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JOURNAL "INFORMATION TECHNOLOGIES AND CONTROL"
HOME EDITORS ISSUES TEMPLATE INFORMATION
28/03/2024 PAPERS - ISSUES

Year 2017 - Issue 2 Print ISSN 1312-2622 Online ISSN 2367-5357

OPTIMAL ALLOCATION OF RESOURCES AT RISKS OCCURRING IN THE NODES OF A NETWORK
V. Sgurev, S. Drangajov
Key Words Resources; risks; linear constraints; decision making; optimization.
Abstract A linear programming model is proposed for interpretation of the problem for allocation of resources between a finite number of consumption stores at which the risks occurring are considered. At that linear constraints are imposed between the resources in the detached points and between the risks occurring at that. Results are obtained related to reducing this problem to a general Linear Programming (LP) program in which optimal solution is sought for minimization of the expenses for allocation of the resources as well as for taking the risks. A numerical realization of the linear model proposed is carried out that confirms the theoretical results received
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MATHEMATICAL MODELLING AND EXTREMUM SEEKING CONTROL OF CASCADE OF TWO BIOREACTORS FOR PRODUCTION OF HYDROGEN AND METHANE
V. Lakov, E. Chorukova, I. Simeonov
Key Words Extremum seeking control; cascade control; anaerobic digestion bioreactors; biogas production optimization; non-linear models.
Abstract A mathematical model of a cascade of two continuously stirred anaerobic bioreactors is presented in this paper and the extremum seeking control is applied on it. The dilution rate of the first bioreactor is chosen as control action and the joint biogas flow rate both bioreactors is the measured output to be maximized. The concentration of inlet organics is accepted as the disturbance. The correction of the working volume of the second bioreactor is studied as the inner loop of the cascade control system. The outer control loop is represented by the extremum seeking controller, which finds the optimum control action and reacts to the disturbance. Computer simulation studies show the feasibility of this scheme
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WIRELESS KINECT-NAO FRAMEWORK BASED ON TAKAGI-SUGENO FUZZY INFERENCE SYSTEM
A. Lekova, A. Krastev, I. Chavdarov
Key Words Teleoperation; telerobotics, Takagi–Sugeno fuzzy system; view invariance; Microsoft Kinect V2; NAO robot.
Abstract In the context of learning new skills by imitation for children with special educational needs, we propose Wireless Kinect-NAO Framework (WKNF) for robot teleoperation in real time based on Takagi- Sugeno (T-S) Fuzzy Inference System. The new solutions here are related to complex wholebody motion retargeting, standing body stabilization, view invariance and smoothness of robot motions.
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DESIGN AND SETTING UP OF A LABORATORY DRIVE SYSTEM WITH REMOTE MONITORING AND CONTROL
V. Dimitrov
Key Words Asynchronous drive; soft starter; PLC; intelligent energy meter; remote monitoring and control
Abstract Systems for remote monitoring and control on energy consumption, efficiency and proper operation of the controlled objects are very often used in different spheres of industry, building automation, electricity distribution network etc. Various types of intelligent energy meters, PLCs and other control devices are involved in such systems. On the other hand, soft starters are widely used in industry and building automation for control on asynchronous drives when the speed regulation is not a mandatory requirement. They are cheaper than inverters and frequency converters and allow temporal reduction of the torque and current surge during start-up, as well as smooth deceleration. This is why the study of the principles of operation and setting up of intelligent energy meters, soft starters and PLC is very important. A laboratory system has been designed and built. An asynchronous motor is controlled by a soft starter and remote monitoring and control by contemporary devices has been provided. A methodology of design and setting up has been developed.
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