Relevant bibliographies by topics / Predetermined motion time systems

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Predetermined motion time systems'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Predetermined motion time systems"

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Genaidy, A. M., A. Agrawal, and A. Mital. "Computerized predetermined motion-time systems in manufacturing industries." Computers & Industrial Engineering 18, no. 4 (January 1990): 571–84. http://dx.doi.org/10.1016/0360-8352(90)90016-f.

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Alkan, Bugra, Daniel Vera, Mussawar Ahmad, Bilal Ahmad, and Robert Harrison. "A Model for Complexity Assessment in Manual Assembly Operations Through Predetermined Motion Time Systems." Procedia CIRP 44 (2016): 429–34. http://dx.doi.org/10.1016/j.procir.2016.02.111.

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Genaidy, A. M., A. Mital, and M. Obeidat. "The validity of predetermined motion time systems in setting production standards for industrial tasks." International Journal of Industrial Ergonomics 3, no. 3 (April 1989): 249–63. http://dx.doi.org/10.1016/0169-8141(89)90025-5.

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Laurig, W., F. M. Kühn, and K. C. Schoo. "An approach to assessing motor workload in assembly tasks by the use of predetermined-motion-time systems." Applied Ergonomics 16, no. 2 (June 1985): 119–25. http://dx.doi.org/10.1016/0003-6870(85)90214-5.

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Cai, Kaijun, Weiming Zhang, Wenzhuo Chen, and Hongfei Zhao. "A study on product assembly and disassembly time prediction methodology based on virtual maintenance." Assembly Automation 39, no. 4 (September 2, 2019): 566–80. http://dx.doi.org/10.1108/aa-12-2017-177.

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Purpose Based on virtual maintenance, this paper aims to propose a time prediction method of assembly and disassembly (A&D) actions of product maintenance process to enhance existing methods’ prediction accuracy, applicability and efficiency. Design/methodology/approach First, a framework of A&D time prediction model is constructed, which describes the time prediction process in detail. Then, basic maintenance motions which can comprise a whole A&D process are classified into five categories: body movement, working posture change, upper limb movement, operation and grasp/placement. A standard posture library is developed based on the classification. Next, according to motion characteristics, different time prediction methods for each motion category are proposed based on virtual maintenance simulation, modular arrangement of predetermined time standard theory and the statistics acquired from motion experiment. Finally, time correction based on the quantitative evaluation method of motion time influence factors is studied so that A&D time could be predicted with more accuracy. Findings Case study of time prediction of products’ various A&D processes is conducted by implementing the proposed method. The prediction process of diesel cooling fan disassemble time is presented in detail. Through comparison, the advantages and effectiveness of the method are demonstrated. Originality/value This paper proposes a more accurate, efficient and applicable product A&D time prediction method. It can help designers predict A&D time of a product maintenance accurately in early design phases without a physical prototype. It can also provide basis for the verification of maintainability, the balance of the design of product structure and system layout.
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Xu, Qinhuan, and Qiang Zhan. "A real-time inverse kinematics solution based on joint perturbation for redundant manipulators." Mechanical Sciences 12, no. 1 (February 25, 2021): 221–35. http://dx.doi.org/10.5194/ms-12-221-2021.

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Abstract. Aiming at the problem that the calculation of the inverse kinematics solution of redundant manipulators is very time-consuming, this paper presents a real-time method based on joint perturbation and joint motion priority. The method first seeks the pose nearest to the target pose in the manipulator's pose set through fine-tuning all the joints with different angle deviations at the same time and then regards this pose as the starting one to perform iterative calculations until the error between the current pose and the target pose is less than the predetermined error, thus obtaining the inverse kinematics solution corresponding to the target pose. This method can avoid the pseudo-inverse calculations of the Jacobian matrix and significantly reduce the solving complexity. Two types of manipulators are taken as examples to validate the proposed method. Under the premise that the manipulator motion trajectory is satisfied, the Jacobian pseudo-inverse method and the proposed method are both adopted to solve the inverse kinematics. Simulations and comparisons show that the proposed method has better real-time performance, and the joint motions can be flexibly controlled by setting different joint motion priorities. This method can make the work cycle faster and improve the production efficiency of redundant manipulators in real applications.
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Atalay, İsmail, Oğuz Alper İsen, Emin Cantez, Serkan Aydın, and Onur Akyel. "Integrated Real Time Image Processing In Robotic Automation Line." Academic Perspective Procedia 3, no. 1 (October 25, 2020): 141–50. http://dx.doi.org/10.33793/acperpro.03.01.33.

