Temat: hydrostatic transmission

Skocz do pozycji: 1.

Tytuł:: The control system for a manipulator with two degrees of freedom for water hydrostatic transmission drive
Autorzy:: Kucybała, P.
Sobczyk, A.
Tematy:: fluid power control system
hydrostatic transmission system
water hydraulics; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/248151.pdf Link otwiera się w nowym oknie
Opis:: The article presents concepts of control of the manipulator with two degrees of freedom, which uses a water hydraulic power unit to drive the actuators. The proposed control system is based on the use of electromagnetically controlled “rosettes valve” and proportional flow control valve. The control system is implemented using a computer equipped with a module for the real-time operating system (XPC Target) working in connection with the environment Matlab/Simulink. Controlled variable of the drive system is the displacement of the individual hydraulic cylinder and after determining manipulator kinematics, any point of the object in operating space. The positioning error of individual manipulator elements will be determined during the test in terms of different control algorithms, using the PID controller and PWM signal. In addition, it analyses the impact of changes in the velocity of the piston rod for the boom mechanism and the arm mechanism. An important aspect of the presented hydrostatic drive system is the use of water as a medium that physical and chemical properties are different from commonly used hydraulic oil, and which is friendly to the environment and meet the high cleanliness requirements for the fluid used to transfer the hydrostatic energy. Therefore, the control system requires a different approach, tied with synchronous control valves ON/OFF and proportional control flow regulators to achieve high accuracy.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 2.

Tytuł:: The use of digital hydraulic to the position control of hydraulic cylinder
Autorzy:: Kucybała, P.
Sobczyk, A.
Tematy:: fluid power control system
hydrostatic transmission system
digital hydraulics; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/244161.pdf Link otwiera się w nowym oknie
Opis:: The article presents the method of controlling the position of the hydraulic cylinder using hydraulic valves on/off with an appropriate strategy for digital control. Main elements of the hydraulic system under consideration include a group of electromagnetic hydraulic valves and hydraulic cylinder single acting. The control system was implemented in the environment of the real-time system based on MATLAB/Simulink. The digital control strategy is based on a fast enough on and off switching valves causing corresponding motion of the cylinder to the required position. This article presents the advantages and disadvantages of this type of control about the system with the proportional control system. The accuracy of this kind of control depends on the structure, properties of the valves or their static and dynamic characteristics. The results of analysis of the control system have the possibility of controlling the positioning hydraulic cylinder with a rather high accuracy, which can be used in place of proportional control systems. The use of digital control system allows, under certain conditions to obtain cost savings related to a reduction in energy consumption, to get a much better adaptation to variable control systems. This concept is an interesting alternative for the conventional control system and provides opportunities for application in systems, where conventional control is very expensive e.g. water hydraulics or to the clear systems where the use of hydraulic proportional technique is not necessarily, but depends on the user to the possibility of obtaining good quality control at a relatively low cost.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The wireless hydrostatic transmission control by the use of mobile technology
Autorzy:: Kucybała, P.
Pobędza, J.
Sobczyk, A.
Tematy:: fluid power control system
hydrostatic transmission system
wireless control system; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/248044.pdf Link otwiera się w nowym oknie
Opis:: The paper presents the concept of a new approach for remote control and monitoring of parameters of mobile or stationary machines in real time on the example of the hydrostatic transmission drive test stand. The proposed system control and monitoring is the mobile system which is closely related with the three applications written in a different programming languages, such as: java (Android) – mobile application runs on the tablet, C language – server application joins xPC Target with tablet, PHP – admin panel to manage mobile control platform. Controlling of the hydrostatic drive stand is implemented using an application installed on the tablet. This application is connected with computer’s real-time (xPC Target) module, generated in Matlab. The computer with xPC Target is equipped with a measuring-control card, to which the control signals are transmitted. This hardware-software component plays the connecting role between machine and operator of the mobile platform installed on the tablet. The application allows observe important parameters such as pressure, volumetric flow rate, temperature, velocity, torque in real-time, as well as, it enable, by use of special graphic slider on the tablet’s screen, to set control parameters such as: speed of electric motor, the opening and switching positions of the directional valve, as well as, setting the load by pressure relief valve. Based on this system research related to the verification of system operation were performed for different setting of the hydrostatic transmission drive speed controller, and selected results are presented in the paper.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Badania mechanizmu jazdy transportera gąsienicowego TUR 600
Investigation of mechanism of drive crawler transporter TUR 600
Autorzy:: Domagała, Z.
Szepietowski, S. W.
Tematy:: przekładnia hydrostatyczna
napęd hydrostatyczny
gąsienica
transporter
modelowanie
symulacja
hydrostatic transmission
hydrostatic drive
crawler
modelling
simulation; Pokaż więcej
Wydawca:: Poltegor-Instytut Instytut Górnictwa Odkrywkowego
Powiązania:: https://bibliotekanauki.pl/articles/169688.pdf Link otwiera się w nowym oknie
Opis:: W publikacji przedstawiono utworzony model symulacyjny hydraulicznego układu napędu mechanizmu jazdy transportera. Opisano badania mechanizmu jazdy transportera, przeprowadzone na rzeczywistym obiekcie w warunkach eksploatacyjnych, w oparciu o które dokonano identyfikacji modelu. Następnie omówiono wyniki badań symulacyjnych, przeprowadzonych w środowisku MatLab Simulink, hydraulicznego układu napędu gąsienic transportera.
The created simulating model of hydraulic arrangement of drive crawler mechanism drive transporter in publication was moved. It describe the investigation of mechanism of drive transporter, conducted on real object in exploational conditions, in the support about which the identification of model was executed was. It the results of simulating investigations were have talked over was then, the conducted in environment MatLab Simulink, hydraulic arrangement of the crawler’ drive transporter.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 5.

