T. Shinohara, Kota Oe, T. Akagi, S. Dohta, Feifei Cho, W. Kobayashi, S. Shimooka
{"title":"Variable Step Type Pneumatic Linear Stepping Actuator for Passive Exercise Device of Hip Joint","authors":"T. Shinohara, Kota Oe, T. Akagi, S. Dohta, Feifei Cho, W. Kobayashi, S. Shimooka","doi":"10.20965/jrm.2023.p0641","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0641","url":null,"abstract":"Because of the elderly society in Japan, a passive exercise device that can be used in homes or hospitals without assistance is desirable. In the device, a soft actuator that can move with both longer strokes and a larger force is useful. In the previous study, a pneumatic linear stepping actuator (PLSA) that can push and pull a flexible rod while changing the gripping position of a tube was developed. In this study, a variable step type PLSA is proposed and tested. Moreover, the development of a passive exercise device for the hip joint using three PLSAs and one connecter connected with three flexible rods and a knee supporter is described. The tracking position control of the knee supporter based on an analytical model is also described. The control system using developed actuators is also introduced.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"208 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125687190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Daigo Katayama, Kazuo Ishii, S. Yasukawa, Yuya Nishida, S. Nakadomari, Koichi Wada, Akane Befu, Chikako Yamada
{"title":"Grid Map Correction for Fall Risk Alert System Using Smartphone","authors":"Daigo Katayama, Kazuo Ishii, S. Yasukawa, Yuya Nishida, S. Nakadomari, Koichi Wada, Akane Befu, Chikako Yamada","doi":"10.20965/jrm.2023.p0867","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0867","url":null,"abstract":"In this work, we have incorporated an electronic travel aid (ETA) as a smartphone application that alerts fall risks to the visually impaired. The application detects negative obstacles, such as platform edges and stairs, and occlusion using a grid map including height information to estimate fall risk based on the distance from an area’s edge to the user, and the area ratio. Here, we describe a grid map correction method based on the surrounding conditions of each cell to avoid area misclassification. The smartphone application incorporating this correction method was verified in environments similar to station platforms by evaluating its usefulness, robustness against environmental changes, and stability as a smartphone application. The verification results showed that the correction method is, in fact, useful in actual environments and can be implemented as a smartphone application.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123948004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shohei Sugano, Kazushiro Tanimoto, Toshiki Kobayashi, Y. Ui
{"title":"Excretion Detection Systems with Gas Sensors - Development of Excretion Detection Device with Non-Suction Utilizing Floor Cushion -","authors":"Shohei Sugano, Kazushiro Tanimoto, Toshiki Kobayashi, Y. Ui","doi":"10.20965/jrm.2023.p0799","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0799","url":null,"abstract":"In this paper, we report the development and evaluation of an excretion detection device which is to be used with a cushion. Remarkably, the device does not require air suction and can be used during the daytime. The device can be placed on a chair or wheelchair and used whenever a cared person sits. Reflecting on the views of caregivers and the observations of the cared persons, the device was designed to be as thin and flexible as possible. In experiments to evaluate the response, it was confirmed to respond not only to simulated urine but also to actual excrement. From the results of the clinical experiments, the excretion detection model achieved an accuracy rate of 76%. Although this figure is close to the approximately 80% accuracy rate of an existing product H, it must be kept in mind that this accuracy rate is limited to urination owing to the limited training data in this study. These findings suggest that the device used with a cushion provides a valid means of excretion detection during daytime hours in a non-wearing and non-invasive manner, although its use is currently limited to urination.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133374000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Toward a Prosperous Future Where Humans and Robots Cooperate","authors":"Masayo Iwai, M. Haruna, T. Tanikawa","doi":"10.20965/jrm.2023.p0533","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0533","url":null,"abstract":"Based on the roadmap formulated by “Consortium for Human-Centric Manufacturing Innovation” (here-in after referred to as HCMI Consortium) of National Institute of Advanced Industrial Science and Technology, an industry-academia-government collaborative platform launched on April 10, 2019, this paper introduces initiatives and future prospects for human-centric robotics that collaborate with humans and human-in-the-loop cyber-physical system to support future industrial infrastructure for a sustainable and prosperous society. In particular, in cooperation with humans, it is important to understand the behavior of workers. For this purpose, it is important to have a fundamental technology that can represent models of human in cyber-physical systems and simulate the relationship between human and machines. Based on this fundamental technology, we are proceeding with demonstrations in various use cases.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133709408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of Noncircular Pulleys to Straight-Fiber-Type Pneumatic Artificial Muscle Manipulator","authors":"Rikuto Tanaka, Teppei Abe, H. Tomori","doi":"10.20965/jrm.2023.p0622","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0622","url":null,"abstract":"This study proposes a method for improving the performance of a manipulator driven by pneumatic artificial muscles. Although the straight-fiber-type pneumatic artificial muscle (SF-PAM), a kind of pneumatic artificial muscle, is lightweight and exhibits high contractile force and contraction percentage, its contractile force decreases as contraction increases. To compensate for the decrease in the SF-PAM contractile force, we developed a noncircular pulley and integrated it into the manipulator driven by a wire pulley mechanism. Because this noncircular pulley is designed in accordance with the output characteristics of SF-PAM, the contraction force of SF-PAM can be converted into manipulator torque efficiently. In addition, the radius of the noncircular pulley is expressed as a function, which can be incorporated into a numerical model for the manipulator’s controller. Subsequently, simulation and experimentation to verify the proposed method showed that, when using the same actuator, the manipulator with a noncircular pulley can optimize both output torque and range of motion better than that with a conventional circular pulley. However, a few differences between simulation results and experimental results were observed. These differences were caused by SF-PAM stretching which was not considered in the model. This drawback can be overcome by improving the SF-PAM and the numerical model in future studies. We believe that this study will provide designers of robots that coexist with humans with a high degree of freedom.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127561707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Sato, Michihiro Yoshida, T. Kusaka, Yusuke Suzuki, Takayuki Tanaka