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Robotic automation systems includes higher production rates and increased productivity, more efficient use of materials, better product quality, improved safety, and reduced factory lead times. Higher output and increased productivity have been two of the biggest reasons in justifying the use of automation. Despite the claims of high quality from good workmanship by humans, automated systems typically perform the manufacturing process with less variability than human workers, resulting in greater control and consistency of product quality. Also, increased process control makes more efficient use of materials, resulting in less scrap. Despite all these advantages, the final product control is still carried out by workers. In this study, it is planned to prevent quality problems with a video processing that integrates with the robotic automation line in order to solve the final quality problem. This system, which controls the movements of the worker in the predetermined motion routes with the signals coming from the line. It aims to ensure that the products going to the customer are completely error free.
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Chegini, Somayeh, and Majid Yarahmadi. "Quantum sliding mode control via error sliding surface." Journal of Vibration and Control 24, no. 22 (January 15, 2018): 5345–52. http://dx.doi.org/10.1177/1077546317752848.

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In this paper, a new quantum sliding mode control, for improving the performance of the two-level quantum sliding mode control systems with bounded uncertainties, is introduced. The presented quantum sliding surface is based on the error which occurs between the predetermined sliding mode and the system state. The control objective is to derive the system state to reach the sliding mode domain and then maintain its motion on it. For this purpose, we use the sliding mode control method and periodic projective measurements. A theorem for facilitating the presented method is proved. The simulated example shows that both the reaching time to the sliding mode and the control amplitude are significantly decreased, which demonstrate the effectiveness and validity of the presented method.
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Negied, Nermin Kamal Abdel-Wahab, Elsayed B. Hemayed, and Magda Fayek. "HSBS: A Human’s Heat Signature and Background Subtraction Hybrid Approach for Crowd Counting and Analysis." International Journal of Pattern Recognition and Artificial Intelligence 30, no. 08 (July 17, 2016): 1655025. http://dx.doi.org/10.1142/s0218001416550259.

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This work presents a new approach for crowd counting and classification based upon human thermal and motion features. The technique is efficient for automatic crowd density estimation and type of motion determination. Crowd density is measured without any need for camera calibration or assumption of prior knowledge about the input videos. It does not need any human intervention so it can be used successfully in a fully automated crowd control systems. Two new features are introduced for crowd counting purpose: the first represents thermal characteristics of humans and is expressed by the ratio between their temperature and their ambient environment temperature. The second describes humans motion characteristics and is measured by the ratio between humans motion velocity and the ambient environment rigidity. Each ratio should exceed a certain predetermined threshold for human beings. These features have been investigated and proved to give accurate crowd counting performance in real time. Moreover, the two features are combined and used together for crowd classification into one of the three main types, which are: fully mobile, fully static, or mix of both types. Last but not least, the proposed system offers several advantages such as being a privacy preserving crowd counting system, reliable for homogeneous and inhomogeneous crowds, does not depend on a certain direction in motion detection, has no restriction on crowd size. The experimental results demonstrate the effectiveness of the approach.
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Zhang, Ping, Peigen Jin, Guanglong Du, and Xin Liu. "Ensuring safety in human-robot coexisting environment based on two-level protection." Industrial Robot: An International Journal 43, no. 3 (May 16, 2016): 264–73. http://dx.doi.org/10.1108/ir-12-2015-0222.

