Temat: motion kinematics - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Kinematic decomposition of a ship nondimensional trajectory in turning circle test
Analiza kinematyczna bezwymiarowej trajektorii statku podczas próby cyrkulacji
Autorzy:: Artyszuk, J.
Powiązania:: https://bibliotekanauki.pl/articles/359722.pdf
Data publikacji:: 2012
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:: manewrowanie statku
cyrkulacja
trajektoria
kąt dryfu
prędkość kątowa (bezwymiarowa)
kinematyka ruchu
ruch krzywoliniowy
ship manoeuvring
ship turning
trajectory
drift angle
yaw velocity (nondimensional)
motion kinematics
curvilinear motion
Opis:: The paper presents basic principles of a ship’s nondimensional trajectory definition (for arbitrary manoeuvres) by means of drift angle and nondimensional yaw velocity. This enables faster and better tuning of mathematical model of ship manoeuvring motions against the provided full scale sea maneouvring trials (usually in a form of position trajectories) – since it is known the governing, basic factors behind the trajectory. A special focus has been applied to the standard turning circle test.
W pracy dokonano nowatorskiego i kompleksowego ujęcia kinematyki ruchu krzywoliniowego, szczególnie w odniesieniu do bezwymiarowej (mierzonej jednostkami długości statku) trajektorii statku podczas manewru cyrkulacji. Sformułowano analitycznie kształt trajektorii oraz jej ewoluty (położenia środków krzywizny). Ponadto przedstawiono praktyczne znaczenie i możliwości kształtowania trajektorii poprzez dobór parametrów zmian kąta dryfu i bezwymiarowej prędkości kątowej. Pozwala to zredukować problem kształtu trajektorii do dwóch parametrów o bardzo ważnej interpretacji hydrodynamicznej, co ma olbrzymie znaczenie w procesie identyfikacji i/lub walidacji matematycznego modelu manewrowania statku.
Źródło:: Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 30 (102); 5-11
1733-8670
2392-0378
Pojawia się w:: Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: New concept of a rocker engine - kinematic analysis
Autorzy:: Szymkowiak, M.
Szwaja, S.
Powiązania:: https://bibliotekanauki.pl/articles/246829.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: rocker
engine
kinematics
piston motion
Opis:: The paper presents concept and design of a four-stroke 4-cylinder internal combustion engine consisted of a single connecting rod to a crankshaft and four additional rods joining pistons with a rocker. The rocker is a specific element in the engine construction that makes this engine different from the typical reciprocating internal combustion piston engine. Furthermore, kinematical analysis of this piston - rocker - crankshaft mechanism was conducted. As concluded from the analysis, this mechanism implemented to the engine, provides several advantages with respect to both dynamic and thermodynamic related issues. First of all, a profile of the piston motion can be easily changed with change in the mechanism geometry e.g. major dimensions of connecting rods, the rocker etc. Thus, the piston motion profile can be asymmetrical with slow motion to and relatively fast distancing from the TDC. This feature can be useful in reducing thermal losses to an engine cooling system. Additionally, the mechanism characterizes itself with low transverse force from the piston, which acts on a cylinder liner. As a result, it significantly reduces frictional losses and should increase the overall efficiency of the engine. Among disadvantages, higher inertial forces are the most important problem. As analyzed, the rocker is the main component that contributes to increase in inertial forces by approximately three to four times. On the other hand, total inertia forces, due to specific kinematical chain of the mechanism, can be remarkably reduced in case the mechanism is correctly optimized.
Źródło:: Journal of KONES; 2012, 19, 3; 443-449
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Analysis of Results of Empirical Investigations of Launcher–Missile System Using TEMA Motion Program Environment
Analiza wyników badań empirycznych układu wyrzutnia - pocisk rakietowy z wykorzystaniem środowiska programu TEMA Motion
Autorzy:: Dziopa, Z.
Nyckowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/403648.pdf
Data publikacji:: 2018
Wydawca:: Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:: mechanics
kinematics of motion
picture analysis
missile start recording
missile launcher
mechanika
kinematyka ruchu
analiza obrazu
rejestracja startu pocisku rakietowego
wyrzutnia rakiet
Opis:: The paper presents an analysis of the pictures, recorded from the testing ground investigations, obtained with application of the fast-digital camera Phantom v9.1. The analysis was focused on determination of the kinematics of motion of the launcher-missile system. TEMA Motion program was used for motion analysis of the investigated system. The courses of variability of kinematic values characterising motion of the selected points of the launcher were determined. The results analysis showed that the launcher undergoes the linear displacement (X, Y) and angular one (alpha) that cause significant differences in the flight trajectory of the successively launched missiles.
