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Comparative study of discrete PSD controllers
Pelikán, Leoš ; Dvořáček, Martin (referee) ; Pivoňka, Petr (advisor)
This bachelor thesis deals with verification of heterogeneous structures of discrete PSD controllers on different process structures. Description of controlling system and various structures of PSD regulators is in theoretic part. The practical part of thesis describes progress testing, particular results and compare with adaptive an adaptive controller of B&R company.
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Comparative study of discrete PSD controllers
Vaňková, Tereza ; Dvořáček, Martin (referee) ; Pivoňka, Petr (advisor)
Bachelor’s thesis is focused on a verification of heterogeneous structures of discrete PSD controller depending on different process structures. The first theoretic part describes a continuous action controller, a transformation from the continuous to the discrete control and a discrete control loop (with issues like a sampling, a quantization, a signal shaping). Further there are described the concrete structures of the discrete PSD controllers – from the classical PSD controller over the variations with filtration in a derivative part to the structures with an elimination of the oscillation and the first overshoot. There are also mentioned two methods of controller parameters´ setting– second Z-N method (based on finding out critical parameters of the system) and a balanced setting of controllers. Second, practical, part of thesis contains particular results, which were found out by measuring on the simulation and real models. Finally achieved results are compared with an adaptive controller of B&R company.
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Comparative study of PID and PSD Controllers
Staněk, Viktor ; Dvořáček, Martin (referee) ; Pivoňka, Petr (advisor)
Description of PID and PSD controllers structures. Verification of function of heterogeneous structures of PSD controllers on typicall transfer functions. Respones to changes of input value. Effect of change of sampling period on PSD cotrollers. Verification of influence of derivative part of PS-D and S-PD controllers.
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Modeling of system motors with flexible component
Lebeda, Aleš ; Dvořáček, Martin (referee) ; Pivoňka, Petr (advisor)
This thesis deals with problem of experimental identification using principles of artificial intelligence and development of nonlinear models. It shows how to estimate parameters of nonlinear models and it compares different types of nonlinear models based on analytical analysis which were developed from measured data in simulation and real system motors with flexible component.
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Industrial PID controller with autotuning and visualisation
Vávra, Pavel ; Dvořáček, Martin (referee) ; Pivoňka, Petr (advisor)
This thesis deals with implementation of industrial used controlling block into Power Panel equipment of B&R in integrated development environment Automation Studio 3.0.71. It is PID controller with autotuner and visualization, which allowed bumpless transfer among controlling algorithms and manual control. PID and I-PD controllers with filtering of derivative action and dynamic antiwindup were implemented. Parameters of PID controller is possible to tune with the aid of ultimate gain and ultimate period according rules of Ziegler-Nichols. Ultimate parameters of controlled plant is possible to acquire with the aid of two identification methods, recursive least squares method and relay feedback. Recursive least squares method was implemented with directional forgetting. For relay feedback were used two types of relays: ideal and saturation relay for improving accuracy of searched ultimate values. The whole solution is programmed in ANSI C which Automation Studio supports. Created controller is control with the aid of touchscreen which is integrated in Power Panel. Trends of process values are viewed on the screen too. For comparison adaptive controller by B&R was implemented. This contoller is standardly supplied with Automation Studio in LoopConR library. All created algorithms were first validated on mathematical model of plant and then on real model in laboratory. The first part of thesis deals with theoretic analysis of used methods. The practical realization is described in the second part of this diploma thesis.
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Robust Controllers
Dobias, Michal ; Dvořáček, Martin (referee) ; Pivoňka, Petr (advisor)
This thesis tries to research the term “robust controllers”. Its aim is to compare the robustness of discrete PID controllers (Discrete Equivalent Continuous Controller, Discrete Impulse Area Invariant, Takahashi, Feed-Forward), adaptive discrete PID controllers (Discrete Impulse Area Invariant, Takahashi, Feed-Forward), optimal controllers (quadratic optimal), and adaptive optimal controllers (quadratic optimal) on chosen transfer functions. Its aim is also to check the influence of A/D and D/A converters. The aims to obtain are demarked at the beginning of the text and also there is an explanation of the term “robustness.” Later on there is a description and an approximation to each of the chosen kinds of controllers and the identification methods used in the thesis (for adaptive controllers the method of recursive least-squares was used). The Kharitonov's Theorem are made on the chosen transfer function. Next there is a description of the methods with which the robustness of the controllers will be tested. The first method is the integral criteria, particular ITAE criterion and quadratic criterion. The second one is the analysis of the generalised circle criterion. Furthermore there are various displays of the results obtained and their corresponding comments. The results obtained are graphically displayed and by means of these schemes the particular types of controllers are compared. All of the simulations and results obtained were acquired through the use of the program MATLAB- Simulink. In the end of the thesis there is an overall evaluation.
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Estimator in control systems with variable structure
Dvořáček, Martin ; Mikšánek, Vojtěch (referee) ; Pivoňka, Petr (advisor)
The thesis write about the linear discrete time incremental estimators. These are used for the choice of the best control system in systems with variable structure and further for direct control with status controller. There is an application of this on physical plane. In this paper PID variation controllers are discussed and optimized using Nelder-Mead Simplex Method. Feedback control with optimal PID is compared with control using linear discrete incremental estimators and status regulator.
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Návrh veletržní prezentace Mendelovy univerzity v Brně na veletrhu Gaudeamus
Dvořáček, Martin
The purpose of this Bachelor thesis is to create a suitable trade fair presentation for Mendel University in order to assist long-term promotional opportunities and to achieve established goals. The first section describes trade fairs and exhibitions as a field of study. The second section sets goals, analyzes results of market research, explores the Gaudeamus trade fair at Brno and the history our university has participating in the fair. Then thesis suggests a recommended presentation with ideas for years to come.
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Corporate Financing and Acquisition
Jeřábková, Zuzana ; Dvořák, Jiří (advisor) ; Dvořáček, Martin (referee)
The work deals with the acquisition financing, introduced us to the definition of terms of acquisition, acquisition finance and corporate loans. The corporate loan is used as a standard here. The work describes the characteristics of acquisition and operational(corporate) funding, and practical part of these two types of loans compares to bring practical knowledge about the differences in the structure, objectives and purpose of the acquisition loan. All this comparison is done on a project specific company, that actually provide both bank corporate loans, acquisition loans and financing for MBO. The reader is familiar with a summary comparing the two products, both in terms of banks and from the perspective of the client. In conclusion, specific generalizations are brought and the knowledge that reader, who is interested in an acquisition loan can help with his decision-making process.
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