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步态切换；欠驱动3D双足机器人；基于事件的反馈控制器；自适应控制律 1

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Function-oriented optimization design method for underactuated tendon-driven humanoid prosthetic hand

《机械工程前沿（英文）》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0696-0

摘要： The loss of hand functions in upper limb amputees severely restricts their mobility in daily life. Wearing a humanoid prosthetic hand would be an effective way of restoring lost hand functions. In a prosthetic hand design, replicating the natural and dexterous grasping functions with a few actuators remains a big challenge. In this study, a function-oriented optimization design (FOD) method is proposed for the design of a tendon-driven humanoid prosthetic hand. An optimization function of different functional conditions of full-phalanx contact, total contact force, and force isotropy was constructed based on the kinetostatic model of a prosthetic finger for the evaluation of grasping performance. Using a genetic algorithm, the optimal geometric parameters of the prosthetic finger could be determined for specific functional requirements. Optimal results reveal that the structure of the prosthetic finger is significantly different when designed for different functional requirements and grasping target sizes. A prosthetic finger was fabricated and tested with grasping experiments. The mean absolute percentage error between the theoretical value and the experimental result is less than 10%, demonstrating that the kinetostatic model of the prosthetic finger is effective and makes the FOD method possible. This study suggests that the FOD method enables the systematic evaluation of grasping performance for prosthetic hands in the design stage, which could improve the design efficiency and help prosthetic hands meet the design requirements.

关键词： function-oriented     tendon driven     prosthetic hand     optimization     humanoid     underactuated    

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Analysis and optimal design of an underactuated finger mechanism for LARM hand

Shuangji YAO, Marco CECCARELLI, Giuseppe CARBONE, Qiang ZHAN, Zhen LU

《机械工程前沿（英文）》 2011年 第6卷 第3期   页码 332-343 doi: 10.1007/s11465-011-0229-8

摘要：

This paper aims to present general design considerations and optimality criteria for underactuated mechanisms in finger designs. Design issues related to grasping task of robotic fingers are discussed. Performance characteristics are outlined as referring to several aspects of finger mechanisms. Optimality criteria of the finger performances are formulated after careful analysis. A general design algorithm is summarized and formulated as a suitable multi-objective optimization problem. A numerical case of an underactuated robot finger design for Laboratory of Robotics and Mechatronics (LARM) hand is illustrated with the aim to show the practical feasibility of the proposed concepts and computations.

关键词： robotic finger     underactuated mechanisms     design considerations    

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Gained switching-based fuzzy sliding mode control for a discrete-time underactuated robotic system with

Hui LI, Ruiqin LI, Jianwei ZHANG

《机械工程前沿（英文）》 2021年 第16卷 第2期   页码 353-362 doi: 10.1007/s11465-020-0620-4

摘要： This study proposes a gained switching-based discrete-time sliding mode control method to address the chattering issue in disturbed discrete-time systems, which suffer from various unknown uncertainties. Through the new structure of the designed reaching law, the proposed method can effectively increase the convergence speed while guaranteeing chattering-free control. The performance of controlling underactuated robotic systems can be further improved by the adoption of fuzzy logic to perform adaptive online hyper-parameter tuning. In addition, an underactuated robotic system with uncertainties is studied to validate the effectiveness of the proposed reaching law. Results reveal the dynamic performance and robustness of the proposed reaching law in the studied system and prove the proposed method’s superiority over other state-of-the-art methods.

关键词： sliding-mode control     robot control     discrete-time uncertain systems     fuzzy logic    

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Stability and agility: biped running over varied and unknown terrain

Yang YI,Zhi-yun LIN

《信息与电子工程前沿（英文）》 2015年 第16卷 第4期   页码 283-292 doi: 10.1631/FITEE.1400284

摘要： We tackle the problem of a biped running over varied and unknown terrain. Running is a necessary skill for a biped moving fast, but it increases the challenge of dynamic balance, especially when a biped is running on varied terrain without terrain information (due to the difficulty and cost of obtaining the terrain information in a timely manner). To address this issue, a new dynamic indicator called the sustainable running criterion is developed. The main idea is to sustain a running motion without falling by maintaining the system states within a running-feasible set, instead of running on a periodic limit cycle gait in the traditional way. To meet the precondition of the criterion, the angular moment about the center of gravity (COG) is restrained close to zero at the end of the stance phase. Then to ensure a small state jump at touchdown on the unknown terrain, the velocity of the swing foot is restrained within a specific range at the end of the flight phase. Finally, the position and velocity of the COG are driven into the running-feasible set. A five-link biped with underactuated point foot is considered in simulations. It is able to run over upward and downward terrain with a height difference of 0.15 m, which shows the effectiveness of our control scheme.

关键词： Underactuated running biped     Dynamic balance     Varied and unknown terrain    

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欠驱动3D双足机器人步态切换控制策略 Research Articles

Hai-hui YUAN, Yi-min GE, Chun-biao GAN

《信息与电子工程前沿（英文）》 2019年 第20卷 第8期   页码 1026-1035 doi: 10.1631/FITEE.1800206

摘要： 由于应用前景广泛，双足机器人研究引起国内外学者重点关注。实际中，双足机器人常需进行步态切换以实现灵活步行。本文针对一个五杆欠驱动3D双足机器人步态切换问题，提出一种基于分层控制的切换控制策略。该策略包括切换控制器设计以及基于事件的反馈控制器设计。所设计的基于事件反馈控制器会在每一步对反馈增益进行自适应更新，而所设计的切换控制器将引导机器人从当前步态到达目标步态的邻域范围以实现平滑收敛。与以往研究相比，本文采用参数优化法设计切换控制器参数，确保机器人在步态切换过程中满足物理约束条件。最后，为验证所提控制策略的有效性，针对欠驱动3D双足机器人进行了数值仿真验证。

关键词： 步态切换；欠驱动3D双足机器人；基于事件的反馈控制器；自适应控制律    

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标题 作者 时间 类型 操作

Function-oriented optimization design method for underactuated tendon-driven humanoid prosthetic hand

期刊论文

Analysis and optimal design of an underactuated finger mechanism for LARM hand

Shuangji YAO, Marco CECCARELLI, Giuseppe CARBONE, Qiang ZHAN, Zhen LU

期刊论文

Gained switching-based fuzzy sliding mode control for a discrete-time underactuated robotic system with

Hui LI, Ruiqin LI, Jianwei ZHANG

期刊论文

Stability and agility: biped running over varied and unknown terrain

Yang YI,Zhi-yun LIN

期刊论文

欠驱动3D双足机器人步态切换控制策略

Hai-hui YUAN, Yi-min GE, Chun-biao GAN

期刊论文