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Journal articles on the topic 'Vestaty with combined kinematic structure'

Author: Grafiati

Published: 28 May 2022

Last updated: 18 July 2025

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1

Bensalma, Fatima, Glen Richardson, Youssef Ouakrim, et al. "A Combined Visualization Method for Multivariate Data Analysis. Application to Knee Kinematic and Clinical Parameters Relationships." Applied Sciences 10, no. 5 (2020): 1762. http://dx.doi.org/10.3390/app10051762.

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This paper aims to analyze the correlation structure between the kinematic and clinical parameters of an end-staged knee osteoarthritis population. The kinematic data are a set of characteristics derived from 3D knee kinematic patterns. The clinical parameters include the answers of a clinical questionnaire and the patient’s demographic characteristics. The proposed method performs, first, a regularized canonical correlation analysis (RCCA) to evaluate the multivariate relationship between the clinical and kinematic datasets, and second, a combined visualization method to better understand the

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2

Tian, Chunxu, Yuefa Fang, Sheng Guo, and Haibo Qu. "Structure synthesis of reconfigurable parallel mechanisms with closed-loop metamorphic linkages." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 7 (2017): 1303–16. http://dx.doi.org/10.1177/0954406217703418.

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This paper proposes a class of closed-loop metamorphic linkages, which has different phases resulting from links annexing or locking of motors. Reconfigurable limbs are obtained by assembling these metamorphic linkages with kinematic chains. The potential metamorphic linkages are presented and the working phase transformation of the metamorphic linkages is analyzed. After adding suitable kinematic joints to the metamorphic linkage, the reconfigurable limbs whose constraint can be switched among different constraint forces and couples are synthesized. The serial limbs that can provide u ( u = 0

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Chiou, Jiunn-Shyang, Wen-Yi Hung, Yi-Ting Lee, and Zong-Han Young. "Combined dynamic structure-pile-soil interaction analysis considering inertial and kinematic effects." Computers and Geotechnics 125 (September 2020): 103671. http://dx.doi.org/10.1016/j.compgeo.2020.103671.

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Kwon, Sun-Yong. "Effect of Inertial and Kinetic Forces of a Soil–Pile–Structure System on the Behavior of a Superstructure Under Earthquake." Applied Sciences 15, no. 9 (2025): 5085. https://doi.org/10.3390/app15095085.

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The seismic behavior of pile-supported structures is influenced by complex interactions between inertial force and kinematic force mainly drawn by soil properties and superstructure characteristics. This study aims to investigate the combined effects of inertial and kinematic interaction on the dynamic response of pile foundations under seismic loading. To achieve this, three-dimensional numerical simulations were conducted using FLAC3D, based on a bridge substructure model. A total of twelve analysis cases were developed by varying input seismic motion levels, soil relative densities, and pil

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Zhou, Wan Chun, and Dong Min Liu. "The Creative Design of Injector Clamping Mechanism." Advanced Materials Research 418-420 (December 2011): 2166–69. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2166.

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Abstract. Analysis of a certain topological structure characteristics of clamping mechanism of injection machine, according to general principles, converts it into only containing Deputy General of the connecting rod and rotating chain. Bodies comprehensive theory of numbers after distribution combined with rod classes are general Atlas of kinematic chain. After identifying design constraints, on the redistribute members and turn the pair, you can get all man foot design requirements of viable specific Atlas of kinematic chains. Then every possible specific kinematic chain materialized to the

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Smars, Pierre. "Kinematic Stability of Masonry Arches." Advanced Materials Research 133-134 (October 2010): 429–34. http://dx.doi.org/10.4028/www.scientific.net/amr.133-134.429.

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To quantify the safety of masonry arches and vaults using limit-analysis, various types of safety factors have been devised. The most well-known were introduced by Heyman: a “static factor of safety” (or load factor) assessing how vulnerable the structure is to increases in the living loads and a “geometrical factor of safety” assessing how critical the thickness of the structure is for its stability. In non seismic areas, one of the main risks of total or partial collapse of arches and vaults is excessive displacement of the supports (following walls or soil deformation). Limit analysis techn

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Yu, Ming, Wenwen Liu, Jian Zhao, Yanyan Hou, Xuewu Hong, and Hongjie Zhang. "Modeling and Analysis of a Composite Structure-Based Soft Pneumatic Actuators for Soft-Robotic Gripper." Sensors 22, no. 13 (2022): 4851. http://dx.doi.org/10.3390/s22134851.