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Purpose The purpose of this paper is to provide a novel methodology based on two-level protection for ensuring safety of the moving human who enters the robot’s workspace, which is significant for dealing with the problem of human security in a human-robot coexisting environment. Design/methodology/approach In this system, anyone who enters the robot’s working space is detected by using the Kinect and their skeletons are calculated by the interval Kalman filter in real time. The first-level protection is mainly based on the prediction of the human motion, which used Gaussian mixture model and Gaussian Mixture Regression. However, even in cases where the prediction of human motion is incorrect, the system can still safeguard the human by enlarging the initial bounding volume of the human as the second-level early warning areas. Finally, an artificial potential field with some additional avoidance strategies is used to plan a path for a robot manipulator. Findings Experimental studies on the GOOGOL GRB3016 robot show that the robot manipulator can accomplish the predetermined tasks by circumventing the human, and the human does not feel dangerous. Originality/value This study presented a new framework for ensuring human security in a human-robot coexisting environment, and thus can improve the reliability of human-robot cooperation.
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Dissertations / Theses on the topic "Predetermined motion time systems"

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Dalianis, Sotirios A. "Time-frequency methods for nonstationary systems." Thesis, University of Southampton, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246198.

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Smeds, Kristofer S. "High-performance real-time motion control for precision systems." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/34020.

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Digital motion controllers are used almost exclusively in automated motion control systems today. Their key performance parameters are controller execution speed, timing consistency, and data accuracy. Most commercially available controllers can achieve sampling rates up to 20kHz with several microseconds of timing variation between control cycles. A few state-of-the art control platforms can reach sampling rates of around 100kHz with several hundred nanoseconds of timing variation. There exist a growing number of emerging high-speed high-precision applications, such as diamond turning and scanning probe microscopy, that can benefit from digital controllers capable of faster sampling rates, more consistent timing, and higher data accuracy. This thesis presents two areas of research intended to increase the capabilities of digital motion controllers to meet the needs of these high-speed high-precision applications. First, it presents a new high-performance real-time multiprocessor control platform capable of 1MHz control sampling rates with less than 6ns RMS control cycle timing variation and 16-bit data acquisition accuracy. This platform also includes software libraries to integrate it with Simulink for rapid controller development and LabVIEW for easy graphical user interface development. This thesis covers the design of the control platform and experimentally demonstrates it as a motion controller for a fast-tool servo machine tool. Second, this thesis investigates the effect of control cycle timing variations (sampling jitter and control jitter) on control performance, with an emphasis on precision positioning degradation. A new approximate discrete model is developed to capture the effects of jitter, enabling an intuitive understanding of it's effects on the control system. Based on this model, analyses are carried out to determine the relationship between jitter and positioning error for two scenarios: regulation error from jitter's interaction with measurement noise; and tracking error from jitter's interaction with a deterministic reference command. Further, several practical methods to mitigate the positioning degradation due to jitter are discussed, including a new jitter compensator that can be easily added to an existing controller. Through simulations and experiments performed on a fast-tool servo machine tool, the model and analyses are validated and the positioning degradation arising from jitter is clearly demonstrated.
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Mawla, Ayad Abdul. "Real Time Intruder Detection Systems (RAIDS)." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261669.

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Lu, Yueyun. "Switching Stabilization of Continuous-Time Switched Systems." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1479201964449478.

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Björkman, Mårten. "Real-Time Motion and Stereo Cues for Active Visual Observers." Doctoral thesis, KTH, Numerical Analysis and Computer Science, NADA, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3382.

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Yang, Xianyi. "Neural network approaches to real-time motion planning and control of robotic systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0020/NQ46951.pdf.

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Mawla, Aya Abdul. "Real time automatic intruder detection system (RAIDS)." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.319332.

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Belkind, Ori. "Physical systems : conceptual pathways between spacetime and matter /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/5703.

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Patton, Michael Winston Jr. "DEVELOPING A TIME AND MOTION STUDY FOR A LEAN HEALTHCARE ENVIRONMENT." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_theses/163.

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This thesis outlines the development of a standard methodology for performing a time and motion study in a lean healthcare environment. Time and motion studies have been used in healthcare environments in the past, however they have nearly all been exclusive to a particular healthcare enterprise. To develop the time and motion study methodology, a study was designed to examine how resident doctors spend their time. This study was performed in response to coming changes in the work hours for all residents. Once the methodology was developed, trial observations were conducted. The data from these observations was analyzed to determine the effectiveness of both the time and motion study methodology and its usefulness for process improvement activities.
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Deo, Vishwadeep. "Real-Time Adaptive Systems for Building Envelopes." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19769.

