Article
Engineering, Electrical & Electronic
Long Wang, Xiaoling Li, Zhangyi Chen, Zhipeng Sun, Jingyi Xue
Summary: This study proposes an electrode shift correction method and an online updating framework to improve the performance and robustness of myoelectric recognition models. Results from offline and online experiments demonstrate the effectiveness of the proposed methods and their potential for practical applications.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Emmanuel Ayodele, Syed Ali Raza Zaidi, Jane Scott, Zhiqiang Zhang, Ali Hayajneh, Samson Shittu, Des McLernon
Summary: The rehabilitation of stroke survivors can be expedited by using an exoskeleton that allows both hands to move in synergy. In this study, a weft knit data glove is introduced, eliminating the need for bulky external attachments. The glove, made using WholeGarment technology, features sensors and a support structure manufactured in the same fabrication process. Additionally, an electromechanical model of the sensors is presented alongside experimental validation, and machine learning algorithms are applied for classifying hand postures based on sensor data histograms.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Biomedical
Ruochen Hu, Xiang Chen, Haotian Zhang, Xu Zhang, Xun Chen
Summary: This study proposes a novel myoelectric control scheme that supports gesture recognition and muscle force estimation. The scheme utilizes multi-task learning technique to achieve synchronous prediction of gesture category and instantaneous force. A post-processing algorithm based on threshold method is used to improve the accuracy of gesture recognition. Experimental results show that the proposed scheme reduces the overall gesture classification error and meets the real-time requirement of EMG control system.
IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING
(2022)
Article
Robotics
Hwayeong Jeong, Jirou Feng, Jung Kim
Summary: This paper introduces a 2.5D laser cutting method for customized sensor fabrication. The customized textile-based sensor provides high wearing comfort and stable signal quality. The performance of the sensor is evaluated experimentally and integrated into garments for leg and arm, demonstrating consistent performance during leg movement and hand gesture recognition.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Kasidid Chansaengsri, Benchapol Tunhoo, Korakot Onlaor, Thutiyaporn Thiwawong
Summary: This research developed conductive nanomaterial-based screen-printing inks for fabric electrodes compatible with electrocardiogram (ECG) to monitor vital signs and diagnose symptoms of illness. By optimizing the contents of polymer matrix, calcium carbonate additive filler, and conductive nanomaterials, the electrodes demonstrated high conductivity, stability, flexibility, and bending capability for wearable components. The fabricated electrodes, particularly those utilizing copper nanowires, showed promising resistivity and signal-to-noise ratio (SNR) values, making them suitable for sensitive biosignal detection during movement. Moreover, the electrodes could be used without excessive pressure or an electrolyte gel layer, addressing the challenges in developing portable devices.
IEEE SENSORS JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Ladan Eskandarian, Amirali Toossi, Farah Nassif, Sahar Golmohammadi Rostami, Siting Ni, Amin Mahnam, Milad Alizadeh Meghrazi, Wataru Takarada, Takeshi Kikutani, Hani E. Naguib
Summary: This paper proposes flexible, breathable, and washable dry textile electrodes made of conductive elastomeric filaments (CEFs) to address the limitations of wearables for continuous monitoring. The CEF electrodes are found to have comparable fidelity to gold standard gel electrodes and are resistant to repeated wash and dry cycles. Smart undergarments with these textile electrodes successfully perform long-term continuous ECG monitoring.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Engineering, Biomedical
Philip P. Vu, Alex K. Vaskov, Christina Lee, Ritvik R. Jillala, Dylan M. Wallace, Alicia J. Davis, Theodore A. Kung, Stephen W. P. Kemp, Deanna H. Gates, Cynthia A. Chestek, Paul S. Cederna
Summary: By implanting electrodes in RPNI and muscles, stable and high amplitude signals can be obtained for long-term prosthetic control. The signal quality remained consistent for up to 276 and 1054 days in P1 and P2 respectively. P2 maintained high accuracy for real-time prosthetic control for 604 days and performed a real-world multi-sequence coffee task with 99% accuracy for 611 days.
JOURNAL OF NEURAL ENGINEERING
(2023)
Article
Chemistry, Analytical
Bulcha Belay Etana, Benny Malengier, Timothy Kwa, Janarthanan Krishnamoorthy, Lieva Van Langenhove
Summary: The effect of load and holding contact pressure on embroidered textile electrodes used as surface electromyography sensors was studied. The contact reliability and repeatability were improved by controlling the contact pressure and load. The quantitative analysis showed that the signal quality of the textile electrodes was comparable to that of traditional electrodes.