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Soft pneumatic actuators are extensively used in soft robots, and their bending angles and kinematic rules at different pressures play a crucial role in practical applications. This investigation aims to model the bending angle and motion of a new type of soft pneumatic actuator that adopts a composite structure consisting of two kinds of pneumatic networks. Based on the structural and deformation characteristics of the proposed soft actuator, the constitutive model is established, and then the moment equilibrium and virtual work principle are combined to model the bending angle of two pneumat

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Beivydas, Edmundas. "VIENO TARPATRAMIO KABAMOSIOS KOMBINUOTOS STYGINĖS PLIENO KONSTRUKCIJOS SKAITINĖ ANALIZĖ / STRUCTURAL ANALYSIS OF ONE-SPAN SUSPENSION COMBINED STRING STEEL BRIDGE." Mokslas - Lietuvos ateitis 10 (December 21, 2018): 1–5. http://dx.doi.org/10.3846/mla.2018.2867.

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The Journal discusses the behavior of a single-span composite string structure, when the string and the supporting rope are absolutely flexible elements. The behavior of such a structure with symmetric and asymmetric loads is analyzed. The influence of the string on the elastic and kinematic displacements is considered. Changing the ratio between the axial stiffness of the strings and auxiliary rope and the initial rotation of the auxiliary rope, the structure of the elastic and kinematic shifts is analyzed, the most rational variants are sought and the recommendations for composing are presen

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Khudainazarov, Sherzod, Burkhon Donayev, Talibjan Sabirjanov, and Jahongir Qosimov. "Dynamics of high-rise structures taking into account the viscoelastic properties of the material." E3S Web of Conferences 304 (2021): 02004. http://dx.doi.org/10.1051/e3sconf/202130402004.

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The article deals with forced vibrations of a high-rise axisymmetric structure, represented as a viscoelastic beam of an annular section with a variable slope of the generatrices and variable thickness. The research was conducted to analyze the behavior of a high-rise structure for various kinematic effects. The task is to determine the displacements of the points of a high-rise structure at different time points under different kinematic effects. The methods were developed and a computer program was built; forced vibrations of high-rise axisymmetric structures under various kinematic actions,

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10

BUENO, J. R., and D. D. LORIGGIO. "Analysis of second order effects: case study." Revista IBRACON de Estruturas e Materiais 9, no. 4 (2016): 494–501. http://dx.doi.org/10.1590/s1983-41952016000400002.

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Abstract This paper presents a nonlinear static analysis of a reinforced concrete plane frame. It has as main objective is to realize a global stability verification of a plane frame, by using geometric stiffness matrix. In order to obtain first and second order combined effects, equilibrium and kinematic relations were studied in the deformed geometric configuration. These results were obtained by using geometric stiffness matrix and multiplying horizontal forces by Gamma-Z coefficient. Both procedures disclosed very similar results in the study, indicating that Gamma-Z can be used to study e

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Moiseev, S. A., and E. A. Mikhaylova. "FUNCTIONAL SYNERGY ENSURES A TRAMPOLINE JUMP STOPPING." Журнал эволюционной биохимии и физиологии 59, no. 4 (2023): 243–54. http://dx.doi.org/10.31857/s0044452923040058.

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The paper considers the structure of intermuscular synergetic interaction that ensures the athlete’s body stopping on the trampoline after a jump. We compared the spatio-temporal characteristics of muscle synergies extracted from the skeletal muscles electroactivity amplitude and frequency of biopotentials data. The objective of the study was to find out whether the extracted kinematic modules represent the central mechanisms for the movement structure controlling as well as to determine the variables which should be stabilized by muscle synergies activity. The extraction of synergies was carr

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12

Qin, Qin, Jigang Huang, and Jin Yao. "A real-time adaptive look-ahead speed control algorithm for FDM-based additive manufacturing technology with Hbot kinematic system." Rapid Prototyping Journal 25, no. 6 (2019): 1095–107. http://dx.doi.org/10.1108/rpj-11-2018-0291.

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Purpose The purpose of this paper is to enhance the accuracy as well as efficiency of high-speed machining, avoid the speed fluctuation caused by acceleration/deceleration (ACC/DEC) and increase the smoothness of feedrate in continuous corners or curves machining. The Hbot kinematic system was analyzed and combined with fused deposition modeling-based (FDM) additive manufacturing (AM) technology. Then a real-time adaptive look-ahead speed control algorithm was proposed. Design/methodology/approach To validate the performance of Hbot kinematic system and the proposed speed control algorithm, th

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Kammermeier, Peter, Alexander Kron, Jens Hoogen, and Günther Schmidt. "Display of Holistic Haptic Sensations by Combined Tactile and Kinesthetic Feedback." Presence: Teleoperators and Virtual Environments 13, no. 1 (2004): 1–15. http://dx.doi.org/10.1162/105474604774048199.