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The thesis attempts to investigate the issues pertaining to design, fabrication and application of real-time adaptive systems for building envelopes, and to answer questions raised by the idea of motion in architecture. The thesis uses the Solar Decathlon Competition as a platform to base all the research and consequently to verify their applications. Photo-voltaic (PV) panels and shading devices are two different components of Georgia Institute of Technology s the Solar Decathlon House, located above the roof, that are based on the concept of Homeostasis or self-regulated optimization. For the PV panels, the objective is to optimize energy production, by controlling their movement to track the changing position of Sun, whereas, the objective for the shading devices is to reduce heating or cooling loads by controlling the position of shading devices, thus controlling direct and diffused heat gains through the roof. To achieve this adaptive feature, it required three layers of operations. First was the design of the mechanics of movement, which tried to achieve the required motion for the PV panels and shading devices by using minimum components and parameters. Second was the design of the individual parts that are consistent with the overall concept of the House. And finally, the third layer is the design of controls that automates the motion of the PV panels and Shading Devices, using a set of sensors that actuate the attached motors. As a final product, there is an attempt to integrate the precision and material efficiency of digital fabrication with the self-regulated optimization of the roof components.
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Books on the topic "Predetermined motion time systems"

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Fichtner, Peter. Systeme vorbestimmter Zeiten und ihre Einführung in der BRD. Hannover: Projekt Arbeiterbewegung in Hannover, 1986.

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Ebeling, Robert M. Accuracy of response of single-degree-of-freedom systems to ground motion. Vicksburg, Miss: U.S. Army Engineer Waterways Experiment Station, 1997.

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Schaeren, Peter. Real-time 3-D scene acquisition by monocular motion induced stero. Konstanz: Hartung-Gorre, 1994.

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service), SpringerLink (Online, ed. Physical Systems: Conceptual Pathways between Flat Space-time and Matter. Dordrecht: Springer Science+Business Media B.V., 2012.

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G, Pucacco, ed. Theory of orbits. 3rd ed. Berlin: Springer, 2004.

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Boccaletti, D. Theory of orbits. 2nd ed. Berlin: Springer, 2001.

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Boccaletti, D. Theory of orbits. Berlin: Springer-Verlag, 1996.

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Asari, Vijayan K. Wide Area Surveillance: Real-time Motion Detection Systems. Springer, 2016.

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Nolte, David D. Introduction to Modern Dynamics: Chaos, Networks, Space, and Time. Oxford University Press, 2019.

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Nolte, David D. Introduction to Modern Dynamics: Chaos, Networks, Space, and Time. Oxford University Press, 2019.

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Book chapters on the topic "Predetermined motion time systems"

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León-Duarte, Jaime, Luis Aguilar-Yocupicio, and Luis Romero-Dessens. "A Software Tool for the Calculation of Time Standards by Means of Predetermined Motion Time Systems and Motion Sensing Technology." In Human Systems Engineering and Design, 1088–93. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02053-8_166.

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Wang, Yulun, Amante Mangaser, Steve Jordan, Partha Srinivasan, and Steven Butner. "The 3DP Real-Time Motion-Control Computer." In Expert Systems and Robotics, 341–53. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-76465-3_19.

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Wang, Weifu, and Devin Balkcom. "Time-Optimal Motion of Spatial Dubins Systems." In Springer Proceedings in Advanced Robotics, 529–44. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44051-0_31.

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Kulbacki, Marek, and Artur Bak. "Unsupervised Learning Motion Models Using Dynamic Time Warping." In Intelligent Information Systems 2002, 217–26. Heidelberg: Physica-Verlag HD, 2002. http://dx.doi.org/10.1007/978-3-7908-1777-5_23.

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Müller, Steffen, Thanh Q. Trinh, and Horst-Michael Gross. "Local Real-Time Motion Planning Using Evolutionary Optimization." In Towards Autonomous Robotic Systems, 211–21. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64107-2_17.

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Liegeois, Alain, and Christophe Moignard. "Minimum-Time Motion Planner for Mobile Robots on Uneven Terrains." In Robotic Systems, 271–78. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2526-0_31.

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Li, Zhihua, and Zongjian He. "Real-time Motion Detection in Dynamic Scenes." In Emerging Technologies for Information Systems, Computing, and Management, 879–88. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-7010-6_98.

