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Solving the Problem of Discrete Process Control Synthesis Using Optimization on a Sliding Interval

Zhazira Julayeva Waldemar Wójcik Gulzhan Kashaganova Kulzhan Togzhanova Saken Mambetov
International Journal of Electronics and Telecommunications | 2023 | vol. 69 | No 2 | 383-389 | DOI: 10.24425/ijet.2023.144374
Keywords discrete process control optimization sliding interval closed loop control system equation of a closed loop system
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Abstract

The paper presents a solution to the problem of synthesis of control with respect to the sliding interval length for the optimization of a class of discrete linear multidimensional objects with a quadratic performance criterion. The equation of motion of a closed multidimensional discrete system in the general non-stationary case is derived based on the length of the optimization interval and their main properties. The closed-loop is fitted with a signal representing the predicted values averaged over the whole sliding interval of optimization with a certain weight. A problem with a sliding optimization interval may not require a real-time solution by means of a sequence of solutions on compressed intervals. Therefore, the study of control systems with optimization on a sliding interval is of undoubted interest for a number of practically important control problems.
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Authors and Affiliations

Zhazira Julayeva
1
Waldemar Wójcik
2
Gulzhan Kashaganova
3
Kulzhan Togzhanova
4
Saken Mambetov
4
  1. Academy of Logistics and Transport, Almaty Technological University, Almaty, Kazakhstan
  2. Lublin University of Technology, Lublin, Poland
  3. Turan University and Satbayev University, Almaty, Kazakhstan
  4. Almaty Technological University, Almaty, Kazakhstan

Robustness of closed-loop glucose control systems

Artur Wyciślok Jarosław Śmieja
Archives of Control Sciences | 2023 | vol. 33 | No 3 | 681–705 | DOI: 10.24425/acs.2023.146964
Keywords artificial pancreas closed-loop control insulin pump type 1 diabetes
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Abstract

The main purpose of this work is to provide an extensive, simulation-based comparison of robustness of PID and MPC algorithms in control of blood glucose levels in patients with type 1 diabetes and thus answer the question of their safety. Cohort testing, with 1000 simulated, randomized patients allowed to analyze specific control quality indicators, such as number of hypoglycemic events, and length of hypo- and hyperglycemia periods. Results show that both algorithms provide a reasonable safety level, taking into account natural changes of patients’ physiological parameters. At the same time, we point out drawbacks of each solution, as well as general problems arising in close-loop control of blood glucose level.
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Authors and Affiliations

Artur Wyciślok
1
ORCID: ORCID
Jarosław Śmieja
1
  1. Department of Biology and Systems Engineering, Silesian University of Technology, Gliwice, Poland

Experimental Observation Of Nonlinear Vibrations Using A Closed-Loop Vibration System

Everaldo De Barros Carlos D’andrade Souto Mauro Hugo Mathias
Metrology and Measurement Systems | 2015 | vol. 22 | No 4 | 559-564
Keywords nonlinear vibrations closed-loop vibration system nonlinear structural dynamics cantilever beam
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Abstract

This paper presents experimental observation of nonlinear vibrations in the response of a flexible cantilever beam to transverse harmonic base excitations around its flexural mode frequencies. In the experimental setup, instead of manual control of the signal excitation frequency and amplitude, a closed-loop vibration system is used to keep the excitation amplitude constant during the frequency sweep and to increase confidence in the experimental results. The experimental results show the presence of the third mode in the response when varying the excitation frequency around the fourth mode. The frequency-response curves, response spectrum and Poincaré plots were used for characterization of nonlinear dynamic behaviour of the beam.
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Authors and Affiliations

Everaldo De Barros
Carlos D’andrade Souto
Mauro Hugo Mathias

Battery/super-capacitor HESS applied in DC microgrid

Zhen Zhang Baoge Zhang Donghao Wang Ping Li Yao Rong
Archives of Electrical Engineering | 2020 | vol. 69 | No 2 | 379-388 | DOI: 10.24425/aee.2020.133032
Keywords battery bi-directional DC/DCconverter HESS super-capacitor voltage closed-loop
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Abstract

Energy storage technology (EST) is an effectiveway to improve the power quality of renewable energy generation (such as solar energy and wind energy), but a single energy storage system (ESS) is difficult to meet the demand for the safe operation of the grid. According to the structure and operation characteristics of the existing battery/super-capacitor hybrid energy storage system (HESS), a battery/super-capacitor HESS is proposed. The working principle and three working modes (the super-capacitor pre-charging cold stand-by mode, the boost mode and buck mode) of the HESS are analyzed in detail. The state equations of the boost mode and buck mode are derived. The state space average method is used to establish the small signal equivalent model under the buck/boost mode. More-over, the charge and discharge control strategy of the HESS is obtained by combining the voltage closed-loop control. The simulation model is built in Matlab/Simulink to verify the effectiveness of the proposed HESS and its control strategy. The results show that the HESS and its control strategy can ensure the DC bus voltage has good stability and superior anti-interference, and it can simultaneously provide large current, increase the battery life, and improve the technical economy of energy storage.

