Adaptive Sampling-based Path Planning for Mobile CDPR with Considering Kinematic Stability and Constraints

Jiajun Xu 2022년
논문상세정보
' Adaptive Sampling-based Path Planning for Mobile CDPR with Considering Kinematic Stability and Constraints' 의 주제별 논문영향력
논문영향력 선정 방법
논문영향력 요약
주제
  • Kinematic and Stability analysis
  • Mobile cable driven parallel robots
  • Path planning
  • adaptive sampling
  • workspaceanalysis
동일주제 총논문수 논문피인용 총횟수 주제별 논문영향력의 평균
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' Adaptive Sampling-based Path Planning for Mobile CDPR with Considering Kinematic Stability and Constraints' 의 참고문헌

  • [9] Merlet, Jean-Pierre, and Julien Alexandre-dit-Sandretto. "The forward kinematics of cable-driven parallel robots with sagging cables." Cable-Driven Parallel Robots. Springer, Cham (2015): 3-15.
    [2015]
  • [99] LaValle, Steven M. "Rapidly-exploring random trees: A new tool for path planning." (1998): 98-11.
    [1998]
  • [98] Jaillet, Léonard, Juan Cortés, and Thierry Siméon. "Sampling-based path planning on configuration-space costmaps." IEEE Transactions on Robotics 26.4 (2010): 635-646.
    [2010]
  • [97] Lin, Yucong, and Srikanth Saripalli. "Sampling-based path planning for UAV collision avoidance." IEEE Transactions on Intelligent Transportation Systems 18.11 (2017): 3179-3192.
    [2017]
  • [96] Karaman, Sertac, and Emilio Frazzoli. "Sampling-based algorithms for optimal motion planning." The international journal of robotics research 30.7 (2011): 846-894.
    [2011]
  • [95] Idà, Edoardo, Tobias Bruckmann, and Marco Carricato. "Rest-to-rest trajectory planning for underactuated cable-driven parallel robots." IEEE Transactions on Robotics 35.6 (2019): 1338-1351.
    [2019]
  • [94] Jiang, Xiaoling, and Clement Gosselin. "Dynamic point-to-point trajectory planning of a three-DOF cable-suspended parallel robot." IEEE transactions on Robotics 32.6 (2016): 1550-1557.
    [2016]
  • [93] Krell, Evan, Scott A. King, and Luis Rodolfo Garcia Carrillo. "Autonomous Surface Vehicle energy-efficient and reward-based path planning using Particle Swarm Optimization and Visibility Graphs." Applied Ocean Research 122 (2022): 103125.
  • [92] Li, Guanghui, et al. "An efficient improved artificial potential field based regression search method for robot path planning." 2012 IEEE International Conference on Mechatronics and Automation. IEEE (2012).
    [2012]
  • [91] Xu, Jiajun, and Kyoung-Su Park. "A real-time path planning algorithm for cable-driven parallel robots in dynamic environment based on artificial potential guided RRT." Microsystem Technologies 26.11 (2020): 3533-3546.
    [2020]
  • [90] Deng, Yong, et al. "Fuzzy Dijkstra algorithm for shortest path problem under uncertain environment." Applied Soft Computing 12.3 (2012): 1231-1237.
    [2012]
  • [8] Miermeister, Philipp, et al. "An elastic cable model for cable-driven parallel robots including hysteresis effects." Cable-Driven Parallel Robots. Springer, Cham (2015): 17-28.
    [2015]
  • [89] Warren, Charles W. "Fast path planning using modified A* method." [1993] Proceedings IEEE International Conference on Robotics and Automation. IEEE (1993).
    [1993]
  • [88] Stentz, Anthony. "Optimal and efficient path planning for partially known environments." Intelligent unmanned ground vehicles. Springer, Boston, MA, (1997): 203-220.
    [1997]
  • [87] Perreault, Simon, and Clément M. Gosselin. "Cable-driven parallel mechanisms: Application to a locomotion interface." (2008): 102301.
    [2008]
  • [86] Williams, Robert L., and Paolo Gallina. "Planar cable-direct-driven robots: design for wrench exertion." Journal of intelligent and robotic systems 35.2 (2002): 203-219.