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Lorenz, Hans-Walter. "Complex Transient Motion in Continuous-Time Economic Models." In Nonlinear Evolution of Spatial Economic Systems, 112–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-642-78463-7_5.

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Qiu, Hanzhao, Weining Fang, Li Wang, Bo Wang, and Beiyuan Guo. "Motion and Time Study on Space Maintenance Mission." In Advances in Intelligent Systems and Computing, 128–38. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-60441-1_13.

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Song, Youlian, and Robin M. C. Keyser. "Design of Manipulator Trajectories with Minimum Motion Time and Specified Accuracy." In Robotic Systems, 159–66. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2526-0_19.

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Conference papers on the topic "Predetermined motion time systems"

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Assadi, Armand D., and James H. Oliver. "Real-Time Particle Simulation for Virtual Environments." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/dfm-4422.

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Abstract A real-time interactive environment for particle simulation is presented with specific attention given to fluid flow from a fountain system. The complex Navier-Stokes equations from fluid dynamics theory give way to simple dynamic equations of motion for systems of independent particles from particle theory. Due to the ease of integration of the dynamic linear first order differential equations, compared to the nonlinear second order partial differential equations of Navier-Stokes, a real-time rate was achieved for a visually aesthetic model of fluid flow. The primary contribution is that interactive changes made by the user are perceived to occur simultaneously in the environment. There is no need to resolve a predetermined set of equations when making the changes.
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Deng, Yanfei, Jianmin Yang, and Longfei Xiao. "Influence of Wave Group Characteristics on the Motion of a Semisubmersible in Freak Waves." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23589.

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In the last few decades, the hydrodynamic performance of offshore structures has been widely studied to ensure their safety as well as to achieve an economical design. However, an increasing number of reported accidents due to rough ocean waves call for in-depth investigations on the loads and motions of offshore structures, particularly the effect of freak waves. The aim of this paper is to determine the sea conditions that may cause the maximum motion responses of offshore structures, which have a significant effect on the loads of mooring systems because of their tight relationship. As a preliminary step, the response amplitude operators (RAOs) of a semisubmersible platform of 500 meters operating depth are obtained with the frequency-domain analysis method. Subsequently, a series of predetermined extreme wave sequences with different wave group characteristics, such as the maximum crest amplitude and the time lag between successive high waves, are adopted to calculate the hydrodynamic performance of the semisubmersible with mooring systems in time-domain. The paper shows that the maximum motion responses not only depend on the largest wave crest amplitude but also the time lags between successive giant waves. This paper will provide an important reference for future designs which could consider the most dangerous wave environment.
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Jokinen, Anton, Olof Calonius, Matti Pietola, and Jagan Gorle. "Effects of Oil Contamination Level, Flow Rate and Viscosity on Pressure Drop Development and Dirt Holding Capacity of Hydraulic Filter." In ASME/BATH 2019 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/fpmc2019-1631.

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Abstract In hydraulic systems, the presence of foreign material in the system oil accounts for the majority of system troubles due to mechanical wear of components, sticking of different parts etc. Therefore, it is essential to maintain an adequate cleanliness level of the fluid at all times through filtration. Mechanical filters are used for this purpose, to separate solid particles from the system oil. As a hydraulic filter gets accumulated with dirt throughout its service life, the pressure drop over the filter element increases. This pressure drop is typically used for determining the lifetime of a filter element: once a predetermined pressure drop at certain flow conditions has been reached, the filter has accumulated enough dirt to require servicing or replacement. In this paper, a correlation model has been developed to describe the effects of flow and fluid properties on the dirt holding capacity and the service life duration of a hydraulic filter. For this purpose, extensive laboratory tests have been carried out in order to measure the pressure drop development of a filter unit at different oil flow rates, viscosities and gravimetric contamination levels. The work in this paper has been done as part of the initial research for investigating the effects of different flow and fluid parameters on hydraulic filtration. The aim of the overall research project is to develop an IoT-enabled smart filter unit that could predict its remaining lifetime, and estimate the condition of the system oil as well.
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Martori, Amanda L., Stephanie L. Carey, Redwan Alqasemi, Daniel Ashley, and Rajiv V. Dubey. "Characterizing Suitability of Wearable Sensors for Movement Analysis Using a Programmed Robotic Motion." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65064.