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This article presents conceptual as well as experimental work toward the display of holistic haptic sensations in telepresence and virtual environment applications. (In this context holistic is understood in the sense of “not neglecting an essential component.”) In contrast to most existing developments, the presented haptic humansystem interface is a combination of dedicated subsystems for both kinesthetic and tactile display. With respect to the mechanical coupling of both subsystems, we propose two basic approaches. One is based on a parallel kinematic system setup and forms the conceptual

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14

Polizzotto, Castrenze. "On the Conditions to Prevent Plastic Shakedown of Structures: Part II—The Plastic Shakedown Limit Load." Journal of Applied Mechanics 60, no. 1 (1993): 20–25. http://dx.doi.org/10.1115/1.2900750.

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Following the results of a companion paper, the concept of plastic shakedown limit load is introduced for an elastic-perfectly plastic material structure subjected to combined cyclic (mechanical and/or kinematical) loads and steady (mechanical) load. Static and kinematic approaches are available for the computation of this load, in perfect analogy with the classic (elastic) shakedown limit load. The plastic shakedown limit state of the structure being in an impending alternating plasticity collapse is studied and a number of interesting features of it are pointed out.

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15

Schappler, Moritz. "Dimensional Synthesis of Parallel Robots Using Bilevel Optimization for Design Optimization and Resolution of Functional Redundancy." Robotics 14, no. 3 (2025): 29. https://doi.org/10.3390/robotics14030029.

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Parallel-kinematic machines or parallel robots have only been established in a few applications where their advantage over serial kinematics due to their high payload capacity, stiffness, or dynamics with their limited workspace-to-installation-space ratio pays out. However, some applications still have not yet been sufficiently or satisfactorily automated in which parallel robots could be advantageous. As their performance is much more dependent on their complex dimensioning, an automated design tool—not existing yet—is required to optimize the parameterization of parallel robots for applicat

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García-Díaz, Maria-Teresa, Jose-Alberto López, Wofgang Steffen, Michael G. Richer, and Hortensia Riesgo. "A Cat's Eye view of the Eskimo from Saturn." Proceedings of the International Astronomical Union 7, S283 (2011): 366–67. http://dx.doi.org/10.1017/s1743921312011453.

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AbstractThe 3-D and kinematic structure of the Eskimo nebula, NGC 2392, has been notoriously difficult to interpret given its complex morphology, multiple kinematic components and its nearly pole-on orientation along the line of sight. Here we present the most comprehensive high resolution spectroscopic mapping of the Eskimo planetary nebula to date. The data consist of 21 spatially resolved, long-slit echelle spectra tightly spaced over the Eskimo and along its bipolar jets. This data set allowed us to construct a velocity-resolved [NII] channel map of the nebula with a resolution of 10 km/s

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17

Wu, Yi-Chang, and Hong-Sen Yan. "DESIGN OF SURFACE-MOUNTED PERMANENT-MAGNET BRUSHLESS DC MOTORS COMBINED WITH GEAR MECHANISMS." Transactions of the Canadian Society for Mechanical Engineering 37, no. 3 (2013): 439–48. http://dx.doi.org/10.1139/tcsme-2013-0033.

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This paper presents novel design concepts by integrating surface-mounted permanent-magnet brushless DC (BLDC) motors with embedded planetary gear trains (PGTs) to form compact structure assemblies with desired functions. The operational principles and configurations of surface-mounted permanent-magnet BLDC motors are introduced. With the aid of fundamental circuits, kinematic characteristics of PGTs are identified. For rationalizing integrated design concepts, design requirements and constraints are concluded. Four feasible design concepts with interior and exterior configurations are successf

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18

Xiong, Jiaming, Song Sang, Youwei Du, Chaojie Gan, Ao Zhang, and Fugang Liu. "Kinematic Stability Analysis of Anchor Cable Structures in Submerged Floating Tunnel under Combined Parametric–Vortex Excitation." Journal of Marine Science and Engineering 12, no. 9 (2024): 1478. http://dx.doi.org/10.3390/jmse12091478.

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The submerged floating tunnel is a marine transportation infrastructure that links two shorelines. The tunnel tube body’s buoyancy exceeds gravity, with anchoring ensuring equilibrium. Anchoring reliability is crucial. This study presents a three-way coupled kinematic model for the mooring structure, formulated on Hamilton’s principle and Kirchhoff’s assumption. It explores the impact of the tube body’s buoyancy-to-weight ratio and the sea current’s angle of incidence on mooring motion response. By solving the motion analysis model, Hill’s equation system is derived to assess the parameter ins

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19

Wang, Hu, Wei Dai, Jihao Qin, and Jiangrong Qian. "Research on the overall structure design and key technologies of a single-vehicle mobile radar with high integration." Journal of Physics: Conference Series 3043, no. 1 (2025): 012043. https://doi.org/10.1088/1742-6596/3043/1/012043.