W pracy przedstawiono analizę zarejestrowanych obrazów z badań poligonowych przy użyciu szybkiej kamery cyfrowej Phantom v9.1. Celem analizy jest określenie kinematyki ruchu układu wyrzutnia – pocisk rakietowy. Do analizy ruchu badanego układu użyto programu TEMA Motion. Określono przebiegi zmienności wielkości kinematycznych charakteryzujących ruch wybranych punktów wyrzutni. Analiza wyników wykazała, że wyrzutnia ulega przemieszczeniu liniowemu (X, Y) oraz kątowemu, które prowadzą do istotnych różnic w trajektorii lotu wystrzeliwanych po sobie pocisków rakietowych.
Źródło:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa; 2018, 9, 2 (32); 85-98
2081-5891
Pojawia się w:: Problemy Mechatroniki : uzbrojenie, lotnictwo, inżynieria bezpieczeństwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Motion planning of wheeled mobile robots subject to slipping
Autorzy:: Zadarnowska, K.
Oleksy, A.
Powiązania:: https://bibliotekanauki.pl/articles/384800.pdf
Data publikacji:: 2011
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: dynamics
kinematics
motion planning
slipping effect
wheeled mobile robot
Opis:: Most dynamic models of wheeled mobile robots assume that the wheels undergo rolling without slipping, thus in general wheeled mobile robots are considered as nonholonomic systems. This paper deals with the problem of motion planning of mobile robots, whose nonholonomic constraints have been violated during the motion. The slipping phase is studied in details. A static model of interaction forces between wheels and ground is adopted by means of the singular perturbation approach [2]. A novel control theoretic framework for mobile robots subject to slipping is defined: both kinematics and dynamics of a mobile robot are modeled as a control system with outputs, the performance of a locally controllable system is nontrivial, the Jacobian of the mobile robot is defined in terms of the linear approximation to the system [36]. A novelty of the methodology consists in respecting of the analogy between the stationary and mobile robots and deriving performance characteristics from local controllability. In this paper we address the problem of motion planning by means of the Jacobian pseudo inverse algorithm. The effectiveness of the Jacobian pseudo inverse motion planning algorithm is demonstrated with reference to differential drive type robot (Pioneer 2DX) subject to slipping.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2011, 5, 3; 49-58
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: On the material and spatial description of rigid fields
O materialnym i przestrzennym opisie ciał sztywnych
Autorzy:: Rudnicki, M.
Powiązania:: https://bibliotekanauki.pl/articles/279312.pdf
Data publikacji:: 2005
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: kinematics
rigid body
material and spatial description
relative motion
Opis:: Rigid kinematics is re-examined applying the material, spatial and mixed description without use of any coordinate system. Some tensor representations for the displacement gradient, velocity gradient, and acceleration gradient are obtained. Special cases of rotation about fixed as well as nearly fixed axis are distinguished. Assumption of small rotation is also taken into account. Relative motion of a particle is briefly described.
Rozważono kinematykę ciała sztywnego w opisie materialnym, przestrzennym i mieszanym bez wprowadzania układu współrzędnych. Przedstawiono reprezentacje tensorowe gradientów pól przemieszczenia, prędkości i przyspieszenia. Wyodrębniono przypadki szczególne obrotu wokół stałej oraz prawie stałej osi. Zbadano ruch przy założeniu małego obrotu. Naszkicowano zagadnienie ruchu względnego cząstki.
Źródło:: Journal of Theoretical and Applied Mechanics; 2005, 43, 4; 825-840
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Path planning optimization and object placement through visual servoing technique for robotics application
Autorzy:: Patel, Sumitkumar
Israni, Dippal
Shah, Parth
Powiązania:: https://bibliotekanauki.pl/articles/950976.pdf
Data publikacji:: 2020
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: visual servoing
features
coordinates
kinematics
disparity
optimization
motion estimation
Opis:: Visual servoing define a new methodology for vision based control in robotics. Vision based action involve number of actions that move a robot in response of results of camera analysis. This process is important to operate and help robot to achieve a specific goal. The main purpose of visual servoing consists of considering a vision system by specific sensor dedicated to involve control servo loop and task. In this article, three visual control scheme: Image Based Visual Servoing (IBVS), Position Based Visual Servoing (PBVS) and Hybrid Based Visual Servoing (HBVS) are illustrated. The different terminologies are represented through effective workflow of robot vision. IBVS method concentrate on the image features that are immediately available in the image. This experiment is performed by estimating distance between camera and object. PBVS consist of moving object 3-D parameters to estimate measurement. This paper showcases PBVS using kuka robot model. HBVS uses the 2D and 3D servoing by combining visual sensors also it overcomes challenges of previous two methods. This paper represents HBVS method using IPR communication robot model.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2020, 14, 1; 39-47
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Assessment of kinematics of sportsmen performing standing long jump in 2 different dynamical conditions
Autorzy:: Szerdiová, L.
Šimšik, D.
Dolná, Z.
