Download or read book Parallel Robots With Unconventional Joints written by Patrick Grosch and published by Springer. This book was released on 2019-03-20 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book shows how, through certain geometric transformations, some of the standard joints used in parallel robots can be replaced with lockable or non-holonomic joints. These substitutions allow for reducing the number of legs, and hence the number of actuators needed to control the robot, without losing the robot's ability to bring its mobile platform to the desired configuration. The kinematics of the most representative examples of these new designs are analyzed and their theoretical features verified through simulations and practical implementations.
Download or read book Parallel Robots with Unconventional Joints to Achieve Under actuation and Reconfigurability written by Patrick Grosch and published by . This book was released on 2016 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of the thesis is to define, analyze, and verify through simulations and practical implementations, parallel robots with unconventional joints that allow them to be under-actuated and/or reconfigurable. The new designs will be derived from the: * 6SPS robot (alternatively 6UPS or 6SPU, depending on the implementation) when considering the spatial case (i.e., robots with 3 degrees of freedom of rotation and 3 degrees of freedom of translation). * S-3SPS robot (alternatively S-3UPS or S-3SPU, depending on the implementation) when considering spherical robots (i.e., robots with 3 degrees of freedom of rotation). In both cases, we will see how, through certain geometric transformations, some of the standard joints can be replaced by lockable or non-holonomic joints. These substitutions permit reducing the number of legs (and hence the number of actuators needed to control the robot), without losing the robot's ability to bring its mobile platform to any position and orientation (in case of a spatial robot), or to any orientation (in case of a spherical robot), within its workspace. The expected benefit of these new designs is to obtain parallel robots with: * larger working spaces because the possibility of collisions between legs is reduced, and the number of joints (with their intrinsic range limitations) is also reduced; * lower weight because the number of actuators and joints is reduced; and * lower cost because the number of actuators and controllers is also reduced. The elimination of an actuator and the introduction of a motion constraint reduces in one the dimension of the space of allowed velocities attainable from a given configuration. As a result, it will be necessary, in general, to plan maneuvers to reach the desired configuration for the moving platform. Therefore, the obtained robots will only be suitable for applications where accuracy is required in the final position and a certain margin of error is acceptable in the generated trajectories.
Download or read book Parallel Robots written by J.-P. Merlet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parallel robots are closed-loop mechanisms presenting very good performances in terms of accuracy, rigidity and ability to manipulate large loads. Parallel robots have been used in a large number of applications ranging from astronomy to flight simulators and are becoming increasingly popular in the field of machine-tool industry. This book presents a complete synthesis of the latest results on the possible mechanical architectures, analysis and synthesis of this type of mechanism. It is intended to be used by students (with over 100 exercises and numerous Internet addresses), researchers (with over 500 references and anonymous ftp access to the code of some algorithms presented in this book) and engineers (for which practical results and applications are presented).
Download or read book Dynamics of Parallel Robots written by Sébastien Briot and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book starts with a short recapitulation on basic concepts, common to any types of robots (serial, tree structure, parallel, etc.), that are also necessary for computation of the dynamic models of parallel robots. Then, as dynamics requires the use of geometry and kinematics, the general equations of geometric and kinematic models of parallel robots are given. After, it is explained that parallel robot dynamic models can be obtained by decomposing the real robot into two virtual systems: a tree-structure robot (equivalent to the robot legs for which all joints would be actuated) plus a free body corresponding to the platform. Thus, the dynamics of rigid tree-structure robots is analyzed and algorithms to obtain their dynamic models in the most compact form are given. The dynamic model of the real rigid parallel robot is obtained by closing the loops through the use of the Lagrange multipliers. The problem of the dynamic model degeneracy near singularities is treated and optimal trajectory planning for crossing singularities is proposed. Lastly, the approach is extended to flexible parallel robots and the algorithms for computing their symbolic model in the most compact form are given. All theoretical developments are validated through experiments.
Download or read book Parallel Robotic Machine Tools written by Dan Zhang and published by Springer Science & Business Media. This book was released on 2009-12-01 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research and development of various parallel mechanism applications in engineering are now being performed more and more actively in every industrial field. Parallel robot based machine tools development is considered a key technology of robot applications in manufacturing industries. The material covered here describes the basic theory, approaches, and algorithms in the field of parallel robot based machine tools. In addition families of new alternative mechanical architectures which can be used for machine tools with parallel architecture are introduced. Given equal importance is the design of mechanism systems such as kinematic analysis, stiffness analysis, kinetostatic modeling, and optimization.
