Temat: drive force - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experimental investigations of elimination the stick-slip phenomenon in the presence of longitudinal tangential vibration
Autorzy:: Leus, Mariusz
Abrahamowicz, Marta
Powiązania:: https://bibliotekanauki.pl/articles/386857.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: stick-slip phenomenon
drive force
longitudinal tangential vibrations
Opis:: The article presents a scheme and description of the test stand as well as selected experimental results of the influence of longitudinal tangential vibrations on the stick-slip phenomenon. The tests were carried out at a constant forced vibration frequency f = 2000 Hz, as a function of the amplitude of the vibration velocity va. The position of the sliding body and the drive force necessary to make the body slip and maintain this motion were measured. The measurements were made in two successive stages. In the first stage, when the substrate on which the sliding occurred was stationary. In the second one, the substrate is in a vibrating motion in the direction parallel to the slip. The conducted experimental analyses have shown that longitudinal tangential vibrations can contribute to the reduction or even complete elimination of the stick-slip phenomenon.
Źródło:: Acta Mechanica et Automatica; 2019, 13, 1; 45-50
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Testing of force sensors for the active measurement and limitation of axial loads in heavy turning
Autorzy:: Kasprzak, Marcin
Pyzalski, Michal
Powiązania:: https://bibliotekanauki.pl/articles/2052200.pdf
Data publikacji:: 2021
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: feed drive load
heavy turning
force sensor
Opis:: This article describes the design and construction of a feed drive load measuring system based on industrial strain gauges installed in the machine tool structure. The system was calibrated and dynamically tested in the range of 15 kN in real machining conditions. The tests showed that the system installed on a machine tool works correctly and its error amounts to about 5% of the measured range. Thanks to this measuring system the accuracy of the machine tool in machining conditions can be increased through the active compensation of the axial error caused by displacements. Moreover, the system can prevent tool breakage and increase machining efficiency.
Źródło:: Journal of Machine Engineering; 2021, 21, 4; 106-117
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Method for estimating the static friction degree in the slide pair of the miniaturised electrohydraulic servomechanism
Autorzy:: Ułanowicz, L.
Żyluk, A.
Powiązania:: https://bibliotekanauki.pl/articles/245112.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: operation
hydraulic drive
electrohydraulic servomechanism
pressure
friction force
Opis:: One of the most important parameters specifying the usability of the miniaturised electrohydraulic servomechanism includes a static friction degree in its slide pairs, i.e. resistance of the slider’s movement from rest after some time of its staying at rest under pressure. Therefore, at the stage of designing and construction of the electrohydraulic servomechanism, it is important to determine the greatest static friction degree, which may arise in the slider hydraulic pair of this device during its operation. The objective of this article is to present a method for estimating the maximum static friction values in the slide pair based on the extreme value theory. The operation and loading conditions of the slide pair of the electrohydraulic servomechanism for the unmanned aircraft control system were described. The procedure for estimating the maximum static friction degree in the slide pair with the use of the extreme and probabilistic grid was presented. The extreme and probabilistic grid structure was based on the Gumbel probability graph. The graphic presentation of results of the static friction experimental studies in the slide pair on the extreme and probabilistic grid was discussed. By using the graphics method, the empirical dependence of the static friction force in the slide pair on the working fluid pressure in the hydraulic drive (loading conditions) was determined. A practical example of estimating the maximum values of the static friction force that may occur in the slider hydraulic pair of the miniaturized electrohydraulic servomechanism is shown.
Źródło:: Journal of KONES; 2018, 25, 2; 399-407
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Anvilless hydraulic hammer with double-sided drive and increased lower ram mass
Besshabotnyjj gidravlicheskijj molot s dvustoronnim privodom i uvelichennojj massojj nizhnejj baby
Autorzy:: Rey, A.
Gutko, Y.
Powiązania:: https://bibliotekanauki.pl/articles/792057.pdf
Data publikacji:: 2013
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: hydraulic hammer
double-sided drive
pressure
force
speed
acceleration
equation
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 3
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Simulation Testing of the Machine Tool Equipped With the Active Feed Drive
Autorzy:: Sveda, J.
Valasek, M.
Sika, Z.