Powiązania:: https://bibliotekanauki.pl/articles/221639.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: kinematics
dynamics
standing long jump
human motion analysis
sports
Opis:: This paper presents results of the study devoted to analysis of impact of upper extremities' momentum on the jump length and analysis of selected kinematic data changes during the standing long jump. Four young sportsmen participated in the initial study. They have performed standing long jump in two measuring conditions: with and without arms swinging. Motion was captured using a 3D opto-electronic camera system SMART (BTS) and selected kinematic data were evaluated using software packages and data processing: trajectory of body centre of gravity (COG), velocity of COG, maximal vertical distance of COG, take-off angle together with momentum of upper extremities were analyzed. The data were statistically evaluated using descriptive statistics and analysis of variance. Statistical significance of the kinematic data and jump length were analyzed using the Kruskal-Wallis test and post-hoc test (p<0.05) in Statistics toolbox of Matlab program. Statistically significant differences were assessed within intraindividual and intraclass comparison of data.
Źródło:: Metrology and Measurement Systems; 2012, 19, 1; 85-94
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The impact of geometry errors on the motion transmission of dual path gearing
Autorzy:: Pacana, J.
Pacana, A.
Powiązania:: https://bibliotekanauki.pl/articles/102719.pdf
Data publikacji:: 2016
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: gears
tooth pitch error
gears kinematics
motion transmission errors
FEM
Opis:: The article presents the numerical analysis of the impact of geometry errors on the motion transmission of dual path gearing. The strength calculations of the elements of the drive were made by means of the Finite Elements Method (FEM). The calculations were made for the two-dimensional models of the dual path gearing. In the first place, the drive of the error-free (theoretical) geometry was tested. Next, the modifications of the selected teeth were introduced to the calculation models. The aim of the modifications of the tooth profile was to simulate pitch errors in compliance with the admissible values defined by PN-ISO 1328-1:2015 norm “Cylindrical gears – ISO system of flank tolerance classification”. Finally, all the results were put together for comparison. The obtained results confirm the high irregularity of work gear as a result of errors tooth geometry.
Źródło:: Advances in Science and Technology. Research Journal; 2016, 10, 32; 94-100
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Reliability of the Coach’s Eye Goniometer Application during Squat Exercise
Autorzy:: Kilgallon, Jonathan
Cave, Joseph
Cushion, Emily
Joffe, Shaun
Tallent, Jamie
Powiązania:: https://bibliotekanauki.pl/articles/2138473.pdf
Data publikacji:: 2022
Wydawca:: Uniwersytet Szczeciński. Wydawnictwo Naukowe Uniwersytetu Szczecińskiego
Tematy:: range of motion
kinematics
lower limb joints
two-dimensional analysis
rehabilitation
Opis:: This study examined the test re-test, intrarater and interrater reliability of joint kinematics from the Coach’s Eye smartphone application. Twenty-two males completed a 1-repetition maximum (1-RM) assessment followed by 2 identical sessions using 5 incremental loads (20%-40%-60%-80%-90% 1-RM). Peak flexion angles at the hip, knee, and ankle joints were assessed using 1 experienced practitioner and 1 inexperienced practitioner. The acceptable reliability thresholds were defined as intraclass correlation coefficient (ICC) (r) > 0.70 and coefficient of variation (CV) ≤ 10%. The test re-test reliability of peak hip and knee flexion were reliable across 20-90% 1-RM (r > 0.64; CV < 4.2%), whereas peak ankle flexion was not reliable at any loaded condition (r > 0.70; CV < 20.4%). No significant differences were detected between trials (p > 0.11). The intrarater reliability was near perfect (r > 0.90) except for peak ankle flexion (r > 0.85). The interrater reliability was nearly perfect (r > 0.91) except for hip flexion at 80% 1-RM and ankle flexion at 20% (r > 0.77). Concludingly, the Coach’s Eye application can produce repeatable assessments of joint kinematics using either a single examiner or 2 examiners, regardless of experience level. The Coach’s Eye can accurately monitor squat depth.
Źródło:: Central European Journal of Sport Sciences and Medicine; 2022, 38; 47-59
2300-9705
2353-2807
Pojawia się w:: Central European Journal of Sport Sciences and Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Anatomical protocol for gait analysis: joint kinematics measurement and its repeatability
Autorzy:: Żuk, M.
Trzeciak, M.
Powiązania:: https://bibliotekanauki.pl/articles/281538.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: joint kinematics
gait analysis protocol
repeatability
anatomical protocol
marker-set
motion capture system
Opis:: International Society of Biomechanics has proposed a general reporting standard for joint kinematics based on anatomical reference frames. Nevertheless, the gait analysis protocols based on this standard are still poorly reported. The purpose of the current study is to propose and preliminarily assess the potential of an anatomically based ISB 6-DOF protocol, which combines the ISB reporting standard together with a marker cluster technique. The proposed technical marker set enables full description of the lower limb kinematics (including three-dimensional ankle-foot complex rotations) according to the current biomechanical recommendation. The marker set provides a clinically acceptable inter-trial repeatability and minimal equipment requirements.
Źródło:: Journal of Theoretical and Applied Mechanics; 2017, 55, 1; 369-376
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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