Download or read book Structural Synthesis of Parallel Robots written by Grigore Gogu and published by Springer Science & Business Media. This book was released on 2009-02-15 with total page 774 pages. Available in PDF, EPUB and Kindle. Book excerpt: “The mathematical investigations referred to bring the whole apparatus of a great science to the examination of the properties of a given mechanism, and have accumulated in this direction rich material, of enduring and increasing value. What is left unexamined is however the other, immensely deeper part of the problem, the question: How did the mechanism, or the elements of which it is composed, originate? What laws govern its building up? Is it indeed formed according to any laws whatever? Or have we simply to accept as data what invention gives us, the analysis of what is thus obtained being the only scientific problem left – as in the case of natural history?” Reuleaux, F., Theoretische Kinematik, Braunschweig: Vieweg, 1875 Reuleaux, F., The Kinematics of Machinery, London: Macmillan, 1876 and New York: Dover, 1963 (translated by A.B.W. Kennedy) This book represents the second part of a larger work dedicated to the structural synthesis of parallel robots. Part 1 already published in 2008 (Gogu 2008a) has presented the methodology proposed for structural synthesis. This book focuses on various topologies of translational parallel robots systematically generated by using the structural synthesis approach proposed in Part 1. The originality of this work resides in the fact that it combines the new formulae for mobility connectivity, redundancy and overconstraints, and the evolutionary morphology in a unified approach of structural synthesis giving interesting innovative solutions for parallel mechanisms.
Download or read book Structural Synthesis of Parallel Robots written by Grigore Gogu and published by Springer Science & Business Media. This book was released on 2013-09-24 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents the fifth part of a larger work dedicated to the structural synthesis of parallel robots. The originality of this work resides in the fact that it combines new formulae for mobility, connectivity, redundancy and overconstraints with evolutionary morphology in a unified structural synthesis approach that yields interesting and innovative solutions for parallel robotic manipulators. This is the first book on robotics that presents solutions for coupled, decoupled, uncoupled, fully-isotropic and maximally regular robotic manipulators with Schönflies motions systematically generated by using the structural synthesis approach proposed in Part 1. Overconstrained non-redundant/overactuated/redundantly actuated solutions with simple/complex limbs are proposed. Many solutions are presented here for the first time in the literature. The author had to make a difficult and challenging choice between protecting these solutions through patents and releasing them directly into the public domain. The second option was adopted by publishing them in various recent scientific publications and above all in this book. In this way, the author hopes to contribute to a rapid and widespread implementation of these solutions in future industrial products.
Download or read book Design Analysis and Control of Cable Suspended Parallel Robots and Its Applications written by Bin Zi and published by Springer. This book was released on 2017-02-18 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an essential overview of the authors’ work in the field of cable-suspended parallel robots, focusing on innovative design, mechanics, control, development and applications. It presents and analyzes several typical mechanical architectures of cable-suspended parallel robots in practical applications, including the feed cable-suspended structure for super antennae, hybrid-driven-based cable-suspended parallel robots, and cooperative cable parallel manipulators for multiple mobile cranes. It also addresses the fundamental mechanics of cable-suspended parallel robots on the basis of their typical applications, including the kinematics, dynamics and trajectory tracking control of the feed cable-suspended structure for super antennae. In addition it proposes a novel hybrid-driven-based cable-suspended parallel robot that uses integrated mechanism design methods to improve the performance of traditional cable-suspended parallel robots. A comparative study on error and performance indices of hybrid-driven based and traditional cable-suspended parallel robots rounds out the coverage. This book addresses the needs of researchers, engineers and post-graduates in the field of cable-suspended parallel robots and related areas.
Download or read book Structural Synthesis of Parallel Robots written by Grigore Gogu and published by Springer Science & Business Media. This book was released on 2010-09-08 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: “In other words, the invention of a mechanism will be to the scientific kinematist a synthetic problem, - which he can solve by the use of systematic, if also difficult, methods.” Reuleaux, F., Theoretische Kinematik, Braunschweig: Vieweg, 1875 Reuleaux, F., The Kinematics of Machinery, London: Macmillan, 1876 and New York: Dover, 1963 (translated by A.B.W. Kennedy) This book represents the third part of a larger work dedicated to the structural synthesis of parallel robots. Part 1 (Gogu 2008a) presented the methodology of structural synthesis and the systematisation of structural solutions of simple and complex limbs with two to six degrees of connectivity systematically generated by the structural synthesis approach. Part 2 (Gogu 2009a) presented structural solutions of translational parallel robotic manipulators with two and three degrees of mobility. This book focuses on various topologies of parallel robotic manipulators with planar motion of the moving platform systematically generated by using the structural synthesis approach proposed in Part 1. The originality of this work resides in the fact that it combines the new formulae for mobility connectivity, redundancy and overconstraints, and the evolutionary morphology in a unified approach of structural synthesis giving interesting innovative solutions for parallel mechanisms.
Download or read book Cable Driven Parallel Robots written by Andreas Pott and published by Springer. This book was released on 2014-08-14 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents the outcome of the second forum to cable-driven parallel robots, bringing the cable robot community together. It shows the new ideas of the active researchers developing cable-driven robots. The book presents the state of the art, including both summarizing contributions as well as latest research and future options. The book cover all topics which are essential for cable-driven robots: Classification Kinematics, Workspace and Singularity Analysis Statics and Dynamics Cable Modeling Control and Calibration Design Methodology Hardware Development Experimental Evaluation Prototypes, Application Reports and new Application concepts.
