Motoaki Hiraga, Daichi Morimoto, Y. Katada, K. Ohkura
{"title":"When Less Is More in Embodied Evolution: Robotic Swarms Have Better Evolvability with Constrained Communication","authors":"Motoaki Hiraga, Daichi Morimoto, Y. Katada, K. Ohkura","doi":"10.20965/jrm.2023.p0988","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0988","url":null,"abstract":"Embodied evolution is an evolutionary robotics approach that implements an evolutionary algorithm over a population of robots and evolves while the robots perform their tasks. In embodied evolution, robots send and receive genomes from their neighbors and generate an offspring genome from the exchanged genomes. This study focused on the effects of the communication range for exchanging genomes on the evolvability of embodied evolution. Experiments were conducted using computer simulations, where robot controllers were evolved during a two-target navigation task. The results of the experiments showed that the robotic swarm could achieve better performance by reducing the communication range for exchanging genomes.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116896070","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":"Swarm Search Algorithm Based on Chemotactic Behaviors of Caenorhabditis elegans Nematodes","authors":"Seiya Nomoto, Y. Hattori, D. Kurabayashi","doi":"10.20965/jrm.2023.p0911","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0911","url":null,"abstract":"We investigated the chemotactic behaviors of the nematode Caenorhabditis elegans, whose individuals have only 302 neurons but might sense the density of other individuals. As an individual detects areas with high concentration of a target chemical, mimicking their behavior may improve the exploration efficiency of autonomous distributed agents with limited sensing area and no direct communication with others. Inspired by this behavior, we experimentally determined the relationship between the density of individuals and probability of rapid turns to develop a search algorithm. We found a parameter set of “elite” individuals that achieved a high similarity of individual distributions with respect to a chemical gradient. Then, we implemented a motion selection algorithm that reflects the observation results so that an autonomous distributed agent, which has limited sensing range, achieves effective searching in a multi-peak environment. We simulated autonomous agents and applied the parameter sets obtained from elite, inferior, and single individuals. Through verifications using various benchmark potential functions, we concluded that the parameters of the elite group improved the search efficiency.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114780755","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}
Yasuhiro Sugimoto, Keisuke Naniwa, D. Nakanishi, K. Osuka
{"title":"Tension Control of a McKibben Pneumatic Actuator Using a Dynamic Quantizer","authors":"Yasuhiro Sugimoto, Keisuke Naniwa, D. Nakanishi, K. Osuka","doi":"10.20965/jrm.2023.p1038","DOIUrl":"https://doi.org/10.20965/jrm.2023.p1038","url":null,"abstract":"A McKibben-type pneumatic actuator (MPA) is a soft actuator that generates tension by inflating a rubber tube with compressed air. Electropneumatic regulators are typically employed to regulate air pressure in MPAs. However, they are normally large in size and expensive, which are significant obstacles to the autonomous decentralized control of many MPAs in achieving various robot motions. In this study, the exerted tension of the MPA was controlled using a small solenoid valve that could be opened and closed instead of an electropneumatic regulator. To achieve this tension control, we proposed the use of a dynamic quantizer that converts continuous pressure values into discrete pressure values and controls the solenoid valve based on the discretized pressure values. The proposed method was applied to feedforward and feedback control of the exerted MPA tension under isometric conditions. Experiments on an actual device with a small solenoid valve demonstrated the effectiveness of the proposed method based on a dynamic quantizer.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123991804","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":"A Stepper Motor-Powered Lower Limb Exoskeleton with Multiple Assistance Functions for Daily Use by the Elderly","authors":"Yifan Fang, Bingkai Hou, Xiuyuan Wu, Yuntian Wang, Keisuke Osawa, Eiichirou Tanaka","doi":"10.20965/jrm.2023.p0601","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0601","url":null,"abstract":"With the increase in the aging population, the demand for healthcare devices has increased. Among the aging population, many experience joint pain, muscle weakness, or poor balance. Without external help, such persons may have difficulty walking, fall easily, or experience poor quality of life. To provide this category of the population with the opportunity to exercise and walk safely and take care of themselves in daily activities, a stepper motor-powered walking assistive device is proposed and built. The device enables users with different heights to walk in suitable gaits; assists users to stand up, sit down, and step up or down stairs; automatically detects user’s intention using pressure sensors and potentiometers; and can be used outdoors for long periods. In this study, the effectiveness of the device is verified using muscle-activity measurements.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"40 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":"122456068","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}
Takeshi Ikeda, Yuki Matsutani, Masanori Sato, S. Furuno, F. Nagata
{"title":"Development of Flexion Posture Formation Mechanism in Wearable Type of Flexor Tendon Rehabilitation Equipment","authors":"Takeshi Ikeda, Yuki Matsutani, Masanori Sato, S. Furuno, F. Nagata","doi":"10.20965/jrm.2023.p0577","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0577","url":null,"abstract":"Rehabilitation robots and rehabilitation braces are in demand, as they aid in reducing a patient’s need for therapist’s attendance and guidance during therapy. This study focuses on the bending of fingers under the tension of the fingertips using clinical equipment and demonstrates the development of a small and versatile rehabilitation brace.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"35 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":"128755550","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}
J. Kawata, J. Morimoto, Y. Kaji, Mineo Higuchi, S. Fujisawa
{"title":"Development of a Gaze-Driven Electric Wheelchair with 360° Camera and Novel Gaze Interface","authors":"J. Kawata, J. Morimoto, Y. Kaji, Mineo Higuchi, S. Fujisawa","doi":"10.20965/jrm.2023.p0743","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0743","url":null,"abstract":"A novel gaze-based user interface (UI) is proposed for the remote control of robots and electric wheelchairs. A task-based experiment showed that this UI is more suitable for remote control than a conventional interface. The UI was applied to the control of a commercially available low-cost electric wheelchair. By using a 360° camera and an eye tracker that can be used outdoors, the visibility of obstacles and the usability of the gaze-driven electric wheelchair were greatly improved. The gaze-driven electric wheelchair exhibited good performance in a task-based evaluation experiment.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"40 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":"128999266","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}