Article
Materials Science, Paper & Wood
Chunyin Lu, Jianhui Qiu, Manxi Sun, Qifan Liu, Eiichi Sakai, Guohong Zhang
Summary: Ionic conductive hydrogels crosslinked with carboxymethyl cellulose and phytic acid exhibit favorable mechanical performance and ionic conductivity, leading to remarkable sensor performance with a broad strain window. The approach allows for large-area, low-cost fabrication, showing great potential for sensing and flexible devices.
Article
Chemistry, Analytical
Shuo Wang, Jingjing Zheng, Bin Zheng, Xianta Jiang
Summary: Pattern recognition using sEMG for prosthesis control has been a topic of interest. Current methods rely on sEMG signals during firmly grasped period, but this may cause delay. By studying the changes in grasp classification accuracy during reaching and grasping, we found a period before firmly grasped that can be used for early grasp classification with reduced delay.
Article
Chemistry, Analytical
Yanchao Wang, Ye Tian, Haotian She, Yinlai Jiang, Hiroshi Yokoi, Yunhui Liu
Summary: In this paper, a prosthetic bionic hand system is developed using a linear discriminant analysis algorithm (LDA) to achieve adaptive gripping. By recognizing surface electromechanical signals (sEMG) and obtaining people's action intention in advance, the system can provide timely control instructions to assist people in grasping objects. The experimental results show that the system performs well for disabilities to grasp objects of different sizes and shapes adaptively.
Article
Engineering, Electrical & Electronic
Xuhui Hu, Hong Zeng, Aiguo Song, Dapeng Chen
Summary: This study aims to improve the robustness of myoelectric hand motion decoding by optimizing model structure and transferring generalized features, and experimental results show that the TC model has advantages in extracting muscle synergy features.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Biomedical
Suguru Kanoga, Takayuki Hoshino, Hideki Asoh
Summary: To improve the initial accuracy of wearable sensor-driven human interfaces, a subject-transfer framework based on multiple distance measures is proposed in this study. By minimizing the distance between the data distributions of the target and the source, subject transfer can be performed using only unlabeled calibration data. The framework has been tested on surface electromyogram databases and showed improved pattern recognition accuracy compared to classifiers constructed from randomly selected source subject data.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2022)
Article
Biochemistry & Molecular Biology
Jianbo Huang, Xin Xu, Feng Xu, Jun Yang, Mahshid Kharaziha, Fubao Sun, Xueming Zhang
Summary: Researchers have developed a novel gel-based wearable sensor that is resistant to freezing and drying. The sensor exhibits excellent strength, high sensitivity, and self-adhesion. It also shows outstanding environmental resistance and can be stored for a long time in a wide range of temperatures. This research has significant implications for the fabrication and application of high-sensitive and stable gel sensors.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Engineering, Biomedical
Hanadi Abbas Jaber, Mofeed Turky Rashid, Luigi Fortuna
Summary: The study integrates high-density surface electromyography (HD-sEMG) electrodes technology with robust hybrid spatial features to improve the performance of myoelectric prostheses. Proposed spatial features and SVM classifier evaluation demonstrate the significant impact of robust spatial features on classification accuracy.
BIOMEDICAL SIGNAL PROCESSING AND CONTROL
(2021)
Article
Chemistry, Multidisciplinary
Wooseok Ryu, Youngjin Choi, Yong Je Choi, Sungon Lee
APPLIED SCIENCES-BASEL
(2020)
Article
Engineering, Mechanical
Dukchan Yoon, Long Kang, Sajjad Manzoor, Youngjin Choi
Summary: This article discusses the kinematic analysis and modification of a wrist mechanism of the DLR robot arm to enhance its range of motion, reduce parasitic motion, and achieve decoupled output motion. Through the development of a flexible hinge, comparison of rotational performance, and evaluation of workspace quality, the performance of the mechanism was successfully improved.
JOURNAL OF MECHANICAL DESIGN
(2021)
Article
Chemistry, Analytical
Seulah Lee, Yuna Choi, Minchang Sung, Jihyun Bae, Youngjin Choi
Summary: A knitted glove integrated with strain sensors for hand gestures recognition was developed. The experimental results demonstrated the effectiveness of the glove, achieving high accuracy in gesture recognition and showing the advantage of a simple manufacturing process.