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Abstract To meet the demands of high mobility and rapid deployment in modern warfare, conventional multi-vehicle mobile radars have shown increasing limitations in integration and mobility. This paper focuses on a single-vehicle mobile radar with high integration by introducing an adaptive locking technology for high-rigidity turntable transportation. Combined with mechanical simulation, this approach ensures the safety and reliability of the turntable during road transportation. Furthermore, ergonomics simulation tailored for single-vehicle with high integration design is employed to optimize

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20

Teke, Budaklı Merve, Cuneyt Yılmaz, and Faruk Bagcı. "The Design and Control of a New Lower Limb Rehabilitation Robot for Active and Active-assisted Exercises." Euroasia Journal of Mathematics, Engineering, Natural & Medical Sciences 10, no. 31 (2023): 66–91. https://doi.org/10.5281/zenodo.10445926.

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The high position accuracy and rigidity of robots are very important in interventions to the human body. Due to its closed chain kinematic structure, parallel robots exhibit superior positioning accuracy and rigid body structure. Although these reasons lead to the preference of rehabilitation robots, the closed chain kinematic structure introduces a limited working space which restricts the robot to perform the necessary rehabilitation exercises through one joint, solely. Based on this fact, a newly constructed rehabilitation robot ensuring the same positioning accuracy of a parallel robot and

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Guo, Hongyang. "Comparative Analysis of Structure and Motion of Vision Logistics Robotic Arms." Highlights in Science, Engineering and Technology 111 (August 19, 2024): 607–19. http://dx.doi.org/10.54097/zmfjpe29.

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This paper combines visual recognition and robotic arm, optimizes the design of robotic arm structure, and researches the logistics robotic arm with six degrees of freedom and visual perception ability to enrich the logistics robotic use scene. Firstly, the visual recognition system is installed on the existing six-degree-of-freedom robotic arm, and the coordinate system is established by the light bar recognition method combined with the D-H parameter method. Secondly, a kinematic simulation model was established by using MATLAB, and the state of the joints was analyzed by using forward and i

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22

Tikhomirova, I. A., and S. V. Tararykin. "Development and research of selectively invariant electromechanical systems with elastic kinematic units based on the separation of the harmonic disturbance model." Vestnik IGEU, no. 1 (February 28, 2021): 49–59. http://dx.doi.org/10.17588/2072-2672.2021.1.049-059.

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Currently there is a big variety of structure solutions of the selective invariant electromechanical systems with different layout schemes of disturbance internal model for electric drives with robust kinematic units. However, methods of structural parametric synthesis for controllers with combined triggering model only were developed selective invariant systems with “robust” kinematic of mechanical part. Consequently, further improvement of the structure variety of systems for special effects of elastic kinematic units of mechanical part is of current interest. It can be performed by includin

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Paniagua-Contro, P., E. G. Hernandez-Martinez, O. González-Medina, et al. "Extension of Leader-Follower Behaviours for Wheeled Mobile Robots in Multirobot Coordination." Mathematical Problems in Engineering 2019 (April 2, 2019): 1–16. http://dx.doi.org/10.1155/2019/4957259.

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This paper presents the extension of leader-follower behaviours, for the case of a combined set of kinematic models of omnidirectional and differential-drive wheeled mobile robots. The control strategies are based on the decentralized measurements of distance and heading angles. Combining the kinematic models, the control strategies produce the standard and new mechanical behaviours related to rigid body or n-trailer approaches. The analysis is given in pairs of robots and extended to the case of multiple robots with a directed tree-shaped communication topology. Combining these behaviours, it

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Zhang, Enzhong, Ruiyang Sun, Zaixiang Pang, and Shuai Liu. "Obstacle Capability of an Air-Ground Amphibious Reconnaissance Robot with a Planetary Wheel-Leg Type Structure." Applied Bionics and Biomechanics 2021 (November 18, 2021): 1–12. http://dx.doi.org/10.1155/2021/7925707.

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According to the requirements of the reconnaissance robot for the ability to adapt to a complex environment and the in-depth study of the obstacle climbing mechanisms, a planetary wheel-leg-combined mechanism capable of adapting to complex terrains is proposed. According to the proposed planetary wheel-leg-combined mechanism, the land part of the air-ground amphibious reconnaissance robot is designed. Considering the obstacle and fast marching performance, four groups of combined wheel-leg mechanisms are adopted in the land bank. Under the action of three kinds of obstacles, the stability and

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Zhang, Yu, Li, and Fan. "Computational Modeling Methods for Deployable Structure Based on Alternatively Asymmetric Triangulation." Symmetry 11, no. 10 (2019): 1278. http://dx.doi.org/10.3390/sym11101278.

