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Wu L, Huang R, Tang L, Ning X, Zhu J, Ma X. A novel in-situ dynamic mechanical analysis for human plantar soft tissue: The device design, definition of characteristics, test protocol, and preliminary results. Heliyon 2024; 10:e29986. [PMID: 38707476 PMCID: PMC11068617 DOI: 10.1016/j.heliyon.2024.e29986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 05/07/2024] Open
Abstract
The in-situ mechanical characterization of elastomers is not highly regarded due to the existence of a well-established set of sample-based standard tests for research and industry. However, there are certain situations or materials, like biological soft tissue, where an in-situ approach is necessary due to the impossibility of sampling from a living body. We have developed a dynamic mechanical analysis (DMA)-like device to approach in-vivo and in-situ multidimensional stress-strain properties of human plantar soft tissues. This work elucidates the operational mechanism of the novel measurement, with the definition of a new set of moduli, test standardization and protocol. Exploratory results of a volunteer's living plantar, silica rubber samples are presented with well preciseness and consistence as expected.
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Affiliation(s)
- Longyan Wu
- Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
| | - Ran Huang
- Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
- Yiwu Research Institute of Fudan University, Yiwu, Zhejiang, 322000, China
- Center for Innovation and Entrepreneurship, Taizhou Institute of Zhejiang University, Taizhou, Zhejiang, 318000, China
| | - Lisheng Tang
- Center for Innovation and Entrepreneurship, Taizhou Institute of Zhejiang University, Taizhou, Zhejiang, 318000, China
| | - Xinyi Ning
- Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
| | - Jun Zhu
- Yiwu Research Institute of Fudan University, Yiwu, Zhejiang, 322000, China
| | - Xin Ma
- Academy for Engineering and Technology, Fudan University, Shanghai, 200433, China
- Shanghai Sixth People's Hospital, Shanghai Jiao Tong University, Shanghai, 200233, China
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Wan Q, Luo A, Meng Y, Zhang C, Chi W, Zhang S, Liu Y, Zhu Q, Kong S, Yu J. Learning and Reusing Quadruped Robot Movement Skills from Biological Dogs for Higher-Level Tasks. SENSORS (BASEL, SWITZERLAND) 2023; 24:28. [PMID: 38202890 PMCID: PMC10780440 DOI: 10.3390/s24010028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2023] [Revised: 12/13/2023] [Accepted: 12/18/2023] [Indexed: 01/12/2024]
Abstract
In the field of quadruped robots, the most classic motion control algorithm is based on model prediction control (MPC). However, this method poses challenges as it necessitates the precise construction of the robot's dynamics model, making it difficult to achieve agile movements similar to those of a biological dog. Due to these limitations, researchers are increasingly turning to model-free learning methods, which significantly reduce the difficulty of modeling and engineering debugging and simultaneously reduce real-time optimization computational burden. Inspired by the growth process of humans and animals, from learning to walk to fluent movements, this article proposes a hierarchical reinforcement learning framework for the motion controller to learn some higher-level tasks. First, some basic motion skills can be learned from motion data captured from a biological dog. Then, with these learned basic motion skills as a foundation, the quadruped robot can focus on learning higher-level tasks without starting from low-level kinematics, which saves redundant training time. By utilizing domain randomization techniques during the training process, the trained policy function can be directly transferred to a physical robot without modification, and the resulting controller can perform more biomimetic movements. By implementing the method proposed in this article, the agility and adaptability of the quadruped robot can be maximally utilized to achieve efficient operations in complex terrains.
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Affiliation(s)
- Qifeng Wan
- State Key Laboratory for Turbulence and Complex Systems, Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing 100871, China; (Q.W.); (A.L.); (Y.M.); (S.K.)
| | - Aocheng Luo
- State Key Laboratory for Turbulence and Complex Systems, Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing 100871, China; (Q.W.); (A.L.); (Y.M.); (S.K.)
| | - Yan Meng
- State Key Laboratory for Turbulence and Complex Systems, Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing 100871, China; (Q.W.); (A.L.); (Y.M.); (S.K.)
| | - Chong Zhang
- Tencent Robotics X, Shenzhen 518057, China; (C.Z.); (W.C.); (S.Z.); (Y.L.)
| | - Wanchao Chi
- Tencent Robotics X, Shenzhen 518057, China; (C.Z.); (W.C.); (S.Z.); (Y.L.)
| | - Shenghao Zhang
- Tencent Robotics X, Shenzhen 518057, China; (C.Z.); (W.C.); (S.Z.); (Y.L.)
| | - Yuzhen Liu
- Tencent Robotics X, Shenzhen 518057, China; (C.Z.); (W.C.); (S.Z.); (Y.L.)
| | - Qiuguo Zhu
- Institute of Cyber-Systems and Control, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China;
| | - Shihan Kong
- State Key Laboratory for Turbulence and Complex Systems, Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing 100871, China; (Q.W.); (A.L.); (Y.M.); (S.K.)
| | - Junzhi Yu
- State Key Laboratory for Turbulence and Complex Systems, Department of Advanced Manufacturing and Robotics, College of Engineering, Peking University, Beijing 100871, China; (Q.W.); (A.L.); (Y.M.); (S.K.)
- Science and Technology on Integrated Information System Laboratory, Institute of Software, Chinese Academy of Sciences, Beijing 100190, China
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