    [2002]
  • [85] Gagliardini, Lorenzo, Marc Gouttefarde, and Stephane Caro. "Determination of a dynamic feasible workspace for cable-driven parallel robots." Advances in Robot Kinematics 2016. Springer, Cham (2018): 361-370.
    [2018]
  • [84] Lau, Darwin, Denny Oetomo, and Saman K. Halgamuge. "Wrench-closure workspace generation for cable driven parallel manipulators using a hybrid analytical-numerical approach." (2011): 071004.
    [2011]
  • [83] Diao, Xiumin, and Ou Ma. "A method of verifying force-closure condition for general cable manipulators with seven cables." Mechanism and Machine Theory 42.12 (2007): 1563-1576.
    [2007]
  • [82] Pham, Cong Bang, et al. "Force-closure workspace analysis of cable-driven parallel mechanisms." Mechanism and Machine Theory 41.1 (2006): 53-69.
    [2006]
  • [81] Bosscher, Paul, Andrew T. Riechel, and Imme Ebert-Uphoff. "Wrenchfeasible workspace generation for cable-driven robots." IEEE Transactions on Robotics 22.5 (2006): 890-902.
    [2006]
  • [80] Pusey, Jason, et al. "Design and workspace analysis of a 6–6 cable-suspended parallel robot." Mechanism and machine theory 39.7 (2004): 761-778.
    [2004]
  • [7] Eckhoff, Jürgen. "Helly, Radon, and Carathéodory type theorems." Handbook of convex geometry. North-Holland (1993): 389-448.
    [1993]
  • [79] Martin, Antoine, Stéphane Caro, and Philippe Cardou. "Geometric determination of the cable-cylinder interference regions in the workspace of a cable-driven parallel robot." Cable-Driven Parallel Robots. Springer, Cham (2018): 117-127.
    [2018]
  • [78] Handojo, Vincentius A., et al. "Cable Driven Parallel Robot with Big Interference-Free Workspace." Mechanism and Machine Science. Springer, Singapore (2021): 43-56.
  • [77] Rasheed, Tahir, et al. "Tension distribution algorithm for planar mobile cabledriven parallel robots." Cable-Driven Parallel Robots. Springer, Cham (2018): 268-279.
    [2018]
  • [76] Hussein, Hussein, et al. "Smallest maximum cable tension determination for cable-driven parallel robots." IEEE Transactions on Robotics (2021): 1186- 1205.
  • [75] Riechel, Andrew T., and Imme Ebert-Uphoff. "Force-feasible workspace analysis for underconstrained, point-mass cable robots." IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA'04. 2004. Vol. 5. IEEE (2004).
  • [74] Fabritius, Marc, and Andreas Pott. "An inverse kinematic code for cabledriven parallel robots considering cable sagging and pulleys." European Conference on Mechanism Science. Springer, Cham (2020).
    [2020]
  • [73] Fabritius, Marc, and Andreas Pott. "A forward kinematic code for cable-driven parallel robots considering cable sagging and pulleys." International Symposium on Advances in Robot Kinematics. Springer, Cham (2020).
    [2020]
  • [72] Boudreau, Roger, and Noyan Turkkan. "Solving the forward kinematics of parallel manipulators with a genetic algorithm." Journal of robotic systems 13.2 (1996): 111-125.
    [1996]
  • [71] Merlet, Jean-Pierre. "On the inverse kinematics of cable-driven parallel robots with up to 6 sagging cables." 2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE (2015).
    [2015]
  • [70] Paty, Thibaut, et al. "Cable-driven parallel robot modelling considering pulley kinematics and cable elasticity." Mechanism and Machine Theory 159 (2021): 104263.
  • [6] Cook, W. D., and R. J. Webster. "Caratheodory's theorem." Canadian Mathematical Bulletin 15.2 (1972): 293-293.
    [1972]
  • [69] Abbasnejad, Ghasem, and Marco Carricato. "Direct geometrico-static problem of underconstrained cable-driven parallel robots with n cables." IEEE Transactions on Robotics 31.2 (2015): 468-478.
    [2015]
  • [68] Piao, Jinlong, et al. "Development of a high payload cable-driven parallel robot." 2017 17th International Conference on Control, Automation and Systems (ICCAS). IEEE (2017).