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Authors and Affiliations

Zhen Zhang
Baoge Zhang
ORCID: ORCID
Donghao Wang
Ping Li
Yao Rong

The real-time simulator using MATLAB/Simulink software for closed-loop coordination protection devices testing

Adam Smolarczyk Sebastian Łapczyński Michał Szulborski Łukasz Kolimas Łukasz Kozarek
Bulletin of the Polish Academy of Sciences Technical Sciences | 2021 | 69 | 4 | e137413 | DOI: 10.24425/bpasts.2021.137413
Keywords real-time simulator distance protections protection relays testing closed-loop testing MATLAB/Simulink
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Abstract

This paper aims to discuss the behavior of the proprietary real-time simulator (RTS) during testing the coordination of distance relay protections in power engineering. During the construction process of the simulator, the mapping of various dynamic phenomena occurring in the modeled part of the power system was considered. The main advantage to the solution is a lower cost of construction while maintaining high values of essential parameters, based on the generally available software environment (MATLAB/Simulink). The obtained results are discussed in detail. This paper is important from the point of view of the cost-effectiveness of design procedures, especially in power systems exploitation and when avoiding faults that result from the selection of protection relay devices, electrical devices, system operations, and optimization of operating conditions. The manuscript thoroughly discusses the hardware configuration and sample results, so that the presented real-time simulator can be reproduced by another researcher.
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Bibliography

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Authors and Affiliations

Adam Smolarczyk
1
ORCID: ORCID
Sebastian Łapczyński
1
ORCID: ORCID
Michał Szulborski
1
ORCID: ORCID
Łukasz Kolimas
1
ORCID: ORCID
Łukasz Kozarek
2
ORCID: ORCID
  1. Warsaw University of Technology, Faculty of Electrical Engineering, Electrical Power Engineering Institute, 00-662 Warsaw, Poland
  2. ILF Consulting Engineers Polska Sp. z o.o., ul. Osmańska 12, 02-823 Warsaw, Poland

Design of Supply Chain Network to Reduce Impacts of Damages during Shipping

Mastoor M. Abushaega Yahya H. Daehy Saleh Y. Alghamdi Krishna K. Krishnan Abdulrahman Khamaj
Management and Production Engineering Review | 2021 | vol. 12 | No 2 | DOI: 10.24425/mper.2021.137674
Keywords supply chain network damage recovery scenarios closed loop supply chain type I and typeII errors
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Abstract

Recently, the expand of industrial market has led to have long supply chain network. During the long shipment, the probability of having damaged products is likely to occur. The probability of having damaged products is different between stages and that could lead to higher percentage of damaged products when arrived at retailers. Many companies have rejected the entire shipment because the damaged product percentage was higher than that agreed on. Decision-makers have tried to reduce the percentage of damaged products that happened because the transit, loading unloading the shipment, and natural disasters. Companies started to implement recovery centers in the supply chain network in order to return their system steady statues. Recovery models have been developed in this paper to reduce the damaged percentage at minimum costs to do so. Results show that the possibility of implementing an inspection unit and a recovery centers in the system before sending the entire shipment to the retailer based on examining a sample size that has been selected randomly from the shipment and the minimum cost of committing type I and type II errors. Designing a methodology to minimize the total cost associated with the supply chain system when there is a possibility of damage occurring during shipping is the objective of this research.
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Authors and Affiliations

Mastoor M. Abushaega
1 4
Yahya H. Daehy
2
Saleh Y. Alghamdi
3
Krishna K. Krishnan
2
Abdulrahman Khamaj
1
  1. Industrial Engineering Department, Jazan University, Jazan, KSA
  2. Industrial and Systems Engineering Department, Wichita State University, Wichita, KS, USA
  3. Industrial Engineering Department, King Khalid University, Abha, KSA
  4. Industrial and Systems Engineering Department, University of Oklahoma, Norman, OK, USA

Influence of addition of shredded rubber waste on deformability of binder-bound anthropogenic material mixtures

Konrad Walotek Joanna Bzówka Adrian Ciołczyk
Archives of Civil Engineering | 2021 | vol. 67 | No 4 | 207-223 | DOI: 10.24425/ace.2021.138495
Keywords closed loop economy coal mining slate silica fly ash rubber waste deformability digital imagecorrelation (DIC)
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Abstract