{"title":"Musculoskeletal Model Capable of Reproducing Lumbar Extension Motion Strategy Based on the Equilibrium Point Hypothesis","authors":"M. Sato, Michihiro Yoshida, T. Kusaka, Yusuke Suzuki, Takayuki Tanaka","doi":"10.20965/jrm.2023.p0762","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0762","url":null,"abstract":"We considered the change in joint stiffness as a motion strategy in human lumbar extension movement. We developed a musculoskeletal model that can reproduce this motion strategy and attempted to clarify the individual characteristics and differences in motion strategy. This model reproduces changes in lumbar joint stiffness during movement by appropriately adjusting parameters such that they represent the motion strategy. Using this model, we identified parameters in lumbar extension exercises for six participants with differences in lumbar joint stiffness and examined changes in lumbar joint stiffness and motion strategies. The results showed that participants with similar changes in joint stiffness had commonalities in their motion strategies.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126403228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Development of a Human-Centric System Using an IoT-Based Socially Embedded Robot Partner","authors":"Jinseok Woo, Taiki Sato, Y. Ohyama","doi":"10.20965/jrm.2023.p0859","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0859","url":null,"abstract":"Recently, the increasing social isolation of the elderly has caused major social problems, such as loneliness and the progression of dementia. A human-centric system could be a solution to these problems and promote coexistence with humans. Therefore, we aimed to develop a robot system using smart devices, which are essential for the Internet of things (IoT) technology, to provide services, such as information support and monitoring. As the development and application of smart devices become more sophisticated, a hyperconnected society will finally be realized through the development of smart-device-centered robots and their connection to peripheral devices. A hyperconnected society is one in which people, things, and data are connected. Personal mobility is developing and converging with robotic technology to the point where a large mobile robot can board a person. These robot technologies can be connected to wireless networks to provide organically connected services. In the era of Society 5.0, the connection among smart devices, robot systems, and mobility technology is still developing and will be a new paradigm in the development of human-centric systems in the future. Therefore, this study introduces the creation of a human-centric system using a robot system and a mobility system based on the IoT. Finally, we present several examples of the effectiveness of the proposed system and discuss its applicability.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127215851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Nguyen, Abraham Monrroy Cano, M. Edahiro, Shinpei Kato
{"title":"GPU-Accelerated 3D Normal Distributions Transform","authors":"A. Nguyen, Abraham Monrroy Cano, M. Edahiro, Shinpei Kato","doi":"10.20965/jrm.2023.p0445","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0445","url":null,"abstract":"The three-dimensional (3D) normal distributions transform (NDT) is a popular scan registration method for 3D point cloud datasets. It has been widely used in sensor-based localization and mapping applications. However, the NDT cannot entirely utilize the computing power of modern many-core processors, such as graphics processing units (GPUs), because of the NDT’s linear nature. In this study, we investigated the use of NVIDIA’s GPUs and their programming platform called compute unified device architecture (CUDA) to accelerate the NDT algorithm. We proposed a design and implementation of our GPU-accelerated 3D NDT (GPU NDT). Our methods can achieve a speedup rate of up to 34 times, compared with the NDT implemented in the point cloud library (PCL).","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"729 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123044659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aoki Takanose, Kaito Kondo, Yuta Hoda, J. Meguro, K. Takeda
{"title":"Localization System for Vehicle Navigation Based on GNSS/IMU Using Time-Series Optimization with Road Gradient Constrain","authors":"Aoki Takanose, Kaito Kondo, Yuta Hoda, J. Meguro, K. Takeda","doi":"10.20965/jrm.2023.p0387","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0387","url":null,"abstract":"In this paper, we propose a GNSS/IMU localization system for mobile robots when wheel speed sensors cannot be attached. Highly accurate location information is required for autonomous navigation of mobile robots. A typical method of acquiring location information is to use a Kalman filter for position estimation. The Kalman filter is a maximum-likelihood estimation method that assumes normally distributed noise. However, non-normally distributed GNSS multipath noise that frequently occurs in urban environments causes the Kalman filter to break down, and degrades the estimation performance. Other GNSS/IMU localization methods capable of lane-level estimation in urban environments use wheel speed sensors, which are unsuitable for the present situation. In this study, we aim to improve the performance of lane-level localization by adding a vehicle speed estimation function to adapt the method to those requiring wheel speed sensors. The proposed method optimizes time-series data to accurately compensate for accelerometer bias errors and reduce GNSS multipath noise. The evaluation confirmed the effectiveness of the proposed method, with improved velocity and position estimation performance compared with the Kalman filter method.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122988019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Yaw-Rate Controller Tuning for Autonomous Driving: Virtual Internal Model Tuning Approach","authors":"Motoya Suzuki, S. Yahagi","doi":"10.20965/jrm.2023.p0308","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0308","url":null,"abstract":"Vehicle yaw-rate control is important for realizing autonomous driving. If the desired yaw-rate response is realized, good autonomous driving can be realized. The gain-scheduled controller should be designed because vehicle has time-variant properties. However, it is difficult to design gain-scheduled controller in the case where vehicle parameters are unknown. To solve this problem, we expand virtual internal model tuning (VIMT) so as to realize desired yaw-rate responses. VIMT can tune the feedback controller by using one-shot experiment data. The processing cost is extremely low because the controller parameter can be obtained by using least square methods. In this study, we verify the validity of the proposed method through vehicle simulator of TruckMaker.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116097632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}