    [2017]
  • [67] Bak, Jeong-Hyeon, et al. "Sliding-mode control of cable-driven parallel robots with elastic cables." 2016 16th International Conference on Control, Automation and Systems (ICCAS). IEEE (2016).
    [2016]
  • [66] Santos, João Cavalcanti, and Marc Gouttefarde. "A real-time capable forward kinematics algorithm for cable-driven parallel robots considering pulley kinematics." International Symposium on Advances in Robot Kinematics. Springer, Cham (2020).
    [2020]
  • [65] Pott, Andreas. "Influence of pulley kinematics on cable-driven parallel robots." Latest Advances in Robot Kinematics. Springer, Dordrecht (2012): 197-204.
    [2012]
  • [64] Barbazza, Luca, et al. "Design and optimal control of an underactuated cabledriven micro–macro robot." IEEE Robotics and Automation Letters 2.2 (2017): 896-903.
    [2017]
  • [63] Zhang, Zhaokun, et al. "Kinematic Calibration of Cable-Driven Parallel Robots Considering the Pulley Kinematics." Mechanism and Machine Theory 169 (2022): 104648.
  • [62] Gao, Bingtuan, et al. "Inverse kinematics and workspace analysis of a cabledriven parallel robot with a spring spine." Mechanism and Machine Theory 76 (2014): 56-69.
    [2014]
  • [61] Roberts, Rodney G., Todd Graham, and Thomas Lippitt. "On the inverse kinematics, statics, and fault tolerance of cable‐suspended robots." Journal of Robotic Systems 15.10 (1998): 581-597.
    [1998]
  • [60] Pott, Andreas, and Philipp Tempel. "A unified approach to forward kinematics for cable-driven parallel robots based on energy." International Symposium on Advances in Robot Kinematics. Springer, Cham (2018).
    [2018]
  • [5] Gosselin, Clément. "Cable-driven parallel mechanisms: state of the art and perspectives." Mechanical Engineering Reviews 1.1 (2014): DSM0004- DSM0004.
    [2014]
  • [59] Merlet, Jean-Pierre. "Kinematics of the wire-driven parallel robot MARIONET using linear actuators." 2008 IEEE International Conference on Robotics and Automation. IEEE (2008).
    [2008]
  • [58] Kucuk, Serdar, and Zafer Bingul. "Robot kinematics: Forward and inverse kinematics". INTECH Open Access Publisher, (2006).
    [2006]
  • [57] Davidson, Joseph K., Kenneth H. Hunt, and Gordon R. Pennock. "Robots and screw theory: applications of kinematics and statics to robotics." J. Mech. Des. 126.4 (2004): 763-764.
    [2004]
  • [56] Waldron, Kenneth J., and James Schmiedeler. "Kinematics." Springer handbook of robotics. Springer, Cham (2016): 11-36.
    [2016]
  • [55] Masone, Carlo, Heinrich H. Bülthoff, and Paolo Stegagno. "Cooperative transportation of a payload using quadrotors: A reconfigurable cable-driven parallel robot." 2016 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE (2016).
    [2016]
  • [54] Cruz, Patricio, and Rafael Fierro. "Autonomous lift of a cable-suspended load by an unmanned aerial robot." 2014 IEEE conference on control applications (CCA). IEEE (2014).
    [2014]
  • [53] Seriani, Stefano, Paolo Gallina, and A. Wedler. "A modular cable robot for inspection and light manipulation on celestial bodies." Acta Astronautica 123 (2016): 145-153.
    [2016]
  • [52] Zi, Bin, Jun Lin, and Sen Qian. "Localization, obstacle avoidance planning and control of a cooperative cable parallel robot for multiple mobile cranes." Robotics and Computer-Integrated Manufacturing 34 (2015): 105- 123.
    [2015]
  • [50] Izard, Jean-Baptiste, et al. "Integration of a parallel cable-driven robot on an existing building façade." Cable-driven parallel robots. Springer, Berlin, Heidelberg (2013): 149-164.
    [2013]
  • [4] Qian, Sen, et al. "A review on cable-driven parallel robots." Chinese Journal of Mechanical Engineering 31.1 (2018): 1-11.
    [2018]
  • [49] Izard, Jean-Baptiste, et al. "On the improvements of a cable-driven parallel robot for achieving additive manufacturing for construction." Cable-driven parallel robots. Springer, Cham (2018): 353-363.