Tytuł:: Utility vehicle with hydraulic transmission and hybrid energy source
Autorzy:: Rădoi, Radu – Iulian
Dumitrescu, Cătălin
David, Ion
Blejan, Marian
Sefu, Stefan
Ionescu, Cristian
Tematy:: utility vehicle
hybrid
electric drive
diesel
hydrostatic transmission
maszyny górnicze
energia
elektryczność; Pokaż więcej
Wydawca:: Instytut Techniki Górniczej KOMAG
Powiązania:: https://bibliotekanauki.pl/articles/27324387.pdf Link otwiera się w nowym oknie
Opis:: Considering the EU's commitment to achieve climate neutrality by 2050, new tools and investments are needed to achieve this goal. Starting from this goal, the decision was made to develop a hybrid utility vehicle with a multifunctional role, which can also be used in closed spaces such as tunnels or underground parking lots or outside, contributing to the goal of zero carbon emsions. This machine will be the basis for the further development of an electric plug-in machine with increased autonomy. The machine will use a hybrid drive with a diesel engine and an electric motor coupled to a hydrostatic transmission in a closed circuit. The machine can work in heavy environments with a lot of dust, moisture or rugged terrain where the electric motors mounted in the wheel of the vehicle do not give very good results. The traction is done on all four wheels of the machine using wheel hydraulic motors with radial pistons. This type of engine ensures a high torque at low speeds, necessary for the types of work performed. The article presents the structure of this machine, the hydraulic scheme of the actuation, the configuration of the energy group powered by a LiFePO4 battery, through an inverter and the control system of the machine.
Dostawca treści:: Biblioteka Nauki

Artykuł

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Skocz do pozycji: 6.