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Wearable sensor systems have the potential to offer advancements in the study of motion disorders, particularly outside of a laboratory setting during activities of daily living or on a football field. Advantages like portability and the capability to gather real-world data have resulted in the rapid adoption of these sensors in various studies for gait analysis, balance control evaluation, physical activity recognition and fall prevention. However, before using wearable sensors in long-term acquisition studies, it is necessary to quantify and analyze errors and determine their sources. In this study, the accuracy of joint angles and velocities measured with the wearable inertial measurement unit (IMU) sensors were compared to both measurements from an optical motion-tracking system and from encoders on a robotic arm while it completed various predetermined paths. The robotic arm uses incremental encoders at each joint to measure and calculate its Cartesian motion relative to a reference frame using inverse kinematics. Motion profiles of the robotic arm were tracked using the onboard encoders, an eight-camera Vicon (Oxford, UK) motion-tracking system with passive retro-reflective markers, and four wearable IMUs by APDM (Portland, OR). In order to better isolate various types of contributing errors, linear, planar, and 3-dimensional robot motions were used. Data were collected from the sensors over several hours, which provided insight into time-based effects as well as management of large amounts of data for future long-term tracking applications. In addition, the authors have previously seen acquisition errors with high-speed gaits, thus robotic arm trajectories of varying velocities were used to provide further insight into these rate-based effects. Angular velocity and joint angles were compared for all three systems and used to investigate the hysteresis, drift and time-based effects on the IMUs as well as their accuracy during motion tracking. Effects on IMU performance due to the application of filtering algorithms were not investigated. The results show that the IMUs were able to calculate the joint angles within a clinically acceptable range of the gold standard optical motion-tracking system. The IMUs also provided accurate trajectory recognition and angular velocity measurements relative to the known motion input of the robotic arm. Future work will include the development of algorithms to detect gait abnormalities such as those seen in patients with mild traumatic brain injury (mTBI). To complement human subject testing with gait pathology, controlled introduction of gait deviations into this robotic testing framework will allow for well-characterized unit testing, providing more robust algorithm development.
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Balkan, Tuna, and Bilgin Kaftanoglu. "Design of Cartesian Trajectories and Model Based Control for Robotic Manipulators." In ASME 1990 Design Technical Conferences. American Society of Mechanical Engineers, 1990. http://dx.doi.org/10.1115/detc1990-0095.

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Abstract In this study, design and calculation of Cartesian trajectories for robotic manipulators are discussed with a model-based control system at the joint level. The synthetic generation of the continuous path is described and from a predetermined velocity profile and evaluated path length, the time frame of the motion is computed. In the definition of end-effector orientations, instead of using impractical Euler angles, a practical method suitable to industrial applications is given. The trajectory generation and control algorithms are applied to a computer model of a PUMA type manipulator following a three dimensional path. Open-loop joint variable torques are plotted for the given scenerio. Joint variable position and velocity errors are discussed when certain simplifications are performed on the control law for on-line control of manipulators.
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Mahmood, Faisal, and Marwan Hassan. "Modeling of Fluidelastic Instability Forces in Fully Flexible Tube Arrays." In ASME 2007 Pressure Vessels and Piping Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/pvp2007-26653.

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Fluidelastic instability remains the most devastating phenomenon in tube bundles subjected to cross-flow. Models have been developed to estimate the threshold of instability. Moreover, several time-domain models of fluidelastic instability have been developed to determine tube/support interaction parameters of tubes with loose supports. The present work deals with time domain modeling of fluid-elastic instability forces in a fully flexible tube array subjected to cross-flow. The model is based on the flow redistribution theory proposed initially by Lever and Weaver [1]. The proposed model utilizes fewer input parameters and can model various tube bundle geometries with any pitch-to-diameter ratio. Finite element method is used for solving the system response. The flow field inside the tube array is discretized into flow subdomains, each of which is surrounded by 4 tubes. The perturbation in the flow field, within each subdomain, is obtained by superimposing the effects of neighboring tube motions. The model has been applied to assess the response of a single flexible tube as well as multiple flexible tubes. It is shown that the single flexible model overestimates the stability threshold compared to the multiple flexible tube counterpart, especially at high mass-damping parameters. The results show a good agreement between the predicted and the experimental results. The proposed model does not assume any predetermined tube response or any tube motion pattern.
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Heisler, Aaron S., John J. Moskwa, and Frank J. Fronczak. "Simulated Helical Gear Pump Analysis Using a New CFD Approach." In ASME 2009 Fluids Engineering Division Summer Meeting. ASMEDC, 2009. http://dx.doi.org/10.1115/fedsm2009-78472.

