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The subject of the study is a modelling of composite cantilever beam. The beam comprises two elastic outer layers made of aluminium and a magnetorheological (MR) fluid layer in between, sealed with silicone rubber. Data for identification were collected by testing the forced vibration of the beam. One of the beam ends was clamped in a holder located at the moving part of the electrodynamic shaker...
In the paper a novel robust controller design for switched discrete-time system is developed. Robust stability and performance is treated by pole-placement approach. LMI approximation of discrete-time pole region for prescribed stability degree and damping factor is employed. The respective robust stability condition for switched system is developed by applying Lyapunov stability condition on prescribed...
Pole-placement belongs to efficient tools in control system design, guaranteeing both stability and performance of closed loop system. In robust control design, so called LMI regions and the respective D-stability conditions have been developed recently. Concerning continuous-time systems, the pole regions respective to prescribed stability degree and damping factor are convex and can be directly...
The submitted paper deals with the verification of new technology of train management on specific rail route of using simulation model. In the introductory part the solved issue is describe and represents cycles of locomotives involved on transportation within the national rail network. In the next part selected simulation software is presented, which is used to handle the issue. Furthermore the input...
In this paper we briefly explain the main idea of business process management and its general importance as well as connected necessity of the unity of the technology and business perspectives. Then we discuss those general problems of modeling languages BPMN and ARIS which are important at the above mentioned business-technology border. As a basis for deriving the critical requirements for a language...
The study summarises the results of experimental testing of MR fluid behaviour in the squeeze mode under the action of magnetic field. Tests were done in the experimental setup using the vision system, specifically designed for the purpose of the research programme. Experimental data are compiled in the form of MR fluid free surface profiles.
This paper proposes a design approach of a simple algorithm detection system based on evaluating of LQ control performance index values, that is applicable on nonlinear dynamical systems described by Takagi-Sugeno model. The same approach has been used for linear dynamical system, however the question was, whether this method could be modified and applied in nonlinear system. Arbitrary state space...
Developing software for safety critical embedded systems requires extensive testing, and HIL (Hardware in the Loop) test has one of the most important roles in this testing process. Modern microcontrollers can provide opportunities to improve the efficiency and capability of traditional HIL testing. Many of these opportunities are connected to their internal so called Trace interfaces. This paper...
The paper presents a method for including initial conditions into the recursive constant and variable fractional-order derivative definition. The initial conditions are assumed to be in the form of time constant function. Results obtained with proposed numerical algorithm are compared with analog realization of fractional order inertial system. For constant orders analog models were built based on...
The paper presents the algorithm for optimal control and stabilization of the Observation-Tracking Device (OTD) placed on a deck of Unmanned Aerial Vehicle (UAV). For that purpose the method of LQR (linear quadratic regulator) has been used. Some of the numerical simulation results have been presented in that paper.
The performance portrait based optimal controller tuning may be considered as a generalization of the well known method by Ziegler and Nichols [1] that integrated an experimental plant identification with the controller tuning. Up to now, the performance portrait method (PPM) has been presented as a tool for robust and optimal controller tuning [4]–[6]. This paper presents its application as a new...
The identification and registration of vehicles at the entrance and exit into and from the private areas is an integral part of the safety operation. The most common solution is evidence in a paper form, usually in a book at the entry point. More recently, this problem is solved by using ERP systems, where information is being recorded to the database. The main disadvantage of these options is the...
This paper presents an essay of possibility analysis of an application of the special method of aerial guided bomb control during its homing on ground target. The discussed method was previously applied to axis motion control of gyroscope with three degrees of freedom. The method consist in using of the phase trajectories of control deviations. The switching of control forces in appropriate points...
Within the research, quality of control drilling vibrations for drilling of rocks was recorded. Prior to the determination research, it is necessary to verify hypotheses about the data, which states that data are from the same population for each type of rock. The paper deals with the possibilities of solving tasks with regard to the nature of the data measured. the R statistic software was used....
Many nonlinear control systems can be represented as a feedback connection of a linear dynamical system and nonlinear element. Popov and circle criterion use the frequency response of the linear system, which builds on classical control tools like Nyquist plot and Nyquist criterion. The Popov criterion gives sufficient conditions for stability of nonlinear systems in the frequency domain. It has a...
In this paper, we deal with distribution problems and discuss their restrictions, extensions and modifications including a possible application in agriculture. The Hitchcock transportation problem can be transformed to other problems using special constraints, and we show even to crop problems from the agriculture application area, but in real situations we must deal with uncertain data because the...
This paper describes practical created and validated of control unit on based single-chip computer for control of models of CNC machines. Today are CNC machines commonly used for serial production in industry. Their benefit is mainly in the speed and accuracy with which they can produce almost any product. The described model realizes the movement from point A to point B. This is a base that can be...
In this paper, a web based application for analysis of linear systems was designed as a web interface with MATLAB Builder NE based on ASP.Net platform. ZedGraph library code was chosen as the graphical outputs of web based application due to verification of its settings properties. The application is primarily intended for teaching means.
The paper is focused on description of the created simulator pipeline transport of backfill mixtures. Pipeline transport is one of the most important process of backfilling with paste mixtures. The composition of the backfill mixtures should take into account its influence on the final strength and transportability. The proposed simulator allows calculations of pipeline transport's output parameters...
Programmable logic controllers play an irreplaceable role in the control of technological processes. In the field of metallurgy, but also in in other industrial branches play an important role in processes of cooling and heating materials. One of the fields is then industrial heating furnace. The article aims to outline the possibility of modelling of thermal fields in the material and the implementation...
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