Koki Honda, Y. Nakashima, Chen Hua, Motoji Yamamoto
{"title":"Influence of Combined Vibration and Electrical Stimulation on Latency of Kinesthetic Illusion","authors":"Koki Honda, Y. Nakashima, Chen Hua, Motoji Yamamoto","doi":"10.20965/jrm.2023.p0823","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0823","url":null,"abstract":"The application of vibration stimulation to muscles, via the skin surface, can generate the sensation of movement, when actually there is no motion. This phenomenon is called kinesthetic illusion. Recently, in the fields of rehabilitation and virtual-reality technology, research has been conducted to utilize kinesthetic illusions to feel body movements, when there are none. To apply kinesthetic illusions in the above fields, it is necessary to develop techniques to improve the occurrence rates of the kinesthetic illusions and shorten the latency, which is the time lag from the onset of stimulation to the occurrence of the illusion. In a previous study, the authors reported that the occurrence rate of kinesthetic illusion could be improved by simultaneously applying vibration and electrical stimulations to the antagonistic muscles. In this study, the influence of this technique on the latency of the generated kinesthetic illusion is investigated by applying a combination of vibration and electrical stimulations. Three different electrical-stimulation voltages are used in the combined stimulation to induce the kinesthetic illusion, and the latency is studied for each voltage condition and the vibration-only condition. The effects of the voltage change on latency are evaluated from a regression analysis performed using the generalized linear mixed model. The results suggest that the change in the electrical stimulation voltage can shorten the latency of kinesthetic illusion.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"35 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":"129319607","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":"Device Design of Ankle Joint Stretching System Controlled by the Healthy Side Ankle Joint Movement for Self-Rehabilitation","authors":"H. Toda, H. Kawamoto","doi":"10.20965/jrm.2023.p0556","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0556","url":null,"abstract":"An ankle joint stretching device controlled by healthy-side ankle movements was developed for self-rehabilitation. Physical therapists treat their patients to prevent a subject ankle joint’s contracture and improve their walking function. However, sufficient rehabilitation therapy cannot be performed because of the labor demands of ankle joint rehabilitation. There has long been a demand for a self-rehabilitation system to reduce the amount of labor required, with the rehabilitation system operated by a physical therapist using a machine. Self-rehabilitation has not yet been realized. By stretching the affected ankle through the movement of the ankle on the healthy side, a self-rehabilitation device that can be used according to the will of the patient can be developed. An experiment confirmed that the device can realize affected-side ankle joint stretching by moving a foot plate connected to a linear actuator using the angle of the healthy-side ankle joint as a trigger. Ankle joint rotation angles of the affected and healthy sides were measured using two acceleration sensors. Compared with the previously used button-push-type control, healthy-side control can realize a smooth and stable affected-side sole-pushing procedure. The proposed system, which does not require operation by a physical therapist during treatment, makes self-rehabilitation of the ankle joint possible.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"04 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":"129919799","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}
Naoki Ohshima, Katsuya Iwasaki, Ryosuke Mayumi, Komei Hasegawa, M. Okada
{"title":"Pocketable-Bones: Self-Augment Mobile Robot Mediating our Sociality","authors":"Naoki Ohshima, Katsuya Iwasaki, Ryosuke Mayumi, Komei Hasegawa, M. Okada","doi":"10.20965/jrm.2023.p0723","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0723","url":null,"abstract":"Discussions on human-robot interactions abound in the fields of human-agent interaction and human-robot interaction. Although studies on communication through conversations and physical actions have been conducted, many of these studies focus on robot gaze while neglecting human gaze. In this study, we developed Pocketable-Bones, a mobile robot that can move with the human gaze in mind. This robot can fit in a breast pocket and follows and turns in the same direction a person faces. Notably, we have been investigating the realization of joint gazing in which two persons share interests and concerns through gazing. This study’s experiment results showed that Pocketable-Bones’ gazing behaviors satisfied the components of self-determination theory in well-being, notably autonomy, competence, and relationship.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"6 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":"130061256","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":"A Human-Centered and Adaptive Robotic System Using Deep Learning and Adaptive Predictive Controllers","authors":"Sari Toyoguchi, Enrique Coronado, G. Venture","doi":"10.20965/jrm.2023.p0834","DOIUrl":"https://doi.org/10.20965/jrm.2023.p0834","url":null,"abstract":"The rise of single-person households coupled with a drop in social interaction due to the coronavirus disease 2019 (COVID-19) pandemic is triggering a loneliness pandemic. This social issue is producing mental health conditions (e.g., depression and stress) not only in the elderly population but also in young adults. In this context, social robots emerge as human-centered robotics technology that can potentially reduce mental health distress produced by social isolation. However, current robotics systems still do not reach a sufficient communication level to produce an effective coexistence with humans. This paper contributes to the ongoing efforts to produce a more seamless human-robot interaction. For this, we present a novel cognitive architecture that uses (i) deep learning methods for mood recognition from visual and voice modalities, (ii) personality and mood models for adaptation of robot behaviors, and (iii) adaptive generalized predictive controllers (AGPC) to produce suitable robot reactions. Experimental results indicate that our proposed system influenced people’s moods, potentially reducing stress levels during human-robot interaction.","PeriodicalId":178614,"journal":{"name":"J. Robotics Mechatronics","volume":"14 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":"134222372","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}