Temat: biomechanical - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Three-dimensional modelling and parameter identification of the seated human body exposed to random vibration
Autorzy:: Maciejewski, Igor
Błażejewski, Andrzej
Pecolt, Sebastian
Krzyzynski, Tomasz
Zaporski, Piotr
Tematy:: biomechanical models
human body
vibration exposure; Pokaż więcej
Data publikacji:: 2023
Powiązania:: https://bibliotekanauki.pl/articles/59316046.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Theoretical and Applied Mechanics; 2023, 61, 4; 833-845
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Opis:: The paper deals with the modelling and parameter identification of the human body in a sitting posture. The advantage of this paper is to announce a simplified, but also a reliable three-mass model representing dynamic behaviour of the main human body parts, i.e. pelvis, torso and head. Their equivalent masses are interconnected by classical mechanical constraints in the form of springs and dampers. The stiffness and damping coefficients are identified by means of an original optimisation procedure that is used to minimise the error between measurement and simulation results. The model is proposed to be used for simulation studies of vibration-induced effects on the human body as well as for defining a specific vibration-isolation properties of automotive seat suspension systems with minimal computing cost and time.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: A comparison of human physical models based on the distribution of power in a dynamic structure in the case of hand-arm vibrations
Autorzy:: Dobry, M. W.
Hermann, T.
Tematy:: hand-arm vibrations
biomechanical system
power distribution; Pokaż więcej
Data publikacji:: 2015
Powiązania:: https://bibliotekanauki.pl/articles/280538.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 1; 3-13
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Opis:: The main aim of this study is to present an energy comparison of two human physical models taking into account hand-arm vibrations, which are based on the power distribution in their dynamic structure. The method used in the study takes advantage of a close relationship between the dynamics of the systems and energy-related phenomena that occur within them. The energy comparison of the two human physical models required construction of energy models of a Human-Tool system and finding their solutions. For this purpose, programs have been developed using the MATLAB/simulink software to simulate power distribution in the systems. The simulation revealed a discrepancy between the two models in terms of three types of powers and globally in the system as a whole.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Motion capture as a modern technology for analysing ergometer rowing
Autorzy:: Skublewska-Paszkowska, M.
Montusiewicz, J.
Łukasik, E.
Pszczoła-Pasierbiewicz, I.
Baran, K. R.
Smołka, J.
Pueo, B.
Tematy:: motion capture
ergometer rowing
biomechanical body parameters; Pokaż więcej
Data publikacji:: 2016
Powiązania:: https://bibliotekanauki.pl/articles/957966.pdf Link otwiera się w nowym oknie
Źródło:: Advances in Science and Technology. Research Journal; 2016, 10, 29; 132-140
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Opis:: The paper presents a purpose-built laboratory stand consisting of a Vicon motion capture system with reference video cameras, wireless EMG system, Concept 2 Indoor Rower ergometer, wireless heart rate monitor and the Nexus software. A pilot study of people who exercise on the ergometer helped to create a proper configuration of all the components of the laboratory. Moreover, a procedure for carrying out research was developed, which consists of several steps divided into 4 stages: preparation of the motion acquisition system; preparation of the participant; familiarising participants with the technique of rowing, recording their movements and acquiring other measurement signals. Preliminary analysis of the results obtained from heterogeneous signals from various devices showed that all the components of the research stand are mutually compatible and the received signals do not interfere with one another.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Differences in energy flow in three directions in Human-Tool biomechanical systems based on spatial human physical models specified in the ISO 10068:2012 standard
Autorzy:: Dobry, M. W.
Hermann, T.
Tematy:: biomechanical system
energy flow
hand-arm vibrations; Pokaż więcej
Data publikacji:: 2015
Powiązania:: https://bibliotekanauki.pl/articles/280536.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Theoretical and Applied Mechanics; 2015, 53, 4; 789-798
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Opis:: The article presents the differences in energy flow for two human physical models from ISO 10068:2012. The models are compared on the basis of a numerical simulation of energy flow implemented with MATLAB/simulink software. For purposes of comparison, the dynamics of the two Human-Tool systems is mathematically modelled and then used to derive their energy models. The model dynamic structures are fully specified in order to determine and compare three kinds of powers. The study revealed differences between the model characteristics when analysed along different directions of vibrations and as a whole.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Computerized static posturography and laterality in children : Influence of age
Autorzy:: Bourelle, S.
Dey, N.
Sifaki-Pistolla, D.
Berge, B.
Gautheron, V.
Cottalorda, J.
Taiar, R.