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Asymmetric triangulation is an interesting method combined with concentric pleating to obtain a 3D shape without stretching or tearing. There exists some geometric properties in the process of folding to help realize extension and contraction, which can be used in parametric modeling of different regular polygons. To facilitate design and modeling, adequate computational modeling methods are indispensable. This paper proposes a new mathematical idea and presents a feasible way to build the parameterized models in the digital environment of Rhinoceros, utilizing the Kangaroo plugin in Grasshopp

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Tătar, Mihai Olimpiu, and Claudiu Cirebea. "Mobile Minirobot with Hybrid Locomotion." Solid State Phenomena 260 (July 2017): 51–58. http://dx.doi.org/10.4028/www.scientific.net/ssp.260.51.

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In this paper the authors present a mobile minirobot with a hybrid locomotion system. The proposed locomotion system combines the advantages of legged locomotion with the advantages of wheeled locomotion. Due to the proposed structure, the minirobot allows three ways of locomotion: legged, wheeled and combined. The paper describes the experimental prototype, the electronic components needed for controlling the minirobot and it analyses locomotion possibilities by using wheels and legs. The end of the paper presents the kinematic model for a single leg of the minirobot.

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Shi, Yunde, Shilin Li, Mingqiu Guo, Yuan Yang, Dan Xia, and Xiang Luo. "Structural Design, Simulation and Experiment of Quadruped Robot." Applied Sciences 11, no. 22 (2021): 10705. http://dx.doi.org/10.3390/app112210705.

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This paper carried out a series of designs, simulations and implementations by using the physical-like mechanism of a bionic quadruped robot dog as a vehicle. Through an investigation of the walking mechanisms of quadrupeds, a bionic structure is proposed that is capable of omnidirectional movements and smooth motions. Furthermore, the kinematic and inverse kinematic solutions based on the DH method are explored to lay the foundation for the gait algorithm. Afterward, a classical compound pendulum equation is applied as the foot-end trajectory and inverse kinematic solutions are combined to co

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Koçak, Mertcan, and Erkin Gezgin. "Unified Design Methodology for a Polycentric Transfemoral Knee Prosthesis Using Kinematic Synthesis." Machines 13, no. 1 (2024): 20. https://doi.org/10.3390/machines13010020.

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This study introduces a novel single-degree-of-freedom polycentric knee mechanism specifically designed for transfemoral prostheses to address dual challenges of stability during the stance phase and biomimetic motion during the swing phase. Leveraging analytical kinematic synthesis, the proposed mechanism integrates separate kinematic designs for each of the gait phases into a combined structure that prevents singularity issues during full knee flexion, which is a significant limitation in conventional active designs. The stance phase mechanism emphasizes stability through precise control of

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29

Lin, Peigen, Robert S. Pickart, Kerstin Jochumsen, et al. "Kinematic Structure and Dynamics of the Denmark Strait Overflow from Ship-Based Observations." Journal of Physical Oceanography 50, no. 11 (2020): 3235–51. http://dx.doi.org/10.1175/jpo-d-20-0095.1.

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AbstractThe dense outflow through Denmark Strait is the largest contributor to the lower limb of the Atlantic meridional overturning circulation, yet a description of the full velocity field across the strait remains incomplete. Here we analyze a set of 22 shipboard hydrographic–velocity sections occupied along the Látrabjarg transect at the Denmark Strait sill, obtained over the time period 1993–2018. The sections provide the first complete view of the kinematic components at the sill: the shelfbreak East Greenland Current (EGC), the combined flow of the separated EGC, and the North Icelandic

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30

Alhajj Chehade, Hicham, Daniel Dias, Marwan Sadek, Fadi Hage Chehade, and Orianne Jenck. "Seismic internal stability assessment of geosynthetic reinforced earth retaining wall in cohesive soil using limit analysis." MATEC Web of Conferences 281 (2019): 02008. http://dx.doi.org/10.1051/matecconf/201928102008.

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Assessment of internal seismic stability of geosynthetic reinforced cohesive soil retaining walls with likelihood for developing cracks in the failure mechanism is typically done with the limit equilibrium method. However, in this paper, the kinematic theorem of limit analysis combined with the discretization method are used to implement the crack formation in the collapse mechanism in the internal seismic assessment of geosynthetic reinforced soil retaining walls within the framework of the pseudo-static approach. The presence of the crack leads to an increase of the required reinforcement st

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Wei, Yuli. "Kinematics Analysis and Modelling Based on 4 DOF Industrial Robot." Journal of Physics: Conference Series 2562, no. 1 (2023): 012076. http://dx.doi.org/10.1088/1742-6596/2562/1/012076.

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Abstract With the rapid progress of science and technology, industrial manufacturing and processing technology have also developed rapidly. Industrial robots are widely used in many industrial fields. In this paper, based on the familiarity with the structure and principle of the 4 DOF industrial robot, combined with the virtual simulation platform, the kinematics analysis, modelling, and simulation of the 4 DOF industrial robot are studied. Firstly, the structure of the 4 DOF industrial robot is analyzed, the coordinate transformation is studied, and the coordinate transformation simulation i

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Ma, Guo Qing, Zheng Lin Yu, Guo Hua Cao, Yan Bin Zheng, and Li Liu. "The Kinematic Analysis and Trajectory Planning Study of High-Speed SCARA Robot Handling Operation." Applied Mechanics and Materials 687-691 (November 2014): 294–99. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.294.