Article
Robotics
Geon Lee, Geun Young Hong, Youngjin Choi
Summary: This letter proposes a one-degree-of-freedom virtual rolling-contact joint for the prosthetic wrist, which is based on the concept of tensegrity structure and mimics the structure of the human wrist. The inherent compliant features of the proposed wrist have been validated through experiments.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2021)
Correction
Materials Science, Textiles
Yewon Song, Seulah Lee, Yuna Choi, Sora Han, Hyuna Won, Tae-Hyun Sung, Youngjin Choi, Jihyun Bae
Summary: An updated version of this paper has been published and can be accessed through the original article.
FASHION AND TEXTILES
(2021)
Article
Robotics
Dukchan Yoon, Youngjin Choi
Summary: The underactuated gripper features a four-bar linkage mechanism, capable of robust gripping and fine manipulation in various environments. Simulations and experiments validate the designed directions and performance, demonstrating the feasibility and effectiveness of the gripper design.
IEEE TRANSACTIONS ON ROBOTICS
(2021)
Article
Engineering, Mechanical
Lengxue Li, Sunhong Kim, Junho Park, Youngjin Choi, Qiang Lu, Dongliang Peng
Summary: This paper proposes a tensegrity structure inspired by the ligamentous structure of the shoulder, which can simulate the motion range of the human shoulder joint and has the advantages of flexibility and lightweight design.
JOURNAL OF MECHANISMS AND ROBOTICS-TRANSACTIONS OF THE ASME
(2022)
Article
Engineering, Electrical & Electronic
Yuna Choi, Seulah Lee, Minchang Sung, Junho Park, Sungmin Kim, Youngjin Choi
Summary: This paper presents a prosthetic system based on EMG-FMG with vibrational feedback method for bio-feedback control, which was experimentally verified to improve the prosthesis performance.
IEEE SENSORS JOURNAL
(2021)
Article
Automation & Control Systems
Babar Jamil, Youngjin Choi
Summary: This article presents a new sensing method for pneumatic artificial muscle actuators, utilizing soft optical waveguides designed to measure contraction and force under loaded conditions. The proposed method allows for highly sensitive actuator systems with linear contraction sensing, and the sensorized PAMs are capable of working in high-pressure applications with repeated use without significant degradation in signal quality. Characterization and validation of this method are conducted through the plotting and modeling of characteristic curves for two PAM actuators, with control validation provided by feedback from measured sensor data to the controller.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2021)
Article
Robotics
Babar Jamil, Gyeongjae Yoo, Youngjin Choi, Hugo Rodrigue
Summary: This study presents a sensorized soft pneumatic gripper using hybrid optical fibers to measure bending deformation and contact force. By utilizing rigid optical fibers for signal transmission, electronic components are placed outside of the gripper, ensuring non-conductive and non-magnetic properties of the gripper and nearby components.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2021)
Article
Automation & Control Systems
Qiang Lu, Qing-Long Han, Dongliang Peng, Youngjin Choi
Summary: This article presents a method for electromagnetic source localization using an evolutionary particle filter. The filter reduces the number of particles and improves particle diversity. Based on estimated positions, the position and velocity of a virtual leader are determined. An event-based fixed-time consensus control approach is proposed to achieve consensus between robots and the virtual leader while minimizing resource consumption.
IEEE TRANSACTIONS ON CYBERNETICS
(2022)
Article
Automation & Control Systems
Babar Jamil, Gyeongjae Yoo, Youngjin Choi, Hugo Rodrigue
Summary: This article presents the design of a sensorized hybrid hard-soft articulated joint, which combines rigid motion with soft actuation. The joint is capable of following a given trajectory and rejecting disturbances while being controlled in a closed-loop manner. The design is extended to a two degrees of freedom joint and integrated with a rigid base joint to form a 6-DOFs hybrid robotic manipulator for use in small retail businesses.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Biomedical
Dukchan Yoon, Minsang Seo, Youngjin Choi
Summary: This article proposes a new forearm model that reflects the rotation of the ulna by changing the joint types. The model has good kinematic characteristics and can describe the overall movement.
IEEE TRANSACTIONS ON MEDICAL ROBOTICS AND BIONICS
(2022)
Article
Health Care Sciences & Services
Naan Ju, Kyu-Hye Lee, Myoung-Ok Kim, Youngjin Choi
Summary: Despite recent advances in technology and medicine, the number of patients undergoing amputation continues to rise. Prosthetic users commonly discontinue use due to discomfort and design/function complaints, with color and design being key considerations in prosthetic selection. Respondents expressed a need for prosthetics tailored to specific activities and situations, indicating challenges in daily tasks without adequate prosthetic functions.
