Abstract
This paper investigates various topologies and mobility of a class of metamorphic parallel mechanisms synthesized with reconfigurable rTPS limbs. Based on the reconfigurable Hooke (rT) joint, the rTPS limb has two phases which result in parallel mechanisms having ability of mobility change. While in one phase the limb has no constraint to the platform, in the other it constrains the spherical joint center to lie on a plane which is used to demonstrate different topologies of the nrTPS metamorphic parallel mechanisms by investigating various relations (parallel or intersecting) among the n constraint planes (n = 2,3,..,6). Geometric constraint equations of the platform rotation matrix and translation vector are set up based on the point-plane constraint, which reveals mobility and redundant geometric conditions of the mechanism topologies. By altering the limbs into the non-constraint phase without constraint plane, new mechanism phases are deduced with mobility change based on each mechanism topology.
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Recommended by Associate Editor Ki-Hoon Shin
Dongming Gan received his Ph.D. based on a joint program with Beijing University of Posts and Telecommunications and King’s College London in 2009. He is currently an Assistant Professor in Mechanical Engineering and Robotics at Khalifa University of Science, Technology and Research, Abu Dhabi, UAE. His research interests include mechanism modeling and design, reconfigurable mechanisms and robots with applications on automation, rehabilitation and manufacturing.
Jian S Dai received his Ph.D. from the University of Salford in UK in 1993. He is currently a chair Professor in mechanisms and robotics in King’s College London. Professor Dai’s research and teaching are in the area of kinematics, mechanisms, robotics, and their application to rehabilitation, surgical robotics and industrial packaging particularly reconfigurable mechanisms with four books, over 400 publications and a number of best paper awards in journals and conferences. He is ASME fellow, IMechE fellow and received a number of service awards including outstanding service award from ASME and IEEE.
Jorge Dias received the Ph.D. in electrical engineering with specialization in control and instrumentation from the University of Coimbra, Coimbra, Portugal, in 1994. He holds his research activities at the Insti tute of Systems and Robotics (ISR), University of Coimbra, and also at the Khalifa University of Science, Technology and Research. His current research areas are computer vision and robotics, with activities and contributions in these fields since 1984. Dr. Dias is currently in the Board of Officers from the Portuguese Chapter for the IEEE Robotics and Automation Society.
Lakmal D. Seneviratne received B.Sc.(Eng.) and Ph.D. degrees in Mechanical Engineering from King’s College London (KCL), London, U.K. He is currently a Professor in Mechanical Engineering and the Director of the Robotics Institute at Khalifa University. He is also an Emeritus Professor at King’s College London. His research interests are focused on robotics and autonomous systems. He has published over 300 refereed research papers related to these topics.
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Gan, D., Dai, J.S., Dias, J. et al. Constraint-plane-based synthesis and topology variation of a class of metamorphic parallel mechanisms. J MECH SCI TECHNOL 28, 4179–4191 (2014). https://doi.org/10.1007/s12206-014-0931-7
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DOI: https://doi.org/10.1007/s12206-014-0931-7