Tematy:: dzieci
posturografia
biomechanika
children
balance platform
biomechanical response; Pokaż więcej
Data publikacji:: 2017
Powiązania:: https://bibliotekanauki.pl/articles/307081.pdf Link otwiera się w nowym oknie
Źródło:: Acta of Bioengineering and Biomechanics; 2017, 19, 2; 129-139
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Opis:: The present study aims to explore relationships between footedness and posturographic assessment in children aged from 4 to 10. A real-time computerised device was used on a force plate for movement analysis. It requires a static posturography to assess postural control of children with the same handedness and footedness. Methods: Thirty eight right-handed and right-footed children organized in three age groups of 4 to 6 years old, 6 to 8 years old and 8 to 10 years old participated in the study. Two statical tests, the Unilateral Stance (US) and the Weight Bearing Squat (WBS) were performed, jointly with a dynamic balance examination (Limits of Stability (LOS)). All these tests were executed to explore the body capability of the right/left side. Results: The study demonstrated significant differences involving the right/left side among the three age groups. Better performance on the youngest children’s right part and on the oldest children’s left part was observed. Differences between the left and right sides of the body were noticeably revealed by posturographic assessments in right-handed and right-footed children. Conclusions: Age seemed to be a determinant for these outcomes. Maturation of the vestibular at the ages of 6 or 7 years might explain the observed differences between the youngest children and older-children.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Biomechanical modelling for whole body motion using natural coordinates
Biomechaniczne modelowanie trójwymiarowych ruchów człowieka w środowisku współrzędnych naturalnych
Autorzy:: Czaplicki, A.
Silva, M. T.
Ambrosio, J. C.
Tematy:: biomechanical model
multibody dynamics
inverse dynamics
internal forces; Pokaż więcej
Data publikacji:: 2004
Powiązania:: https://bibliotekanauki.pl/articles/281844.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Theoretical and Applied Mechanics; 2004, 42, 4; 927-944
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Opis:: The study of spatial human movements requires the development and use of a three-dimensional model. The model proposed here has 44 degrees-of-freedom and it is described using natural coordinates, which do not require an explicit definition of rotation coordinates. The biomechanical model consists of 16 anatomical segments composed of 33 rigid bodies. Joint actuators are introduced into equations of motion of the multibody model by means of kinematic driver constrains in order to reflect the effect of the muscle forces about each anatomical joint. After associating a Lagrange multiplier to each joint actuator, the torques that represent muscle forces become coupled with the biomechanical model through the Jacobian matrix of the underlying multibody system. The developed model is applied to identify net torques and reaction forces at the anatomical joints in application cases that include the take-off to aerial trajectories and standing backwards somersault.
W pracy zaprezentowano pełną metodologię do badania ruchów człowieka. Podstawowym elementem tej metodologii jest trójwymiarowy biomechaniczny model ciała ludzkiego. Położenia członów modelu opisano za pomocą współrzędnych naturalnych, co wyeliminowało konieczność użycia współrzędnych kątowych. Model składa się z 33 ciał sztywnych połączonych przegubami (stawami) i posiada 44 stopnie swobody. Wypadkowe momenty sterujące w poszczególnych stawach pochodzące od sił mięśniowych wprowadzono do dynamicznych równań ruchu modelu za pomocą stosownych więzów kinematycznych pomiędzy sąsiadującymi członami w danym stawie. Wartości tych momentów wyznaczono wykorzystując formalizm mnożników Lagrange'a. Model wykorzystano do identyfikacji wypadkowych momentów mięśniowych i reakcji wewnętrznych w głównych stawach kończyny dolnej człowieka podczas odbicia do skoku w dal oraz w trakcie wykonywania salta w tył z miejsca.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Biomechanical criterion of dynamic stability based on ZMP formula and Flash-Hogan principle of minimum jerk
Autorzy:: Ilewicz, Grzegorz
Mrozowski, Jerzy
Awrejcewicz, Jan
Zagrodny, Bartłomiej
Ludwicki, Michał
Tematy:: biomechanical stability
jerk
Flash-Hogan principle
ZMP
Optitrack; Pokaż więcej
Data publikacji:: 2023
Powiązania:: https://bibliotekanauki.pl/articles/2200881.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Theoretical and Applied Mechanics; 2023, 61, 1; 3--9
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Opis:: The main aim of the article is to define a criterion of dynamic stability based on the Flash- Hogan principle and the ZMP method. The gait researches were focused on analysis and observation of the human biomechanism with the optical system Optitrack. The smooth reference trajectory is defined forming a stability pattern. The optimal, due to the minimum jerk criterion, ZMP trajectory is illustrated in the results Section in order to demonstrate the dynamic stability pattern for the needs of rehabilitation in cases of neuromuscular damage or injuries affecting gait stability.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Study of a horizontal seat suspension with a model of the seated human body and energy recovery braking subsystem
Autorzy:: Maciejewski, Igor
Pecolt, Sebastian
Błazejewski, Andrzej
Jereczek, Bartosz
Krzyzynski, Tomasz
Tematy:: biomechanical model
seat suspension
energy recuperation; Pokaż więcej
Data publikacji:: 2024