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Successfully developed of high-speed SCARA robot provides the possibility for fast handling. After analyzed the mechanical structure of SCARA robot, the kinematics equations were built to analyze forward and inverse kinematics problems based on modified D-H coordinate system theory. The trajectory planning was achieved by using the cubic polynomial interpolation method in joint space over the path points combined with motion parameters, the kinematics and trajectory planning were simulated by using matlab simulation platform. Simulation results show that robot parameter design is reasonable an

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Guan, Feng, Chuanxi Zhou, and Qingshi Huang. "An Innovative Planetary Gear Reducer with Overcoming the “Dead Point”." Open Mechanical Engineering Journal 7, no. 1 (2013): 70–75. http://dx.doi.org/10.2174/1874155x01307010070.

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This paper proposes an innovative planetary gear reducer with overcoming the “dead point”, which is to be able to maintain expected reduction ratio by overcoming the “dead point” during the transmission motion. The motion characteristic is combined with the features of parallelogram mechanism transmission and planetary transmission mechanism with small teeth number difference. Structure analysis and force analysis of the mechanism are provided to explain working principle and kinematic feasibility of the mechanism. Three basic structure forms are proposed with a simple ring plate, two ring pla

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Wang, Mingyang, Songlin Yue, Ning Zhang, Kanghua Gao, and Derong Wang. "A Method of Calculating Critical Depth of Burial of Explosive Charges to Generate Bulging and Cratering in Rock." Shock and Vibration 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/6860743.

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For underground explosions, a thin to medium thickness layer near the cavity of an explosion can be considered a theoretical shell structure. Detonation products transmit the effective energy of explosives to this shell which can expand thus leading to irreversible deformation of the surrounding medium. Based on mass conservation, incompressible conditions, and boundary conditions, the possible kinematic velocity fields in the plastic zone are established. Based on limit equilibrium theory, this work built equations of material resistance corresponding to different possible kinematic velocity

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Todorović, Vuk, Milan Blagojević, and Nikola Nešić. "Application of screw theory and its implementation in Python for controlling a Niryo One manipulator." Scientific Technical Review 74, no. 2 (2024): 23–31. https://doi.org/10.5937/oteh2402023t.

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The representation of a robot's configuration can be diverse, each with its advantages and disadvantages. In this paper, we approach the problem using screw theory, which states that all rigid-body motion can be represented with a rotation and translation along a screw axis. Using this as a basis, we'll be tackling the inverse kinematic problem of robots, which lacks standardized ways of being determined, unlike the forward kinematics problem. With that in mind, here we will show a combined approach of the analytic and numerical way of solving the inverse kinematic problem on a Niryo One robot

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Gaidzhurov, Р. Р., N. А. Saveleva, and V. А. Dyachenkov. "Finite element modeling of the joint action of flow slide and protective structure." Advanced Engineering Research 21, no. 2 (2021): 133–42. http://dx.doi.org/10.23947/2687-1653-2021-21-2-133-142.

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Introduction. In the context of the problem of plane deformation, a finite-element model of a natural landslide slope is developed. It allows for the joint work of a flow slide and a protective engineering structure. The Drucker-Prager model is used to take into account the physical nonlinearity of the slope layer material. To activate the kinematic instability, a viscoelastic interlayer is introduced into the design scheme, along which the landslide layer slides.Materials and Methods. Numerical experiments were performed using the ANSYS Mechanical software package, which implements the finite

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Sanders, R. H. "Spiral structure generated by major planets in protoplanetary disks." Astronomy & Astrophysics 641 (September 2020): A169. http://dx.doi.org/10.1051/0004-6361/202037624.

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In this paper I describe numerical calculations of the motion of particles in a disk about a solar-mass object perturbed by a planet on a circular orbit with mass greater than 0.001 of the stellar mass. A simple algorithm for simulating bulk viscosity is added to the ensemble of particles, and the response of the disk is followed for several planet orbital periods. A two-arm spiral structure forms near the inner resonance (2–1) and extends to the planetary orbit radius (corotation). In the same way for gaseous disks on a galactic scale perturbed by a weak rotating bar-like distortion, this is

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Zhou, Hui, Ping Xu, and Suchao Xie. "Composite energy-absorbing structures combining thin-walled metal and honeycomb structures." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 231, no. 4 (2016): 394–405. http://dx.doi.org/10.1177/0954409716631579.