    [2018]
  • [48] Izard, Jean-Baptiste, et al. "A reconfigurable robot for cable-driven parallel robotic research and industrial scenario proofing." Cable-driven parallel robots. Springer, Berlin, Heidelberg (2013):135-148.
    [2013]
  • [47] Zhao, Tao, et al. "Typical configuration analysis of a modular reconfigurable cable-driven parallel robot." International Journal of Advanced Robotic Systems 16.2 (2019): 1729881419834756.
    [2019]
  • [46] Kumar, Rajesh, and Sudipto Mukherjee. "Enhanced dynamic capability of cable-driven parallel manipulators by reconfiguration." Robotica 39.12 (2021): 2153-2171.
  • [45] Nguyen, Dinh Quan, and Marc Gouttefarde. "Study of reconfigurable suspended cable-driven parallel robots for airplane maintenance." 2014 IEEE/RSJ International Conference on Intelligent Robots and Systems. IEEE (2014).
    [2014]
  • [44] Nguyen, Dinh Quan, et al. "On the analysis of large-dimension reconfigurable suspended cable-driven parallel robots." 2014 IEEE international conference on robotics and automation (ICRA). IEEE (2014).
    [2014]
  • [42] Makino, Toru, and Takashi Harada. "Cable collision avoidance of a pulley embedded cable-driven parallel robot by kinematic redundancy." Proceedings of the 4th International Conference on Control, Mechatronics and Automation. (2016).
    [2016]
  • [41] Gagliardini, Lorenzo, et al. "A reconfiguration strategy for reconfigurable cable-driven parallel robots." 2015 IEEE international conference on robotics and automation (ICRA). IEEE (2015).
    [2015]
  • [40] Blanchet, Laurent, and Jean-Pierre Merlet. "Interference detection for cabledriven parallel robots (CDPRs)." 2014 IEEE/ASME International Conference on Advanced Intelligent Mechatronics. IEEE (2014).
    [2014]
  • [3] Brogårdh, Torgny. "Robot control overview: An industrial perspective." Modeling, Identification and Control 30.3 (2009): 167.
    [2009]
  • [39] Nguyen, Dinh Quan, and Marc Gouttefarde. "On the improvement of cable collision detection algorithms." Cable-Driven Parallel Robots. Springer, Cham (2015): 29-40.
    [2015]
  • [38] Boumann, Roland, and Tobias Bruckmann. "Simulation and Model-Based Verification of an Emergency Strategy for Cable Failure in Cable Robots." Actuators. Vol. 11. No. 2. MDPI (2022).
  • [37] Winter, David Lukas, and Christoph Ament. "Development of Safety Concepts for Cable-Driven Parallel Robots." International Conference on Cable-Driven Parallel Robots. Springer, Cham, 2021.
  • [36] Deng, Sai, et al. "Multi-objective pose optimal distribution method for the feed support system of Five-hundred-meter Aperture Spherical radio Telescope." International Journal of Advanced Robotic Systems 15.1 (2018): 1729881418756695.
    [2018]
  • [35] Yao, Rui, et al. "Dimensional optimization design of the four-cable-driven parallel manipulator in fast." IEEE/ASME Transactions On Mechatronics 15.6 (2009): 932-941.
    [2009]
  • [34] Nan, Rendong, et al. "The five-hundred-meter aperture spherical radio telescope (FAST) project." International Journal of Modern Physics D 20.06 (2011): 989-1024.
    [2011]
  • [33] Peng, B., et al. "Five-hundred-meter aperture spherical telescope project." International Astronomical Union Colloquium. Vol. 182. Cambridge University Press (2001).
    [2001]
  • [32] Jin, XueJun, et al. "Workspace analysis of upper limb for a planar cable-driven parallel robots toward upper limb rehabilitation." 2014 14th International Conference on Control, Automation and Systems (ICCAS 2014). IEEE (2014).
  • [31] Wang, Deri, et al. "Winch-integrated mobile end-effector for a cable-driven parallel robot with auto-installation." International Journal of Control, Automation and Systems 15.5 (2017): 2355-2363.