Construction is one of the industrial sectors responsible for the use of large quantities of natural raw materials. This fact makes it necessary to look for new technologies of producing construction materials based as much as possible on waste materials. Such a solution could have positive effects on the environment and reduce construction costs. This paper presents the results of a study on the deformability of a mix made from anthropogenic waste combined with a hydraulic binder. The presented mixes consist of unburnt coal mining slates (mine waste), shredded rubber waste, silica fly ash and CEM I 42.5 R cement. Samples with two different contents of shredded rubber waste 0% and 10% were made from the mixtures and subjected to destructive compressive strength testing. The strength testwas combined with sample deformation measurement performed with the Aramis 3D Video Correlation System. The results presented show the effect of the shredded rubber waste content on the deformability of the sample.
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Authors and Affiliations

Konrad Walotek
1
ORCID: ORCID
Joanna Bzówka
1
ORCID: ORCID
Adrian Ciołczyk
1
ORCID: ORCID
  1. Silesian University of Technology, Faculty of Civil Engineering, Akademicka 5, 44-100 Gliwice, Poland

Detector diode circuit noise measurement and power supply method selection for the fiber optic seismograph

Sławomir Niespodziany Anna T. Kurzych Michał Dudek
Opto-Electronics Review | 2021 | 29 | 2 | 71-79 | DOI: 10.24425/opelre.2021.135830
Keywords fiber optic sensor fibre optics rotational seismograph closed-loop detector diode avalanche photodiode noise spectral density
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Abstract

This paper investigates the noise levels present at various points in the FOSREM type fiber optic seismograph. The main aim of this research was to discover magnitudes of noise, introduced by various components of the analog and optical circuits of the device. First, the noise present in the electronic circuit without any optics connected is measured. Further experiments show noise levels including the detector diode not illuminated and illuminated. Additional tests were carried out to prove the necessity of analog circuitry shielding. All measurements were repeated using three powering scenarios which investigated the influence of power supply selection on noise. The results show that the electronic components provide a sufficient margin for the use of an even more precise detector diode. The total noise density of the whole device is lower than 4⋅10−7 rad/(s√Hz). The use of a dedicated Insulating Power Converter as a power supply shows possible advantages, but further experiments should be conducted to provide explicit thermic confirmation of these gains.
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Bibliography

  1. Rajan, G. Optical Fiber Sensors: Advanced Techniques and Applications. (CRC press, 2017).
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  8. Yu, Q. & Zhou, X. (2011) Pressure sensor based on the fiber-optic extrinsic Fabry-Perot interferometer. Photonic Sens. 1(1), 72–83 (2011). https://doi.org/10.1007/s13320-010-0017-9
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Authors and Affiliations

Sławomir Niespodziany
1
ORCID: ORCID
Anna T. Kurzych
2
ORCID: ORCID
Michał Dudek
2
ORCID: ORCID
  1. Institute of Heat Engineering, Warsaw University of Technology, 21/25 Nowowiejska St., Warsaw 00-665, Poland
  2. Institute of Technical Physics, Military University of Technology, 2 gen. S. Kaliskiego St., Warsaw 00-908, Poland

The effect of closed loop control on diagnostic indices in different faults of squirrel cage induction motor

Nourelhouda Bouabid Mohamed-Amine Moussa Yassine Maouche Abdelmalek Khezzar
Archives of Electrical Engineering | 2021 | vol. 70 | No 4 | 943-958 | DOI: 10.24425/aee.2021.138271
Keywords closed loop control discrete Fourier transformation fault diagnostic indirectfiled control rotor mechanical faults squirrel cage induction motor
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Abstract

The aim of this work is to study the influence of closed loop control on diagnostic indices of both broken bar and mixed air-gap eccentricity fault indices of the squirrel cage induction motor drive. The present work is focused on the direct stator current isd signal analysis, which is independent of torque load when the induction motor is controlled by an indirect control field. The fault signatures are on the line extracted from the direct stator current signal using the discrete Fourier transformation (DFT). The formula of the measured direct stator current at both conditions is determined by the transfer function of the current loop. The obtained results show that the current loop corresponds to a low pass filter and can reduce the magnitude of diagnostic indicators which lead to wrong evaluation of the fault. Simulation and experiments were carried out in order to confirm the theoretical analysis.
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Authors and Affiliations

Nourelhouda Bouabid
1
ORCID: ORCID
Mohamed-Amine Moussa
1
Yassine Maouche
1
Abdelmalek Khezzar
1
  1. Departement d’electrotechnique, Laboratoire d’electrotechnique de Constantine, Universite Constantine 1, 25000 Constantine, Algeria

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