recorder / Controller through the TCP/IP Modbus protocol and with Sartorius weigh cell through the serial USB ASCII-based protocol. Simple example of Constant Rate Thermal Analysis experiment is given at the end of the paper.Konferenční objektpeer-reviewedpostprint Otevřený přístup Modelling of Ball and Plate System Based on First Principle Model and Optimal Control(IEEE (Institute of Electrical and Electronics Engineers), 2017) Dušek, František; Honc, Daniel; Kizhakke Illom, Rahul SharmaThis paper presents modelling of ball and plate systems based on first principles by considering balance of forces and torques. A non-linear model is derived considering the dynamics of motors, gears, ball and plate. The non-linear model is linearized near the operating region to obtain a standard state space model. This linear model is used for discrete optimal control of the ball and plate system - the trajectory of the ball is controlled by control voltages to the motor.