    [2017]
  • [30] Kawamura, Sadao, Hitoshi Kino, and Choe Won. "High-speed manipulation by using parallel wire-driven robots." Robotica 18.1 (2000): 13-21.
    [2000]
  • [2] Ebert-Uphoff, Imme, and Philip A. Voglewede. "On the connections between cable-driven robots, parallel manipulators and grasping." IEEE International Conference on Robotics and Automation, 2004. Proceedings. ICRA'04. 2004. Vol. 5. IEEE (2004).
  • [29] Kawamura, Sadao, et al. "Development of an ultrahigh speed robot FALCON using parallel wire drive systems." Journal of the Robotics Society of Japan 15.1 (1997): 82-89.
    [1997]
  • [28] Izard, Jean-Baptiste, et al. "A reconfigurable robot for cable-driven parallel robotic research and industrial scenario proofing." Cable-driven parallel robots. Springer, Berlin, Heidelberg (2013): 135-148.
    [2013]
  • [27] Izard, Jean-Baptiste, et al. "Integration of a parallel cable-driven robot on an existing building façade." Cable-driven parallel robots. Springer, Berlin, Heidelberg (2013): 149-164.
    [2013]
  • [26] Platis, Angelos, et al. "Isotropic design of the spherical wrist of a cable-driven parallel robot." Advances in Robot Kinematics 2016. Springer, Cham (2018): 321-330.
    [2018]
  • [25] Métillon, Marceau, et al. "A cable-driven parallel robot with full-circle endeffector rotations." Journal of Mechanisms and Robotics 13.3 (2021): 031017.
  • [24] Jensen, Finn Verner, Claus Skaanning, and Uffe Kjaerulff. "The SACSO System for Troubleshooting of Printing Systems." SCAI. (2001).
    [2001]
  • [23] Jensen, Finn V., et al. "The SACSO methodology for trouble shooting complex systems." AI EDAM 15.4 (2001): 321-333.
    [2001]
  • [22] Lafourcade, Pascal, Michel Llibre, and Claude Reboulet. "Design of a parallel wire-driven manipulator for wind tunnels." Proceedings of the Workshop on Fundamental Issues and Future Research Directions for Parallel Mechanisms and Manipulators. Quebec City, Canada, (2002).
    [2002]
  • [21] Pott, Andreas, et al. "IPAnema: a family of cable-driven parallel robots for industrial applications." Cable-Driven Parallel Robots. Springer, Berlin, Heidelberg (2013): 119-134.
    [2013]
  • [20] Mroz, Geoff. "Design and prototype of a parallel, wire-actuated robot". Queen's University, (2003).
    [2003]
  • [1] Pott, Andreas. "Cable-driven parallel robots". Ed. Tobias Bruckmann. Berlin, Heidelberg: Springer (2013).
    [2013]
  • [19] Gordievsky, Vladimir. "Design and control of a robotic cable-suspended camera system for operation in 3-D industrial environment". Diss. Massachusetts Institute of Technology, (2008).
    [2008]
  • [18] Bosscher, Paul, et al. "Cable-suspended robotic contour crafting system." Automation in construction 17.1 (2007): 45-55.
    [2007]
  • [17] BostelMan, Roger, et al. "RoboCrane [R] project: An advanced concept for large scale manufacturing." AUVSI-PROCEEDINGS. (1996).
    [1996]
  • [16] Bostelman, Roger, et al. "Applications of the NIST RoboCrane." Proceedings of the 5th International Symposium on Robotics and Manufacturing. Vol. 5. (1994).
    [1994]
  • [15] Perreault, Simon, et al. "Geometric determination of the interference-free constant-orientation workspace of parallel cable-driven mechanisms." (2010): 031016.
    [2010]
  • [14] Merlet, Jean-Pierre. "Analysis of the influence of wires interference on the workspace of wire robots." On Advances in Robot Kinematics. Springer, Dordrecht, 2004. 211-218.
    [2004]
  • [13] Guttered, Marc, et al. "A versatile tension distribution algorithm for n -DOF parallel robots driven by n + 2 cables." IEEE Transactions on Robotics 31.6 (2015): 1444-1457.
    [2015]
  • [12] Lim, Wen Bin, Song Huat Yeo, and Guilin Yang. "Optimization of tension distribution for cable-driven manipulators using tension-level index." IEEE/ASME Transactions on Mechatronics 19.2 (2013): 676-683.