Tytuł:: The accuracy of defining the energy efficiency of drive systems exemplified by comparison with hydrostatic drives with proportional motor speed control
Autorzy:: Skorek, Grzegorz
Tematy:: energy efficiency
useful power
power of losses
accuracy
field of work
drive system
hydrostatic transmission; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/135559.pdf Link otwiera się w nowym oknie
Opis:: The aim of the article is to look at the possibility of accurately determining the energy efficiency of drive systems. The results of experimentally determined efficiencies and the efficiencies determined from simulations of two hydrostatic systems with throttling control and fed by a constant capacity pump were compared. The research apparatus was very precisely designed, made and automated. The measuring instruments that were used are characterized by their high measuring accuracy. The issues related to the determination of the energy losses and the energy efficiency of the hydraulic motor or drive system, which should be determined as dependent on the physical quantities independent of these losses, were also discussed. A Paszota diagram of the power increase in the direction opposite to the direction of the power flow, replacing the Sankey diagram of the power decrease in the direction of the power flow in the hydraulic motor or in the drive system, was analyzed. The results showed that a Paszota diagram opens up a new perspective on research on the power of energy losses and energy efficiency of hydraulic motors and drive systems.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: A Study on Modeling and Experiment of a Wave Energy Converter Using Mechanical Coupled with Hydraulic Power Take-Off
Autorzy:: Cong, Binh Phan
Quang, Tri Truong
Le Dang, Hai Nguyen
Nguyen, Long Nhut-Phi
Tematy:: power take-off
mechanical coupling
hydraulic power take-off
hydrostatic transmission
wave energy converter
modeling; Pokaż więcej
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Powiązania:: https://bibliotekanauki.pl/articles/59114074.pdf Link otwiera się w nowym oknie
Opis:: The article’s proposal refers to a new concept of wave energy converter (WEC), in which the power take-off (PTO) is combined with the mechanical and hydrostatic transmission. Here, the wave energy is absorbed by turning the two-way movement of an incident wave into the one-way rotation of a hydraulic pump which drives a high-pressure (HP) hydraulic circuit. Electricity is generated using a rotating generator which is driven by an HP hydraulic circuit. First, the coupled PTO mechanism is presented to describe the working principle of the proposed WEC. Next, a mathematical model of the buoy connects generator system is shown to analyze the equipment’s performance subjected regular waves. And then, by using the theory of linear potential wave, the hydrodynamic forces acting on the semi-submerged floating buoy and an analytical model of the mechanical transmission coupled with the hydraulic transmission are modeled to investigate the motion of the rotary generator. An experimental Setup is performed to verify the analytical model. Based on the validated model, a structural optimization is calculated to bring the system to resonance condition. Then, a dry test is implemented to analyze the system’s performance. Some optimum parameters are determined and applied to the analytical model, which sends the signal to drive the actuator. As a result, the absorbed efficiency is increased significantly.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Dokładność określania sprawności energetycznej układów napędowych na przykładzie porównania napędów hydrostatycznych ze sterowaniem proporcjonalnym prędkości silnika
Autorzy:: Skorek, Grzegorz
Tematy:: efektywność energetyczna
dokładność
układ napędowy
przekładnia hydrostatyczna
energy efficiency
accuracy
field of work
drive system
hydrostatic transmission; Pokaż więcej
Wydawca:: Wydawnictwo Druk-Art
Powiązania:: https://bibliotekanauki.pl/articles/303264.pdf Link otwiera się w nowym oknie
Opis:: Celem artykułu jest spojrzenie na możliwość dokładnego określania sprawności energetycznej układów napędowych. Porównano wyniki eksperymentalnie określonych sprawności i symulacyjnie określonych sprawności dwóch układów hydrostatycznych ze sterowaniem dławieniowym, które zasilane są pompą o stałej wydajności. Stanowisko badawcze zostało bardzo starannie zaprojektowane, wykonane i zautomatyzowane. Zastosowane przyrządy pomiarowe cechowała wysoka dokładność pomiarów. Poruszono także tematykę związaną z określaniem strat energetycznych i sprawności energetycznej silnika lub układu napędowego, które powinny być określane jako zależne od wielkości fizycznych niezależnych od tych strat. Przeanalizowano wykres Paszoty wzrostu mocy w kierunku przeciwnym do kierunku przepływu mocy, zastępujący wykres Sankeya spadku mocy zgodnego z kierunkiem przepływu mocy w silniku lub w układzie napędowym. Wykres Paszoty otwiera nową perspektywę badań mocy strat energetycznych i sprawności energetycznej silników i układów napędowych.