Powiązania:: https://bibliotekanauki.pl/articles/971162.pdf
Data publikacji:: 2009
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
feed drive
control loop simulation
cutting force
vibration suppression
Opis:: The vibration of a machine tool is mainly caused by the dynamic acceleration of a motion axis and by the forces that act on it. All the disturbance forces are transmitted to the machine tool frame through the drive (motor) and its regulation loop and they excite its vibrations. Thus the achievable dynamics and machining quality is negatively influenced. There are several possibilities how to suppress the excited vibrations including the recently introduced "motor on motor" technique which is based on the serial connection of two linear motors. This paper presents new simulation results performed on the simulation model of a real machine tool. The maximal achievable tuning of the regulation loop parameters of the motion axis equipped with the "motor on motor" technique was confronted with the conventional feed drive setting. The "motor on motor" feed drive properties were also tested in the virtual machining operation mode where the real measured cutting force was used. The sensitivity analysis of the reaction force and the middle mass movement of the "motor on motor" feed drive solution to the predicted cutting force introduced to the feed drive control has been investigated. The middle mass is represented by the shared part of both linear motors which absorbs the high frequency part of the reaction force by its movement.
Źródło:: Journal of Machine Engineering; 2009, 9, 2; 81-92
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Friction losses in a linear hydraulic motor as a result of the influence of the control structure and oil viscosity
Autorzy:: Skorek, G.
Powiązania:: https://bibliotekanauki.pl/articles/241950.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: friction force
mechanical losses
energy efficiency
oil viscosity
hydrostatic drive
hydraulic cylinder
Opis:: The problem of energy tests of hydraulic systems with hydraulic cylinders, seemingly simple displacement machines, is more complex than that of rotary hydraulic systems. The results of the researches provide an insight into the impact of external loads, required speed, structure of the power supply system, viscosity of hydraulic oil on friction loss, and the efficiency of cylinder drive. The hydraulic cylinder is the strongest structure in the system. Failure of the system is most likely due to failure of the pump supplying the cylinder. The high load of the pump is often caused by the very low energy efficiency of the cylinder, which, despite a relatively low external load, requires high inlet pressure due to large mechanical losses of friction between the piston and the cylinder and between the piston rod and gland. These losses depend on the type of seal used, its shape, the material it is made from, pre-clamp, and the operating parameters of the cylinder. Improperly sealed or assembled seals can cause energy losses of up to 25%. Due to the use of moving seals in the hydraulic cylinder, its energy behaviour is completely different compared to the energy behaviour of a rotary motor, which does not have any seals. The friction force connected with the work of the sealing joints and the mechanical efficiency of the cylinder are determined not only by the external load but also by the method of the applicable supply of the cylinder resulting from the throttling structure, and in particular the pressure level generated in the discharge chamber of the cylinder.
Źródło:: Journal of KONES; 2018, 25, 4; 377-384
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Design of brake force distribution model for front-and-rear-motor-drive electric vehicle based on radial basis function
Autorzy:: Sun, B.
Zhang, T.
Gao, S.
Ge, W.
Li, B.
Powiązania:: https://bibliotekanauki.pl/articles/224023.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: electric vehicle
motor drive
front-and-rear-motor-drive
brakes force
brake force distribution
pojazd elektryczny
napęd silnikowy
napęd silnikowy przedni i tylny
siła hamowania
rozkład siły hamowania
Opis:: To achieve high-efficiency and stable brake of a front-and-rear-motor-drive electric vehicle (FRMDEV) with parallel cooperative braking system, a multi-objective optimal model for brake force distribution is created based on radial basis function (RBF). First of all, the key factors, which are the coefficient of brake force distribution between the front and rear shafts, the coefficient of brake force distribution at wheels, the coefficient of regenerative brake force distribution between front and rear axles, that influence the brake stability and energy recovery of the FRMDEV are analyzed, the fitness functions of brake stability and energy recovery are established. Secondly, the maximum allowed regenerative brake torque influenced by the state of charge of battery is confirmed, the correction model of the optimal distribution coefficient of regenerative brake force is created according to motor temperatures. Thirdly, based on HALTON sequence method, a two-factor database, vehicle velocity and brake strength, that characterizes vehicle operation is designed. Then an off-line response database of the optimal brake force distribution is established with the use of particle swarm optimization (PSO). Furthermore, based on hybrid RBF, the function model of the factor database and the response database is established, and the accuracy of the model is analyzed. Specially, the correlation coefficient is 0.995 and the predictive error variance is within the range between 0.000155 and 0.00018. The both indicate that the multi-objective distribution model has high accuracy. Finally, a hardware-in-loop test platform is designed to verify the multi-objective optimal brake force distribution model. Test results show that the real-time performance of the model can meet the demand of engineering application. Meanwhile, it can achieve both the brake stability and energy recovery. In comparison with the original brake force distribution model based on the rule algorithm, the optimized one proposed in this paper is able to improve the energy, recovered into battery, by 14.75%.
