Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "control efficiency" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-10 z 86
Tytuł:
Improving efficiency of pH control by balance-based adaptive control application
Autorzy:
Stebel, K.
Czeczot, J.
Metzger, M.
Powiązania:
https://bibliotekanauki.pl/articles/229312.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
process control
adaptive control
pH process
control efficiency
controller tuning
Opis:
This paper deals with the efficient control of the pH process. Considering the PI + gain scheduling (PI+GS) controller as the benchmark and its control performance as the base, we investigate experimentally the overall improvement in the control performance obtained by the application of the Balance-Based Adaptive Controller (B-BAC), which requires only the measurement data of the flow rates and pH values. The improvement of the control efficiency is investigated not only in terms of the controlled variable performance but also in terms of the manipulated variable performance considered as the considerable control cost. The application of the B-BAController can ensure lower controlled pH variability at the price of the control effort similar to the PI+GS approach and thus it can improve the overall efficiency of pH control. The second important contribution is the experimental validation of the very simple and intuitive tuning procedure for the B-BAController.
Źródło:
Archives of Control Sciences; 2013, 23, 1; 19-40
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of fuel injection control system in a GDI engine
Autorzy:
Wołczyński, Z.
Powiązania:
https://bibliotekanauki.pl/articles/246237.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
gasoline engine
mixture composition
injector characteristic
control of volumetric efficiency
Opis:
In 1995 as a first in the world Mitsubishi introduced SI engine with the direct fuel injection to combustion chamber GDI (Gasoline Direct Injection). Currently such a way of providing of gasoline is applied and introduced to mass production by other companies. This solution permits to burn stratified mixtures which is rich in the region of the spark plug and very lean in more distant areas of the combustion chamber. The average mixture composition of such a mixture is very poor and often incombustible. The combustion of lean mixture to some extend permits to reduce fuel consumption but limits also the possibility of reduction of NOx by the typical catalyst. Furthermore the direct injection of gasoline to combustion chamber gives the possibility of the precise dosage in each cycle. The precise control of mixture composition is possible because the injection of the fuel takes place after closure of inlet valve, so the amount of the air in the cylinder is known. The precise dosage and the dispersion of the fuel in connected with several problems. The additional information which is provided by sensors installed on the engine is very useful to solve. Gasoline direct injection fuel systems are equipped with sensors which aren't use in standard indirect systems. These problems are described in the paper with special attention paid on the accuracy of the dosage of the fuel and all problems related with this.
Źródło:
Journal of KONES; 2010, 17, 4; 599-606
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ISEE - Intelligent System of Energy Efficiency
Autorzy:
Ziąbka, Tomasz
Grzebielec, Andrzej
Rusowicz, Artur
Powiązania:
https://bibliotekanauki.pl/articles/132041.pdf
Data publikacji:
2020
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
energy efficiency
control system
Opis:
Increasing energy efficiency is one of the priorities of the European 3x20 climate and enery package. The ISEE system - Intelligent Energy Efficiency Control is a response to the growing interest in energy saving. It is also closely related to energy efficiency and reduction of greenhouse gas emissions. The presented system also allows connecting renewable energy sources to the analyzed facilities. It is intended for a wide range of recipients.
Źródło:
Modern Engineering; 2020, 1; 6-10
2450-5501
Pojawia się w:
Modern Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Linear matrix inequalities control driven for non-ideal power source energy harvesting
Autorzy:
Ferreira, D. C.
Chavarette, F. R.
Peruzzi, N. J.
Powiązania:
https://bibliotekanauki.pl/articles/281518.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
energy harvesting
efficiency
control
non-ideal excitation
Opis:
The dynamic model of a linear energy harvester excited by a non-ideal power source is coupled to a controller to maximum vibration adjustment. Numerical analysis is taken to evaluate the energy harvested keeping the vibration optimized for the maximum interaction to the energy source using linear matrix inequalities for control driven. The dimensionless power output, actuation power and net output power is determined. As a result, it is possible to verify that the total energy harvested via exogenous vibration using the proposed controller is increased up to 65 times when in comparison to the open loop system.
Źródło:
Journal of Theoretical and Applied Mechanics; 2015, 53, 3; 605-616
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy Consumption of Water Pumping for Selected Control Systems
Autorzy:
Szychta, L.
Powiązania:
https://bibliotekanauki.pl/articles/262584.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Tematy:
efficiency
energy consumption
control system
water pump
Opis:
The article defines the coefficient of the unit energy consumption of water pumping in pump group. Correct pump operation in pump group are described during cascade control, at variable rotational speeds and in the highest range of efficiency. A method of determining the unit energy consumption of water pumping for these control systems are defined at any daily demand and known pump H(Q) and efficiency curves are plotted at nominal rotational speed.
Źródło:
Electrical Power Quality and Utilisation. Journal; 2006, 12, 1; 21-27
1896-4672
Pojawia się w:
Electrical Power Quality and Utilisation. Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cooling water flow influence on power plant unit performance for various condenser configurations setup
Autorzy:
Dobkiewicz-Wieczorek, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/2091367.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cooling water
power plant efficiency
cooling water flow control
CHP plant
efficiency
Opis:
This paper presents the influence of cooling water regulation on power plant net efficiency. It was examined whether, for the non-nominal low-pressure turbine load, it is justified to reduce the cooling water pump load, and how it would affect the unit net efficiency. Calculations for two types of power units were carried out: with condensing and extraction-condensing turbine. The tested condensing power plant consists of three surface condensers. The calculation included four condensers’ connections set up on the cooling water side to check how the cooling water system pressure drop affects the net unit performance. The result has confirmed that implementing serial connection decreases net efficiency when cooling water flow regulation is used, but the mixed connection should be applied when pump load is not controlled. It was proved that the cooling water flow control gives a profit for both units. Net efficiency for combined heat and power plant can be improved by 0.1–0.5 pp, the gain is remarkable below 60% of the low-pressure turbine part load. Flow control implementation in the unit with condensing turbine water control gives a similar profit just below 80% of the turbine load. Next, an influence of the additional limitations of a cooling water system (minimal total pump head, cooling tower) affecting the feasibility of implementing the water control has been considered. Applying a multi-cell forced draft cooling tower does not have a significant impact on results, but when a natural draft cooling tower is used, the flow control range is strongly reduced.