Download or read book New Frontiers in Parallel Robots written by Zhufeng Shao and published by Mdpi AG. This book was released on 2023-07-05 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The parallel robot, a kind of robot that utilizes multiple closed-loop branch chains jointly connecting and driving the moving platform, is an important part of modern robotics, with outstanding advantages of high stiffness, high precision and high speed. Parallel robots can efficiently change performance through the configuration of synthesis and design. The rich variety of configurations and the existence of a large number of passive joints also brought abundant challenges and research topics to the modeling, optimization, calibration and trajectory planning of parallel robots. This book focuses on the research frontiers of parallel robots from fundamental theory to application technology. Special attention is paid to kinematics/dynamics modeling, error modeling and calibration, impedance control and the machining stability of parallel robots. Notably, a considerable portion of the book focuses on cable-driven parallel robots (CDPRs) that integrate cable-driven kinematic chains and parallel mechanism theory. CDPRs inherit the high dynamics and heavy load capacities of parallel robots and significantly improve the workspace, cost and energy efficiency simultaneously, following the cutting-edge trend of rigid-flexible fusion.
Download or read book Fundamentals of Parallel Robots written by Ilian A. Bonev and published by Springer Verlag. This book was released on 2010-06-01 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike a serial robot, in which the end-effector is connected to a base through a series of motor-actuated joints, the end-effector of a parallel robot is connected to the base through several mechanisms in parallel. This title provides an insight into the principles of motion that are responsible for the complex variety of parallel robots.
Download or read book Cable Driven Parallel Robots written by Clément Gosselin and published by Springer. This book was released on 2017-07-05 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents proceedings of the third international conference in this field, continuing the success of the previous events. The peer-reviewed and the selected papers are arranged to make the proposed book the most recent and complete overview on the State-of-the-Art in Cable-Driven Parallel Robots! The conference took place 2017 in Quebec, QC, Canada,
Download or read book Kinematics Singularity and Design of Parallel Robots written by Yawei Yang and published by . This book was released on 2008 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manipulators, usually resembling a human arm, are widely used in industry. The most popular manipulators are serial chain manipulators. But low transportable load and poor accuracy increasingly become problems of the usage with such kinds of robots. Consequently, closed loop chain mechanisms are introduced to resolve these problems. In comparison to serial robots, parallel robots have many advantages. But the complexity of singularity analysis and relatively small workspace are the major drawbacks for parallel robots. This thesis is focused on singularity analysis and kinematic design of parallel robots. The thesis makes three major contributions to the research of parallel robot kinematics. Firstly, the determination of unmanipulable singularities are presented. Through the decomposition of the composite manipulability Jacobian, they are identified as single-arm singularities or coincident with unstable singularities. Secondly, singularities are classified due to their relationship with the design purpose. A sequential design procedure is introduced for singularity free workspace design. For an n -arm parallel robot, n -1 arms are designed first to satisfy workspace requirements, then the last arm is designed to provide a singularity-free workspace. Planar and spatial parallel mechanism singularity-free workspace design examples are presented to verify the efficacy of this design method. Modeling of this design method is discussed, and optimization tools are suggested to solve the design problem. Thirdly, a novel 6-Degree Of Freedom composite parallel mechanism is introduced. It consists of two parallel mechanism-the planar 3-RP[barbelow]R and the spatial 3-UP[barbelow]S-1-PU. Inverse kinematics and singularity of this mechanism are analyzed. Different combinations are demonstrated for different applications.
Download or read book Parallel Robots written by Jean-Pierre Merlet and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Robotics Research written by John M. Hollerbach and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the proceedings of the 9th International Symposium of Robotics Research, one of the oldest and most prestigious conferences in robotics. The goal of the symposium was to bring together active, leading robotics researchers from academia, government and industry, to define the state of the art of robotics and its future direction. The broad spectrum of robotics research is covered, with an eye on what will be important in robotics in the next millennium.
Download or read book Cable Driven Parallel Robots written by Marc Gouttefarde and published by Springer. This book was released on 2022-06-02 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gathers the latest advances, innovations and applications in the field of cable robots, as presented by leading international researchers and engineers at the 5th International Conference on Cable-Driven Parallel Robots (CableCon 2021), held as virtual event on July 7-9, 2021. It covers the theory and applications of cable-driven parallel robots, including their classification, kinematics and singularity analysis, workspace, statics and dynamics, cable modeling and technologies, control and calibration, design methodologies, hardware development, experimental evaluation and prototypes, as well as application reports and new application concepts. The contributions, which were selected through a rigorous international peer-review process, share exciting ideas that will spur novel research directions and foster new multidisciplinary collaborations.