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The purpose of this paper is to focus on cavitation prediction at high-speeds in helical gear pumps for the purpose of hydrostatic dynamometer system development. Details of the fluid motion will be described through various stages of fluid transfer from the pump inlet to the outlet using various mesh densities. Using the results of these simulations, a discussion of design improvements for high-speed hydrostatic dynamometer operation is included. Conducting CFD simulations on external gear pumps is a difficult problem depending upon the complexity of the individual components. Simulating helical gears is especially taxing due to the complexity of the gear tooth profile. The additional detail in a helical gear pump model leads to an increase of the required mesh density and therefore increased computation time. A less computationally complex approach to simulating helical gears is to consider a helical gear as a series of thin spur gears rotated according to a predetermined helix angle. Details of this approach and results are discussed in this paper.
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Reno, Matthew J., and Robert J. Broderick. "Predetermined time-step solver for rapid quasi-static time series (QSTS) of distribution systems." In 2017 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT). IEEE, 2017. http://dx.doi.org/10.1109/isgt.2017.8086045.

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9

Bures, M., and P. Pivodova. "Comparison of the predetermined time systems MTM-1 and BasicMOST in assembly production." In 2013 IEEE International Conference on Industrial Engineering and Engineering Management (IEEM). IEEE, 2013. http://dx.doi.org/10.1109/ieem.2013.6962471.

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Gastaldi, Chiara, and Muzio M. Gola. "A Random Sampling Strategy for Tuning Contact Parameters of Underplatform Dampers." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42834.

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All numerical models of friction damped bladed arrays require knowledge of contact-friction parameters, which are established either through direct frictional measurements, done with the help of a separate single contact test arrangement, or by fine tuning the parameters in the numerical model of the real damping device and comparing the experimental response of a damped blade against its computed response. Recent results from direct measurements on underplatform dampers and the subsequent cross-comparison of experimental and numerical results have put into evidence several features which are usually neglected in FE models of damper-blade systems: – markedly different friction coefficients at different contact points; – friction coefficients evolving with time and cycle number towards a stable shape, in a systematic and repeatable manner with dramatic consequences on the shape of the hysteresis cycle and on dissipated energy; – particular cases where minimal variations in the friction coefficients lead to gross changes of the damper behavior; Identifying the contact parameters to assure the best match between model and experimental results becomes crucial to guarantee that the validated damper model will produce the correct cyclic forces on the blades during vibrational motion. While the tuning process described in the previous papers was a search based on the progressive refinement whose results depended on the operator’s ability to match different patterns of the model and experimental results, this paper dwells on a more objective and controllable method based on properly chosen indicators. The latter method is based on a sampling technique (Latin Hyper-cube) which produces a large number of solutions (in the present case 5000) on the basis of randomized extractions of contact parameters (in the present case 5) between given boundaries. An advantage of this method is a systematic exploration of the influence of each input contact parameter on the collection of output indicators, considered acceptable according to predetermined criteria. The main indicators suited for the purpose are three, i.e., the relative errors on the real and imaginary parts of the HBM complex spring equivalent to the hysteresis cycle and a measure of shape similarity between the experimental and simulated cycle. The paper shows the selection procedure which has been adopted to produce the final set of eligible solutions, which are further reduced by applying a secondary indicator based on the similarity of a kinematical parameter. In this paper this parameter is chosen to be a measure of the shape similarity of the damper rotation during the hysteresis cycle.
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Reports on the topic "Predetermined motion time systems"

1

Biagi, C., J. Vetromile, and B. Teheranian. Time and motion study for alternative mixed low-level waste treatment systems. Office of Scientific and Technical Information (OSTI), February 1997. http://dx.doi.org/10.2172/481876.

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