The aim of the article is to look at the possibility of accurately determining the energy efficiency of drive systems. The results of experimentally determined efficiencies and simulationally determined efficiencies of two hydrostatic systems with throttling control, which are fed with a constant capacity pump, were compared. The research stand was very precise designed, made and automated. The applied measuring instruments were characterized by high accuracy of measurements. The issues related to the determination of energy losses and energy efficiency of the hydraulic motor or drive system, which should be determined as dependent on the physical quantities independent of these losses, were also discussed. A Paszota diagram of the power increase in the direction opposite to the direction of the power flow, replacing the Sankey diagram of the power decrease in the direction of the power flow in the hydraulic motor or in the drive system was analyzed. Paszota diagram opens a new perspective on the research of the power of energy losses and energy efficiency of hydraulic motors and drive systems.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: Stanowisko do wyznaczania charakterystyk statycznych i dynamicznych zaworów proporcjonalnych
Test stand for estimation of static and dynamic characteristic of proportional hydraulic valves
Autorzy:: Kudźma, Z.
Stosiak, M.
Herok, S.
Tematy:: rozdzielacz proporcjonalny
sterowanie proporcjonalne
charakterystyki
przekładnia hydrostatyczna
badania
proportional directional control valve
proportional control
characteristics
hydrostatic transmission
research; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Powiązania:: https://bibliotekanauki.pl/articles/276099.pdf Link otwiera się w nowym oknie
Opis:: W artykule przedstawiono stanowisko do wyznaczania charakterystyk statycznych i dynamicznych zaworów sterowanych w technice proporcjonalnej. Opisano układ sterujący rozdzielaczem proporcjonalnym i wielokanałowy tor sterująco-pomiarowy ze specjalistycznym oprogramowaniem umożliwiającym generowanie dowolnego w czasie przebiegu sygnału sterującego oraz na akwizycję danych pomiarowych. Przedstawiono przykładowe wyniki wyznaczania charakterystyk proporcjonalnego rozdzielacza regulacyjnego najnowszej generacji. Zamieszczono przykład zastosowania uzyskanych wyników pomiarowych do uściślenia modelu matematycznego sterowania rozruchem przekładni hydrostatycznej pod kątem minimalizacji hałasu.
In the paper a test stand for determination of static and dynamic proportional valves characteristic was presented. A multichannel test stand was developed and presented in the paper. Moreover control system of proportional directional control valve and multichannel slotted line with special software for generation several control signals were presented too. Moreover some experimental tests results were presented for high-response proportional directional control valve. An example of application obtained results for mathematical model refinement of control of hydrostatic transmission start with minimum noise criterion was presented.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Conceptual approach to select parameters of hydrostatic and mechanical transmissions for wheel tractors designed for agricultural operations
Autorzy:: Taran, I.
Bondarenko, A.
Tematy:: hydrostatic transmission
mechanical transmission
wheel tractor
braking process
controllability
braking efficiency
przekładnia hydrostatyczna
przekładnia mechaniczna
ciągnik kołowy
proces hamowania
sterowność
skuteczność hamowania; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/224031.pdf Link otwiera się w nowym oknie
Opis:: As a result of theoretical and experimental efforts, innovative scientifically grounded conceptual approach to select hydrostatic and mechanical transmissions (HMT) for wheel tractors designed for agricultural operations has been proposed. The approach is characterized by focusing on kinematic parameters, power parameters, and energy parameters of the transmission while performing technological operation “plowing”; it also takes into consideration braking features of a tractor in the context of various braking types. Application of the approach offers an opportunity to improve technical level of transmissions while updating current wheel tractors and designing new ones; moreover, that will better controllability as well as braking efficiency. The conceptual approach developed on the basis of proposed techniques and applied mathematical models makes possible to determine rational structure and basic design parameters of two-flow HMTs while designing; it also helps formulate recommendations concerning a technique for service braking and emergency braking under specific operational conditions.
Dostawca treści:: Biblioteka Nauki

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