Źródło:
Archives of Thermodynamics; 2022, 43, 1; 141--167
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Generalized α-V-univex functions for multiobjective variational control problems
Autorzy:
Sharma, S.
Choudhury, S.
Jayswal, A.
Powiązania:
https://bibliotekanauki.pl/articles/206848.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
control problem
α-V-univexity
efficiency
sufficiency
duality
Opis:
The purpose of this paper is to introduce a new class of _-V-univex/ generalized _-V-univex functions for a class of multiobjective variational control problems. Moreover, sufficient optimality conditions and Mond-Weir type duality results, associated with the multiobjective variational control problem, are established under aforesaid assumptions.
Źródło:
Control and Cybernetics; 2014, 43, 3; 403-420
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of losses and energy efficiency of hydrostatic drives with hydraulic cylinder
Autorzy:
Skorek, G.
Powiązania:
https://bibliotekanauki.pl/articles/260205.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
energy losses
energy efficiency
hydrostatic system
control structures
proportional directional control valve
cylinder
Opis:
Energy efficiency of hydrostatic transmissions, and especially efficiencies of drives with motor speed controlled by throttle, as well as efficiency of hydraulic servomechanisms can in fact be higher than the efficiency values most frequently given by the respective literature in this field. With the progress achieved in recent years in the development of hydraulic systems it is becoming necessary to develop methods for precise energy efficiency calculation of such systems. It is difficult to imagine that more and more, better and better machines and control elements could be used without the possibility of a mathematical tool at our disposal to enable an accurate analysis and assessment of behavior of the system in which such machines and control elements have been applied. The paper discusses energy savings using mathematical model of losses in elements, the energy efficiency of the system. There are possibilities to reduce energy losses in proportional control systems (in the pump, in the throttle control unit, especially in the cylinder), and thus to improve the energy efficiency of the throttling manifold. The considerations allow for comparison of the loss power resulting from the applied hydraulic control structure of the hydraulic cylinder and the power consumed by the pump from the electric motor that drives it, the power necessary to provide pump-driven hydraulic cylinder. The article shows the impact on the output (useful) power consumed in the considered systems, and the impact on the power consumed of the loss power in the individual elements. The paper presents also formulas of loss power, formulas of energy efficiency connected with investigated hydrostatic drives, two schematic diagrams of hydraulic systems, their principle of operation and problems of studying losses in elements and energy efficiency characteristics of systems consisting of a feed assembly, control set and cylinder. It also includes a subject matter connected with an energy loss power of hydrostatic systems with hydraulic cylinder controlled by proportional directional control valve. Diagrams of loss power of two hydraulic systems worked at the same parameters of speed and load of a cylinder, which were different due to structure and ability of energy saving, were presented and compared.
Źródło:
Polish Maritime Research; 2018, 4; 114-129
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation and experimental results of hybrid electric machine with a novel flux control strategy
Autorzy:
Paplicki, P.
Wardach, M.
Bonisławski, M.
Pałka, R.
Powiązania:
https://bibliotekanauki.pl/articles/140694.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PM machines
FEM analysis
experimental results
control strategy
field control capability
efficiency maps
Opis:
The paper presents selected simulation and experimental results of a hybrid ECPMS-machine (Electric Controlled Permanent Magnet Synchronous Machine). This permanent magnets (PMs) excited machine offers an extended magnetic field control capability which makes it suitable for battery electric vehicle (BEV) drives. Rotor, stator and the additional direct current control coil of the machine are analyzed in detail. The control system and strategy, the diagram of power supply system and an equivalent circuit model of the ECPMS-machine are presented. Influence of the additional excitation on the performance parameters of the machine, such as: torque, efficiency, speed limits and back-EMF have also been discussed.
Źródło:
Archives of Electrical Engineering; 2015, 64, 1; 37-51
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laboratory Tests of a Speed Control System for Roadheader Cutting Heads
Autorzy:
Joostberens, J.
Heyduk, A.
Powiązania:
https://bibliotekanauki.pl/articles/2064888.pdf
Data publikacji:
2018
Wydawca:
STE GROUP
Tematy:
speed control
roadheader
cutting optimization
PI controller
power efficiency
Opis:
The paper presents selected results of the laboratory tests of the speed control system for the R-130 roadheader with an inverter-fed cutting heads drive. The results recorded for the variable speed system have been compared with the measurement obtained for the network supplied drive. There have been noticed some oscillations after rapid current overloads. They are due to the operation of the internal current controller of the PWM-inverter, The oscillations are fast decaying - so they prove the results of initial system stability checking. Generally, the automatic speed control, tracking the optimum speed level calculating by supervisory speed adjuster makes possible to better utilize the motor power throughout the whole cutting time. The better operating conditions of the motor cause increase in the whole system power efficiency (even in spite of additional losses in the inverter circuit) Additionally the sped control reduces dynamical overloads. This fact can have a positive influence on the whole system reliability. The speed control subsystem is a part of the whole control system which contains also close-loop boom angular position and velocity control circuits.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 153--159
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 86

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies