Simulation and Experiment Study on Deformation Characteristics of the Water Hydraulic Flexible Actuator Used for the Underwater Gripper

A water hydraulic flexible gripper with three-fingered structure is developed to deal with the problem of poor adaptability for the existing underwater gripper. This gripper driven by water hydraulics can realize flexible grasping and possess simple structure, high pressure-bearing, strong adaptability and capability of anti-jamming to the water environment and easy to control. In particular, the water hydraulic flexible gripper system is an open system in relation to the underwater environment, with the water source being supplied directly by the underwater environment, eliminating the effects of back pressure generated by the underwater environment in comparison with the closed system of other grippers. It is a good solution to solve the problem of poor adaptability for the existing underwater gripper in underwater environment. The flexible actuator model is established to explore the key parameters influencing the deformation characteristics. The effects of different inlet pressure, knuckle length, wall thickness and material of the inner skeleton and external surface on the deformation characteristics of the flexible actuator are investigated through simulation. It is found that, for the flexible actuator, the wall thickness of the inner skeleton is selected as 1 mm and the inner skeleton length is designed with the first knuckle of 30 mm and the second knuckle of 80 mm. Based on the optimal parameters obtained through simulation, the prototype of flexible actuator and flexible gripper are fabricated. Experiment is performed to test the deformation of the flexible actuator under different inlet pressure. It is found that the experiment results are consistent with the simulation results. Both of the experiment and simulation results exhibit that the total deformation of the flexible actuator is proportional to the inlet pressure. The research will lay foundation for the optimal design of flexible actuator used for the underwater gripper driven by water hydraulics.

[1]  Wei Li Wu,et al.  Study on Short Basalt Fiber Reinforced Fluorine Rubber Composites , 2013 .

[2]  Bijan Shirinzadeh,et al.  Design, analysis, and experimental investigation of a single-stage and low parasitic motion piezoelectric actuated microgripper , 2020 .

[3]  Oliver Brock,et al.  A novel type of compliant and underactuated robotic hand for dexterous grasping , 2016, Int. J. Robotics Res..

[4]  Li Yang,et al.  Magnetic actuation bionic robotic gripper with bistable morphing structure , 2019 .

[5]  Xue Wen-bo.  Fatigue Behavior of 3J21 Alloy at Different Aged States , 2007 .

[6]  Keehoon Kim,et al.  Electrohydraulic Actuator for a Soft Gripper. , 2020, Soft robotics.

[7]  L. Zhanga,et al.  Microstructure , defects and mechanical behavior of beta-type titanium porous structures manufactured by electron beam melting and selective laser melting , 2017 .

[8]  S. Okabe,et al.  Fabrication of silicone rubber nanocomposites and quantitative evaluation of dispersion state of nanofillers , 2012, IEEE Transactions on Dielectrics and Electrical Insulation.

[9]  Gabriel Oliver,et al.  Intervention AUVs: The next challenge , 2015, Annu. Rev. Control..

[10]  Jiamei Jin,et al.  A novel piezoelectric actuated underwater robotic finger , 2019, Smart Materials and Structures.

[11]  Applied Elasticity , 1928, Nature.

[12]  Ujjaval Gupta,et al.  Soft robots based on dielectric elastomer actuators: a review , 2019, Smart Materials and Structures.

[13]  Kasper Hancke,et al.  A low-cost remotely operated vehicle (ROV) with an optical positioning system for under-ice measurements and sampling , 2018, Cold Regions Science and Technology.

[14]  Jonathan Rossiter,et al.  Soft-smart robotic end effectors with sensing, actuation, and gripping capabilities , 2019, Smart Materials and Structures.

[15]  Nicholas X. Fang,et al.  Multimaterial 4D Printing with Tailorable Shape Memory Polymers , 2016, Scientific Reports.

[16]  Zhike Peng,et al.  Multisegment annular dielectric elastomer actuators for soft robots , 2018, Smart Materials and Structures.

[17]  Edin Omerdic,et al.  Underwater manipulators: A review , 2018, Ocean Engineering.

[18]  Carmel Majidi,et al.  A Soft Gripper with Rigidity Tunable Elastomer Strips as Ligaments. , 2017, Soft robotics.

[19]  Dominiek Reynaerts,et al.  Pneumatic and hydraulic microactuators: a review , 2010 .

[20]  Bina Ravi,et al.  Design and Development of Automotive Carbon Fiber Bracket , 2018, IOP Conference Series: Materials Science and Engineering.

[21]  Huang Tao,et al.  Study on Thermal Deformation Behavior of TC4 - ELI Titanium Alloy , 2018 .

[22]  Oliver Brock,et al.  A compliant hand based on a novel pneumatic actuator , 2013, 2013 IEEE International Conference on Robotics and Automation.

[23]  Zheng Wang,et al.  A Soft-Robotic Gripper With Enhanced Object Adaptation and Grasping Reliability , 2017, IEEE Robotics and Automation Letters.

[24]  Guoying Gu,et al.  Bioinspired Venus flytrap : A dielectric elastomer actuated soft gripper , 2017, 2017 24th International Conference on Mechatronics and Machine Vision in Practice (M2VIP).

[25]  Tanveer Saleh,et al.  PDMS-based dual-channel pneumatic micro-actuator , 2019, Smart Materials and Structures.

[26]  Guozheng Liang,et al.  Application of a new modified epoxy adhesive for bonding fluorine rubber to metal , 2007 .

[27]  Lionel Lapierre,et al.  Hybrid underwater robotic vehicles: the state-of-the-art and future trends , 2015 .

[28]  D. Floreano,et al.  Soft Robotic Grippers , 2018, Advanced materials.

[29]  Ujjaval Gupta,et al.  A soft gripper of fast speed and low energy consumption , 2018, Science China Technological Sciences.

[30]  Elena Villa,et al.  The high potential of shape memory alloys in developing miniature mechanical devices: A review on shape memory alloy mini-actuators , 2010 .

[31]  V Deplano,et al.  In-plane mechanics of soft architectured fibre-reinforced silicone rubber membranes. , 2014, Journal of the mechanical behavior of biomedical materials.

[32]  Norbert Schell,et al.  Peritectic titanium alloys for 3D printing , 2018, Nature Communications.

[33]  Shunping Chen,et al.  Near‐Infrared Light Triggered Soft Actuators in Aqueous Media Prepared from Shape‐Memory Polymer Composites , 2016 .

[34]  Je-Sung Koh,et al.  Shape memory alloy actuator-embedded smart clothes for ankle assistance , 2020, Smart Materials and Structures.

[35]  MajidiCarmel,et al.  A Soft Gripper with Rigidity Tunable Elastomer Strips as Ligaments. , 2017 .

[36]  Amir Hosein Sakhaei,et al.  Multimaterial 4D Printing with Tailorable Shape Memory Polymers , 2016, Scientific Reports.