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Abstract

To ensure the stability and safety performance of rigid-flexible hybrid fingertip grasping objects, it is essential to elucidate the coupling relationships among various key forces and to establish a dynamic model. Furthermore, the impact of fingertip contact forces on the stability and safety of the grasp must be taken into account to achieve optimal parameter configurations. In this paper, a new model of a rigid-flexible hybrid hand fingertip grasping an object is established, the hybrid hand consists of three rigid-flexible hybrid fingers. The kinematics and dynamics of the model are solved, and the grasping pose is optimized based on the established stable and safe grasping performance index, which provides a theoretical basis for the safe and stable grasping of rigid-flexible hybrid hand. First, the kinematics, statics, and dynamics models of the hybrid hand are established, and the relationship between the external force/torque on the object, finger actuation torque, spring torque, and contact force are solved. Second, the simulation model of the hybrid hand is constructed, and theoretical solutions are verified by the constructed simulation model. Third, the connection between each component force at the contact point on the stability and safety of grasping is revealed, establishing the corresponding grasping index, which can be used to solve the optimal pose of grasping in the kinematic space of the hybrid hand. Under this optimal pose, the hybrid hand grasps the object in a way that is both stable and safe for grasping and resistant to interference. The paper provides a theoretical basis for the rigid-flexible hybrid hand to stabilize and safely grasp fragile objects.

Keywords

Rigid-flexible hybrid hand kinematics dynamics multi-finger grasping grasp optimization

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References

Dollar

Howe

. The highly adaptive SDM hand: Design and performance evaluation. Int J Rob Res 2010; 29: 585–597.

Birglen

Laliberté

Gosselin

. Underactuated Robotic Hands (Vol. 40). Berlin: Springer, 2008.

Wang

, et al. SAU-RFC hand: a novel self-adaptive underactuated robot hand with rigid-flexible coupling fingers. Robotica 2023; 41: 511–529.

Qiao

Guo

Liu

, et al. Self-adaptive grasp process and equilibrium configuration analysis of a 3-DOF UACT robotic finger. Mech Mach Theory 2019; 133: 250–266.

Liang

Zhang

. PASA-GB Hand: a novel parallel and self-adaptive robot hand with gear-belt mechanisms. J Intell Robotic Syst 2018; 90: 3–17.

Huang

Schimmels

. Grasp compliance achieved with a planar hand composed of multiple 3-joint fingers. Robotica 2022; 41: 587–608.

Borras

Dollar

. Dimensional synthesis of three-fingered robot hands for maximal precision manipulation workspace. Int J Rob Res 2015; 34: 1731–1746.

Hota

Kumar

. Effect of hand design and object size on the workspace of three-fingered hands. Mech Mach Theory 2019; 133: 311–328.

Borras

Dollar

. Analyzing dexterous hands using a parallel robots framework. Auton Robots 2014; 36: 169–180.

10.

Chen

Hong

, et al. Multi-fingered grasping force optimization based on generalized penalty-function concepts. Rob Auton Syst 2021; 135: 1–12.

11.

Wei

, et al. Geometric design-based dimensional synthesis of a novel metamorphic multi-fingered hand with maximal workspace. Chin J Mech Eng 2021; 34: 1–15.

12.

Mousavi

Somà

Pescarmona

. Effects of substituting anthropometric joints with revolute joints in humanoid robots and robotic hands: a case study. Robotica 2014; 33: 1034–1048.

13.

Townsend

. The BarrettHand grasper—programmably flexible part handling and assembly. Ind Robot: Int J 2000; 27: 181–188.

14.

. Unification and simplification of velocity/acceleration of limited-DOF parallel manipulators with linear active legs. Mech Mach Theory 2008; 43: 1112–1128.

15.

Rojas

Dollar

. Spherical hands: toward underactuated, in-hand manipulation invariant to object size and grasp location. J Mech Rob-Trans ASME 2016; 8: 1–12.

16.

Chang

, et al. Development and kinematics/statics analysis of rigid-flexible-soft hybrid finger mechanism with standard force sensor. Robot Comp Int Manuf 2021; 67: 101978.

17.

Babin

St-Onge

Gosselin

. Stable and repeatable grasping of flat objects on hard surfaces using passive and epicyclic mechanisms. Robot Comput Integr Manuf 2019; 55: 1–10.

18.

Kragten

Herder

. The ability of underactuated hands to grasp and hold objects. Mech Mach Theory 2010; 45: 408–425.

19.

Balasubramanian

Belter

Dollar

. Disturbance response of two-link underactuated serial-link chains. J Mech Rob-Trans ASME 2012; 4: 1–10.

20.

Dong

Zhang

. A review of robotic grasp detection technology. Robotica 2023; 41: 3846–3885.

21.

Mehdian

Johns-Rahnejat

Rahnejat

. Elastostatic contact imaging for a mechanoreceptive tactile device. Robotica 1993; 11: 329–337.

22.

Mehdian

Rahnejat

. A sensory gripper using tactile sensors for object recognition, orientation control, and stable manipulation. IEEE Trans Syst, Man, Cybern 1989; 19: 1250–1261.

23.

Bard

Troccaz

Vercelli

. Shape analysis and hand preshaping for grasping. In: IROS, 1991, 64–69.

24.

Cutkosky

. On grasp choice, grasp models, and the design of hands for manufacturing tasks. IEEE Trans Robot Autom 1989; 5: 269–279.

25.

Rosales

Suárez

Gabiccini

, et al. On the synthesis of feasible and prehensile robotic grasps. In: 2012 IEEE International Conference on Robotics and Automation, 2012, 550–556.

26.

Zhang

. Grasping force optimization for multi-fingered robotic hands using projection and contraction methods. J Optim Theory Appl 2019; 183: 592–608.

27.

Hota

Kumar

. Effect of design parameters on strong and immobilizing grasps with an underactuated robotic hand. Robotica 2022; 40: 3769–3785.

28.

Chang

. Development and dynamics of a novel couple-constrained parallel wrist with three measuring force flexible fingers. Robotica 2023; 41: 2713–2734.

29.

Huang

Ding

. Theory of Parallel Mechanisms. Dordrecht: Springer, 2013.

30.

Shi

. Solving reachable workspace of some parallel manipulators by computer-aided design variation geometry. Proc IMechE Part C-J Mech Eng Sci 2008; 222: 1773–1781.

Dynamics and optimization of grasping pose of rigid-flexible hybrid hand grasp object

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