Powiązania:: https://bibliotekanauki.pl/articles/62645011.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Theoretical and Applied Mechanics; 2024, Vol. 62 nr 2; 321-335
1429-2955
2543-6309
Opis:: This article explains the mechanics, control strategies and main applications of a new concept which achieves a balance between energy saving and driver comfort. A physical and mathematical model of a suspension system with energy recovery is presented. It shows practical implementation of the BLDC braking system with energy recovery in a horizontal seat suspension and a detailed simulation analysis of their features and performance. The research involves a specific solution, with a specific BLDC motor, and experimental tests on a laboratory stand. The results of the simulation study using a simplified biomechanical model and experimental studies with human participation are presented.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Pelvis and thoracolumbar spine response in simulated under-body blast impacts and protective seat cushion design
Autorzy:: Luo, Wei
Niu, Kun
Mo, Fuhao
Li, Guibing
Tematy:: under-body blast
thoracolumbar spine
biomechanical modelling
protective cushion; Pokaż więcej
Data publikacji:: 2024
Powiązania:: https://bibliotekanauki.pl/articles/55622226.pdf Link otwiera się w nowym oknie
Źródło:: Acta of Bioengineering and Biomechanics; 2024, 26, 1; 143-151
1509-409X
2450-6303
Pojawia się w:: Acta of Bioengineering and Biomechanics
Opis:: The aim of this study is to investigate the dynamic and biomechanical response of the pelvis and thoracolumbar spine in simulated under-body blast (UBB) impacts and design of protective seat cushion for thoracolumbar spine injuries. Methods: A wholebody FE (finite element) human body model in the anthropometry of Chinese 50th% adult male (named as C-HBM) was validated against existing PHMS (Postmortem Human Subjects) test data and employed to understand the dynamic and biomechanical response of the pelvis and thoracolumbar spine from FE simulations of UBB impacts. Then, the protective capability of different seat cushion designs for UBB pelvis and thoracolumbar injury risk was compared based on the predictions of the C-HBM. Results: The predicted spinal accelerations from the C-HUM are almost within the PHMS corridors. UBB impact combined with the effects from physiological curve of the human thoracolumbar spine and torso inertia leads to thoracolumbar spine anterior bending and axial compression, which results in stress concentration in the segments of T4–T8, T12–L1 and L4–L5. Foam seat cushion can effectively reduce the risk of thoracolumbar spine injury of armored vehicle occupants in UBB impacts, and the DO3 foam has better protective performance than ordinary foam, the 60 mm thick DO3 foam could reduce pelvic acceleration peak and DRIz value by 52.8% and 17.2%, respectively. Conclusions: UBB spinal injury risk is sensitive to the input load level, but reducing the pelvic acceleration peak only is not enough for protection of spinal UBB injury risk, control of torso inertia effect would be much helpful.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Problemy oceny narażenia człowieka na drgania miejscowe w przypadku użycia rękawic i zastosowania metod konwencjonalnej oraz energetycznej
Problems of evaluation of human exposure to hand-arm vibrations in case of using gloves based on application of conventional and energy methods
Autorzy:: Hermann, T.
Dobry, M. W.
Tematy:: system biomechaniczny
metoda energetyczna
rękawica
biomechanical system
energy method
glove; Pokaż więcej
Data publikacji:: 2018
Powiązania:: https://bibliotekanauki.pl/articles/202529.pdf Link otwiera się w nowym oknie
Źródło:: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie; 2018, 78; 35-50
0239-9415
Pojawia się w:: Zeszyty Naukowe Politechniki Poznańskiej. Organizacja i Zarządzanie
Opis:: W pracy przedstawiono porównanie wyników oceny narażenia człowieka na drgania miejscowe w przypadku zastosowania rękawic. Analizowany przypadek oceniono dwoma metodami, tzn. metodą konwencjonalną (z uwzględnieniem kryterialnego przyspieszenia drgań) i metodą energetyczną (wykorzystując wartości składników energii związanych z człowiekiem). Analizy przeprowadzono na podstawie wyników badań teoretycznych w systemie biodynamicznym człowiek - zmechanizowane narzędzie ręczne. W tym celu wykorzystano modele człowieka i rękawicy określone w normie ISO 10068:2012. Przeprowadzona analiza wykazała, że każda z metod daje inne wyniki oceny wpływu rękawic na ochronę człowieka. W artykule przedstawiono analityczne rezultaty i różnice w ocenie narażenia człowieka na drgania miejscowe otrzymane obiema metodami dla przykładowej sytuacji pracy operatora z wykorzystaniem zmechanizowanego narzędzia ręcznego.
The article presents a comparison of the results of human exposure to hand-arm vibration in case of using gloves. The analyzed case was assessed by two methods, i.e., performed by conventional method (including the criterion of accelerations of vibrations) and energy method (based on the dose of energy flowing through the human during the operation of the tool). The analyzes were based on the results of the theoretical studies of biodynamics and energy flow in the human - tool system. The models of the human and the glove, specified in the ISO 10068:2012 standard, were used for this purpose. The analysis showed that results of the evaluation of the impact of gloves on human protection obtained between both methods are different. The article presents the analytical results and differences in the assessment of human exposure to hand-arm vibrations, using both methods, as an example for a situation, in which an operator works with mechanized handheld tool.
Dostawca treści:: Biblioteka Nauki

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