Źródło:: Archives of Transport; 2018, 48, 4; 87-98
0866-9546
2300-8830
Pojawia się w:: Archives of Transport
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Dynamics of electromechanical drive of suspended timbertransporting rope system
Autorzy:: Dzyuba, L.
Baryliak, V.
Powiązania:: https://bibliotekanauki.pl/articles/297819.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: suspended
timbertransporting rope system
rope system drive
dynamic model
dynamic force
torsional stiffness
Opis:: Dynamic loads of drive of suspended timbertransporting rope system with an electric motor are investigated. Developed a dynamic model of the electromechanical drive considering the changing of the electric motor’s moment during start-up and the resistance force moment. The changing of the resistance force moment is expressed through the changes in tension force of the pull-bearing rope systems in various manufacturing operations. In determining the moment of inertia of the drive drum is accounted multi-winding of rope. Research on dynamic load of system elements are made with the taking into account the influence of torsional stiffness of system parts and lifting capacity of the suspended timbertransporting rope system.
Źródło:: Technical Sciences / University of Warmia and Mazury in Olsztyn; 2016, 19(3); 245-256
1505-4675
2083-4527
Pojawia się w:: Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Evaluation of changes in traction properties of a drive wheel on the sod utilized by various means
Ocena zmian właściwości trakcyjnych koła napędowego na darni o różnym sposobie użytkowania
Autorzy:: Czarnecki, J.
Białczyk, W.
Brennensthul, M.
Cudzik, A.
Powiązania:: https://bibliotekanauki.pl/articles/93401.pdf
Data publikacji:: 2015
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: drive tyre
traction force
traction efficiency
slip
opona napędowa
siła trakcyjna
sprawność trakcyjna
poślizg
Opis:: The paper presents research results, the objective of which was to assess the traction properties of a wheel equipped with a drive tyre on sod with a varied species composition of plants and various usage level. Based on the measurements carried out with the use of a unique stand for traction research, the slip, traction force and efficiency were determined. It was proved that the species composition of sod and usage level resulted in varied values of the analysed parameters. Higher values of the traction force were obtained on sod I at the usage level of 50 and 100%. Maximum values of the traction efficiency on both sods, regardless the usage level, occurred at the wheel slip lower than 20%. In order to describe the condition of facilities, where traction research was carried out, moisture, compaction and maximum shearing stresses were measured.
W pracy przedstawiono wyniki badań, których celem była ocena zmian właściwości trakcyjnych koła wyposażonego w oponę napędową na darni różniącej się składem gatunkowym roślin oraz poziomem użytkowania. Na podstawie pomiarów wykonanych przy użyciu unikatowego stanowiska do badań trakcyjnych wyznaczono poślizg oraz siłę trakcyjną i sprawność. Wykazano, że skład gatunkowy darni oraz poziom jej użytkowania skutkowały zróżnicowaniem wartości analizowanych parametrów. Wyższe wartości siły trakcyjnej uzyskano na darni I, przy użytkowaniu na poziomie 50 i 100%. Maksymalne wartości sprawności trakcyjnej na obu darniach, niezależnie od poziomu użytkowania występowały przy poślizgu koła mniejszym niż 20%.W celu scharakteryzowania stanu obiektów, na których prowadzono badania trakcyjne wykonano pomiary wilgotności i zwięzłości oraz maksymalnych naprężeń ścinających.
Źródło:: Agricultural Engineering; 2015, 19, 4; 25-33
2083-1587
Pojawia się w:: Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "drive force" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język