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The energy-absorbing structure of a crashworthy railway vehicle was designed by combining the characteristics of thin-walled metal structures and aluminum honeycomb structures: finite element models of collisions involving energy-absorbing structures were built in ANSYS/LS-DYNA. In these models, the thin-walled metal structure was modeled as a plastic kinematic hardening material, and the honeycomb structure was modeled as an equivalent solid model with orthotropic–anisotropic mechanical properties. The analysis showed that the safe velocity standard for rail vehicle collisions was improved fr

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Tanabe, Makoto, Hajime Wakui, Masamichi Sogabe, Nobuyuki Matsumoto, Keiichi Gotou, and Yasuko Tanabe. "Computational Model for a High Speed Train Running on the Railway Structure Including Derailment during an Earthquake." Advanced Materials Research 579 (October 2012): 473–82. http://dx.doi.org/10.4028/www.scientific.net/amr.579.473.

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The computational method to solve for the dynamic interaction between a high-speed train and the railway structure including derailment during an earthquake is given. The motion of the train is expressed in multibody dynamics. Efficient mechanical models to express contact-impact behaviors between wheel and the track structure including derailment during an earthquake are given. Rail and track elements with multibody dynamics and FEM combined have been developed. A nonlinear spring element based on a trilinear elastic-plastic material model with the kinematic hardening is given for a concrete

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Bian, S. B., Y. W. Wu, Y. Xu, et al. "On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way." Astronomical Journal 167, no. 6 (2024): 267. http://dx.doi.org/10.3847/1538-3881/ad4030.

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Abstract We report measurements of trigonometric parallax and proper motion for two 6.7 GHz methanol and two 22 GHz water masers located in the far portion of the Sagittarius spiral arm as part of the BeSSeL Survey. Distances for these sources are estimated from parallax measurements combined with three-dimensional kinematic distances. The distances of G033.64−00.22, G035.57−00.03, G041.15−00.20, and G043.89−00.78 are 9.9 ± 0.5, 10.2 ± 0.6, 7.6 ± 0.5, and 7.5 ± 0.3 kpc, respectively. Based on these measurements, we suggest that the Sagittarius arm segment beyond about 8 kpc from the Sun in the

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Squicciarini, Vito, Raffaele Gratton, Mariangela Bonavita, and Dino Mesa. "Unveiling the star formation history of the Upper Scorpius association through its kinematics." Monthly Notices of the Royal Astronomical Society 507, no. 1 (2021): 1381–400. http://dx.doi.org/10.1093/mnras/stab2079.

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ABSTRACT Stellar associations can be discerned as overdensities of sources not only in the physical space but also in the velocity space. The common motion of their members, gradually eroded by the galactic tidal field, is partially reminiscent of the initial kinematic structure. Using recent data from Gaia EDR3, combined with radial velocities from GALAH and APOGEE, we traced back the present positions of stars belonging to Upper Scorpius (USCO), a subgroup of Scorpius–Centaurus, the nearest OB association. About one half of the subgroup (the ‘clustered’ population) appears composed of many s

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Zhou, Caizhi, Youcheng Han, and Weizhong Guo. "Kinematic Chain Equivalent Method for Tube Model and Elastodynamic Optimization for Parallel Mechanism Based on Matrix Structural Analysis." Applied Sciences 12, no. 12 (2022): 6118. http://dx.doi.org/10.3390/app12126118.

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The platforms of parallel mechanisms usually suffer vibration loads. In these cases, structure elastodynamic analysis and elastodynamic optimization of parallel mechanisms are important. A tube structure is very common for parallel mechanisms. This work establishes the model of a tube structure based on matrix structural analysis. The kinematic pair equivalent method is used to simulate the surface contact between the inner and outer tubes. The corresponding mass and stiffness matrices are derived through the strain energy minimization method. The reconfigurable legged lunar lander has been us

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Wang, Meng, Elmar Beeh, Ping Zhou, and Horst E. Friedrich. "Concept design and dynamics analysis of a novel lightweight vehicle suspension combined with driving units." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 4 (2019): 1020–33. http://dx.doi.org/10.1177/0954407019866591.

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A lightweighted suspension concept with integrated driving units into the longitudinal arm is proposed, to meet the increasing requirements from environments on both lightweight and propulsion to electric vehicles. This paper focuses on the structure concept design and ride dynamic analysis of the suspension with combined driving units. Besides conventional springs and shock absorbers, this concept suspension consists of a mass reduced axle structure, longitudinal arms, and electric driving units. The electric driving unit of the concept suspension arm is introduced by structural illustration

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Jiang, Zhihong, Zhijian Yu, and Xiaoyang Zhang. "Research on the inverse kinematic algorithm of the robot arm of the minecart." Journal of Physics: Conference Series 2483, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1742-6596/2483/1/012012.

