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Environment detection is important task for an autonomous robot. Obstacle avoidance is a must when the robot do indoor activity. I this case robot movement is done in corridors and rooms, which is similar to a maze. Distance from the walls can be sensed with different sensors, in the experiment infra-red sensors were used. There are several methods for obstacle detection and calculating the distance...
Industrial energy consumption represents a large part of the energy flow in world. Industry furnaces belong to group with high energy consumption. Mathematical modelling and simulation cases appear as suitable tools, methods for decreasing energy consumption in this field. A simulation model has been used to determine the best geometry and working parameters of kiln by aim to reduce specific energy...
This paper presents an Integrated Urban Wastewater System based on the interconnection of two benchmark models used in the case of sewer networks and wastewater treatment plants. Some control strategies are applied for the sewer network and the wastewater treatment plant and analyzed considering the resulted integrated system. The final aim is to improve the knowledge regarding the interaction between...
In this paper, a solution for the mathematical modeling and control of the seamless steel pipes heat-treating process is proposed, considering as case study the annealing procedure. The proposed mathematical modeling procedure is based on analytical identification. In order to implement the proposed temperature control structure, the neural networks are used for learning the behavior of the system...
The paper is devoted to computerized optimization of vehicle and crew schedules in municipal and regional bus transport. Vehicle scheduling problem can be formulated as an integer linear program which is solvable by means of so called solver. Minimization of the number of required vehicles and minimization of dead kilometers are the fundamental objectives of optimization. Running board for a bus is...
The paper deals with numerical solution for time fractional-order diffusion-wave equation using explicit finite difference method in the web service form. This equation describes process of diffusion, process of heat conduction, process of fluid flow, process of mechanical vibration etc., which are part of technological processes in various fields of industry. In the paper is described mathematical...
Underground coal gasification (UCG) represents a technology, which can mining coal from a difficult to access coal deposits and coal beds with tectonic faults. This technology is also less expensive than conventional coal mining. In UCG can be measurable a lot of process variables with a common measuring devices and techniques but there are a variables that can not be mesured so easily e.g. underground...
In this paper we study a nontraditional model for the real-world situation which can occur in bus scheduling problem. It is motivated by the question: What minimal shortenings of the driving time should be made in some sections of an existing bus schedule (on a given transport network) to obtain optimal schedule? We show that this problem can be formulated as LP problem. First we formulate a new model...
This paper exposes the Control technology embedded in a propeller propulsion for Unmanned Aerial Vehicle (UAV). The system relies on systems combining low-cost sensors, embedded controller and control algorithms based on aerodynamics models. Presented results are for standard propeller assignment and advanced assignment using the variable pitch propeller and its algorithms.
The paper deals with the model-based compensation of friction in velocity and position controlled servomechanisms. A class of single degree of freedom mechanical systems with friction nonlinearity acting at the plant input is considered. Two approaches to friction compensation using dynamic model-based feedforward control and disturbance observer based feedback control are studied and compared to...
Almost any e-Learning system provides various functionalities, ranging from general ones like accessing a course or communication with peers, to more specialized functions like providing personalized feedback or learning materials. Among the features that may increase the quality of on-line education environments there is feeding learners with personalized set of quizzes depending their current knowledge...
The problem of active vibration control of weakly damped mechanical structures is potentially unstable modes of vibrations due to the positive feedback for some vibration modes. The paper will discuss the change of positive feedback on the negative one using all-pass discrete-time filters which are arranged in a cascade. The piezoelectric actuator as a source of force is used to damp vibration. It...
Variable speed drives (VSDs hereafter) are usually very dynamic systems that dispose of high power and very fast time responses. For this reason the VSDs control and electrical parts should be optimally tuned to achieve the target operation abilities. But if the VSDs are able to work in an optimal way, it is necessary to know a lot of VSDs parameters. Some of them are concerning about mechanical parts...
Shaping the transient response of incommensurate fractional order systems is a challenge. In this paper, incommensurate fractional order controllers are employed to control a two-order incommensurate fractional order system. An appropriate RST control structure is employed to construct a closed loop system with a commensurate fractional order transfer function. Then, the characteristic ratios of this...
In the design and synthesis of control systems in industrial companies, we have to face lots of unexpected problems caused by interactions between control systems with human operators (automated control systems) and control systems with no human operators (automatic control systems). While there are plenty of recommendations for design, synthesis and optimization of automatic control systems, in case...
Cyber-Physical Systems (CPSs) represent a new generation of engineered systems facing significant scientific challenges in terms of modeling, architecture, distributed computations and network control, verification/validation mechanisms, and many others. CPSs modeling, a significant aspect of their design and development, can be performed using the Model-Driven Engineering (MDE) paradigm. This approach...
In this paper we present a C programming language implementation of a predictive control algorithm. The code was compiled and run under the same set of hypotheses using a standard open-source C compiler, and on three real time platforms, each with different technical specifications.
Decentralized robust control of infinite-dimensional systems is considered. A decentralized robust controller design approach for such systems is proposed. In this approach, overlapping decompositions is first used to obtain local models. An error function, which depends on frequency, is then derived. The proposed approach then uses the local models and the derived function to design decentralized...
The advent of social media in education has the potential to foster collaborative learning. Exploring students' interactions on the social media tools is an important research direction, which could bring an insight into the collaborative learning process. Therefore, our aim is to propose a conceptual framework for knowledge extraction and visualization from a social media-based learning environment...
The paper is devoted to the desired model method. It is simple and effective controller tuning method which allows tuning of conventional analog and digital controllers for controlled plants with time delay for the desired relative overshoot. Its derivation is described in detail and the detailed analysis of its properties is performed. The use of the desired model method is shown in the example.
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