    [2013]
  • [11] Verhoeven, Richard. "Analysis of the workspace of tendon based Stewart platforms". Diss. Duisburg, Essen, Univ., Diss. (2004).
    [2004]
  • [115] Alexander, James C., and John H. Maddocks. "On the kinematics of wheeled mobile robots." The International Journal of Robotics Research 8.5 (1989): 15- 27.
    [1989]
  • [114] McKinley, Sky, and Megan Levine. "Cubic spline interpolation." College of the Redwoods 45.1 (1998): 1049-1060.
    [1998]
  • [113] Bergen, Gino van den. "A fast and robust GJK implementation for collision detection of convex objects." Journal of graphics tools 4.2 (1999): 7-25.
    [1999]
  • [112] Barber, C. Bradford, David P. Dobkin, and Hannu Huhdanpaa. "The quickhull algorithm for convex hulls." ACM Transactions on Mathematical Software (TOMS) 22.4 (1996): 469-483.
    [1996]
  • [111] Rooban, S., et al. "Coppeliasim: Adaptable modular robot and its different locomotions simulation framework." Materials Today: Proceedings (2021).
  • [110] Henriques, João F., et al. "High-speed tracking with kernelized correlation filters." IEEE transactions on pattern analysis and machine intelligence 37.3 (2014): 583-596.
    [2014]
  • [10] Merlet, Jean-Pierre. "Singularity of cable-driven parallel robot with sagging cables: preliminary investigation." 2019 International Conference on Robotics and Automation (ICRA). IEEE (2019).
    [2019]
  • [108] Xu, J., Qian, C., Park, J. W., & Park, K. S. . "Adaptive Sampling-Based Moving Obstacle Avoidance for Cable-Driven Parallel Robots. " IEEE/ASME Transactions on Mechatronics. (2022)
    [2022]
  • [107] Rasheed, Tahir, et al. "Optimization based trajectory planning of mobile cabledriven parallel robots." 2019 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS). IEEE (2019).
    [2019]
  • [106] Rasheed, Tahir, et al. "Path planning of a mobile cable-driven parallel robot in a constrained environment." International Conference on Cable-Driven Parallel Robots. Springer, Cham (2019).
    [2019]
  • [105] Mishra, Utkarsh A., Marceau Métillon, and Stéphane Caro. "Kinematic Stability based AFG-RRT* Path Planning for Cable-Driven Parallel Robots." 2021 IEEE International Conference on Robotics and Automation (ICRA). IEEE (2021).
  • [104] Zhang, Bin, Weiwei Shang, and Shuang Cong. "Optimal RRT* planning and synchronous control of cable-driven parallel robots." 2018 3rd international conference on advanced robotics and mechatronics (ICARM). IEEE (2018).
    [2018]
  • [103] Chi, Wenzheng, Jiankun Wang, and Max Qing-Hu Meng. "Risk-Informed- RRT*: A sampling-based human-friendly motion planning algorithm for mobile service robots in indoor environments." 2018 IEEE International Conference on Information and Automation (ICIA). IEEE (2018).
    [2018]
  • [102] Gammell, Jonathan D., Siddhartha S. Srinivasa, and Timothy D. Barfoot. "Informed RRT*: Optimal sampling-based path planning focused via direct sampling of an admissible ellipsoidal heuristic." 2014 IEEE/RSJ International Conference on Intelligent Robots and Systems. IEEE (2014).
    [2014]
  • [101] Karaman, Sertac, and Emilio Frazzoli. "Sampling-based algorithms for optimal motion planning." The international journal of robotics research 30.7 (2011): 846-894.
    [2011]
  • [100] Bak, Jeong-Hyeon, et al. "Collision-free path planning of cable-driven parallel robots in cluttered environments." Intelligent Service Robotics 12.3 (2019): 243- 253.
    [2019]
  • Robust online matrix factorization for dynamic background subtraction
    Yong , Hongwei , . 1726-1740 [2017]
  • Discrete reconfiguration planning for cabledriven parallel robots .
    Gagliardini , Lorenzo , . 100 (313-337 . [2016]
  • Development of modular cable-driven parallel robotic systems
    Qian , Sen , 75541-5553 [2018]