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Abstract A reverse kinematics solution algorithm for the robot arm of the minecart is proposed based on the structure and motion characteristics of the robot arm, the geometric method is combined with the algebra method, and the trajectory of each joint point on the mechanical arm is calculated inversely by using the motion trajectory of the roller on the mining wheel to reverse-calculate the trajectory of each joint point on the mechanical arm, and the joint angle of the mechanical arm is obtained according to the trajectory of each joint point. The results are compared and analyzed through t

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Kiliclar, Yalin, O. Koray Demir, Ivaylo N. Vladimirov, Lukas Kwiatkowski, Stefanie Reese, and A. Erman Tekkaya. "Simulation of Electromagnetic Forming of a Cross-Shaped Cup by Means of a Viscoplasticity Model Coupled with Damage at Finite Strains." Key Engineering Materials 554-557 (June 2013): 2363–68. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.2363.

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In the field of sheet metal forming traditional forming processes are used. However, a quasi-static forming process combined with a high speed forming process can enhance the forming limits of a single one. In this paper, the investigation of the process chain quasi-static deep drawing – electromagnetic forming by means of a new coupled damage-viscoplasticity model for large deformations is performed. The finite strain constitutive model, used in the finite element simulation combines nonlinear kinematic and isotropic hardening and is derived in a thermodynamically consistent setting. The anis

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Zhao, Da Xu, En Cang Di, Guo Zhong Shou, and Yu Qi Gu. "Kinematics of a 6-DOF Feeding and Unloading Manipulator." Key Engineering Materials 620 (August 2014): 490–95. http://dx.doi.org/10.4028/www.scientific.net/kem.620.490.

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In order to improve the efficiency of kinematics modeling in analyzing robots, this document used Lie groups and screw theory to describe rigid motion of the robot system, established a kinematic model of operating arm based on Product of Exponentials (POE) formula, and analyzed forward and inverse kinematics of chain topology structure robot, as well as several sub-inverse problem of inverse kinematics. A 6-DOF series-wound configuration loading and unloading manipulator has been used as an example, its kinematics equations are established by POE formula combined with screw theory, the specia

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Onodera, Andrea N., Wilson P. Gavião Neto, Maria Isabel Roveri, Wagner R. Oliveira, and Isabel CN Sacco. "Immediate effects of EVA midsole resilience and upper shoe structure on running biomechanics: a machine learning approach." PeerJ 5 (February 28, 2017): e3026. http://dx.doi.org/10.7717/peerj.3026.

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BackgroundResilience of midsole material and the upper structure of the shoe are conceptual characteristics that can interfere in running biomechanics patterns. Artificial intelligence techniques can capture features from the entire waveform, adding new perspective for biomechanical analysis. This study tested the influence of shoe midsole resilience and upper structure on running kinematics and kinetics of non-professional runners by using feature selection, information gain, and artificial neural network analysis.MethodsTwenty-seven experienced male runners (63 ± 44 km/week run) ran in four-

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Chiou, Jiunn-Shyang, Wen-Yi Hung, Yi-Ting Lee, and Zong-Han Young. "Corrigendum to “Combined dynamic structure-pile-soil interaction analysis considering inertial and kinematic effects” [Comput. Geotech. 125 (2020) 103671]." Computers and Geotechnics 154 (February 2023): 105193. http://dx.doi.org/10.1016/j.compgeo.2022.105193.

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Nie, Xichun, and Venkat Krovi. "Fourier Methods for Kinematic Synthesis of Coupled Serial Chain Mechanisms." Journal of Mechanical Design 127, no. 2 (2005): 232–41. http://dx.doi.org/10.1115/1.1829726.

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Single degree-of-freedom coupled serial chain (SDCSC) mechanisms are a class of mechanisms that can be realized by coupling successive joint rotations of a serial chain linkage, by way of gears or cable-pulley drives. Such mechanisms combine the benefits of single degree-of-freedom design and control with the anthropomorphic workspace of serial chains. Our interest is in creating articulated manipulation-assistive aids based on the SDCSC configuration to work passively in cooperation with the human operator or to serve as a low-cost automation solution. However, as single-degree-of-freedom sys

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Borowski, Finja, Robert Ott, Jan Oldenburg, et al. "Validation of a Fluid Structure Interaction Model for TAVR using Particle Image Velocimetry." Current Directions in Biomedical Engineering 8, no. 2 (2022): 512–15. http://dx.doi.org/10.1515/cdbme-2022-1131.

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Abstract The implantation of a transcatheter aortic valve replacement (TAVR) in patients with severe aortic stenosis improves pathologic blood flow through the aortic valve, but still alters hemodynamics in comparison to a healthy native aortic valve. The hemodynamic characteristics of TAVR are associated with hypo-attenuating leaflet thickening and prosthetic leaflet thrombosis, which may reduce the durability of TAVR. For this reason we developed a numerical model to identify pro-thrombotic regions of TAVR based on the velocity field. In silico models have already been proven to be an effect

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