A5040765370- Electric Motor Design and Analysis
- Stroke Rehabilitation and Recovery
- Magnetic Bearings and Levitation Dynamics
- Magnetic Properties and Applications
- Cerebral Palsy and Movement Disorders
- Prosthetics and Rehabilitation Robotics
- Spinal Cord Injury Research
- Muscle activation and electromyography studies
- Powder Metallurgy Techniques and Materials
- Induction Heating and Inverter Technology
- Metallic Glasses and Amorphous Alloys
- Metallurgy and Material Forming
- Metal Alloys Wear and Properties
- Balance, Gait, and Falls Prevention
- Magnetic Properties of Alloys
- Nerve Injury and Rehabilitation
- Advanced materials and composites
- Injection Molding Process and Properties
- Advanced Surface Polishing Techniques
- Advanced machining processes and optimization
- Superconducting Materials and Applications
- Tracheal and airway disorders
- Botulinum Toxin and Related Neurological Disorders
- Medical Research and Treatments
- Assistive Technology in Communication and Mobility
Sumitomo Electric Industries (Japan)
2015-2024
University of Tsukuba
2014-2023
Sumitomo Electric Industries (United States)
2011-2021
CF Industries Holdings (United States)
2021
University of Tsukuba Hospital
2015-2020
Mitsubishi Group (Japan)
2016
Tottori University
2016
National University of Kaohsiung
2016
Nippon Steel (Japan)
2005
Tokuyama (Japan)
2004
Here, we present a study on exoskeleton robot control based inter-limb locomotor synergies using method developed to target hemiparesis. The is and kinesiological information from the non-paretic leg walking aid cane generate motion patterns for assisted leg. synergy-based system was tested against an autonomous in five patients with hemiparesis varying abilities. Three of participants were able walk robot. Results these showed improved spatial symmetry ratio more consistent step length...
Dysphagia can cause serious challenges to both physical and mental health. Aspiration due dysphagia is a major health risk that could pneumonia even death. The videofluoroscopic swallow study (VFSS), which considered the gold standard for diagnosis of dysphagia, not widely available, expensive causes exposure radiation. screening tests used need be carried out by trained staff, evaluations are usually non-quantifiable. This paper investigates development Swallowscope, smartphone-based device...
In general, radial gap motors employing neodymium sintered permanent magnet (Nd PM) are used to achieve high torque density in many applications. However, the not suited a flat, disk-like shape because dead space, such as coil ends, occupies most of motor volume. Therefore, axial frequently for flat instead motors. Nd PM is well-known high-performance that has residual magnetic flux density, but eddy current loss easily occurs its conductivity. industrial applications, it difficult take...
In recent years, there has been growing demand for flat electrical machines in order to minimize system size while also maintaining high efficiency. general, axial flux (AFMs) are more suitable form than radial (RFMs). AFMs usually employ a soft magnetic composite (SMC) the stator core, and their efficiency can be improved by employing an SMC that low iron loss. However, this reduces average torque because is generally tradeoff relationship between loss permeability SMCs. This article,...
This paper proposes an axial-flux permanent magnet machine (AFPM) that uses a neodymium-bonded (Nd-bonded PM) and coreless rotor structure assesses how it performs in industrial applications requiring high efficiency low cost. The AFPM is able to achieve high-speed regions because its Nd-bonded PM can restrain eddy current loss. Additionally, the continuously function at rated operating point without cooling system, so expenses for one be eliminated. Hence, simultaneously low-cost mass...
This paper proposes a novel axial-flux permanent magnet machine (AFPM) employing ferrite magnets (PMs) and round copper wire. The proposed AFPM adopts rotor structure uses tooth-tips with suitable trapezoidal shape. These structures compensate for the low magnetomotive force of wire PMs, achieving high performance at cost. Additionally, compared an off-the-shelf radial-flux (RFPM) using Nd-sintered PMs rectangular wire, achieves same output power higher efficiency, despite Finally, prototype...
Background: Falls and fractures due to impaired balance in patients with Alzheimer's disease (AD) have an adverse effect on the clinical course of disease. Objective: To evaluate impairment AD from viewpoint vestibular functional impairment. Methods: The subjects were 12 pa tients AD, dementia-free elderly adults, younger adults. Vestibular function was assessed using a stepping test, caloric nystagmus, visual suppression (VS) test. Results: test abnormal 9 group. An not associated...
Context: Recently, locomotor training with robotic assistance has been found effective in treating spinal cord injury (SCI). Our case report examined using the suit hybrid assistive limb (HAL) a patient complete C4 quadriplegia due to chronic SCI. This is first examining HAL quadriplegia.Findings: The was 19-year-old man who dislocated C3/4 during judo 4 years previously. Following injury, he underwent posterior fusion but remained paralyzed despite rehabilitation. There muscle atrophy under...
Context: The hybrid assistive limb (HAL) is a wearable robot suit that assists in voluntary control of knee and hip joint motion by detecting bioelectric signals on the surface skin with high sensitivity. HAL has been reported to be effective for functional recovery motor impairments. However, few reports have revealed utility patients who undergone surgery thoracic ossification posterior longitudinal ligament (thoracic OPLL). Herein, we present postoperative OPLL patient showed remarkable...
Context: Spinal cord infarction (SCI) causes gait disturbance because of paresis, spasticity, and sensory the lower limbs. There is no effective medical treatment for SCI, conventional rehabilitation alone main approach to helping individuals work toward independent walking. The aim this study was evaluate effect using Hybrid Assistive Limb (HAL) on acute SCI.Findings: A 61-year-old female a 62-year-old male with incomplete paraplegia participated in study. Our participants received HAL 3–4...
Patients with complete paraplegia after spinal cord injury (SCI) are unable to stand or walk on their own. Standing exercise decreases the risk of decubitus ulcers, osteoporosis, and joint deformities in patients SCI. Conventional gait training for requires excessive upper limb usage weight bearing is difficult cases quadriplegia. The purpose this study was describe voluntary ambulation triggered by activity using Hybrid Assistive Limb® (HAL) quadri/paraplegia chronic Four (3 men, 1 woman)...
Cerebral palsy (CP) patients with spastic diplegia struggle to perform activities of daily life (ADL) using their upper arms. The single-joint-type Hybrid Assistive limb (HAL) for limbs is a new portable robot that can provide elbow motion support in accordance bioelectric activation patient's biceps and triceps brachii muscles. purpose this study assess the feasibility efficacy use HAL CP patients. Two were enrolled study. (Case 1: 19-years-old male, at Gross Motor Function Classification...
We hypothesized that a single-leg version of the Hybrid Assistive Limb (HAL) system could improve gait and physical function patients with hemiparesis following stroke. In this pilot study, we therefore compared efficacy HAL-based training conventional (CGT) in acute Patients admitted to participating university hospital were assigned HAL group, whereas those outside teaching hospitals under same rehabilitation program who did not use control group. Over 3 weeks, all participants completed...
Context: The hybrid assistive limb (HAL) (the wearable robot) can assist kinesis during voluntary control of hip and knee joint motion by detecting the wearer's bioelectric signals on surface their skin. purpose this study was to report walking ability following robot treatment in a patient with chronic myelopathy after surgery for cervical ossification posterior longitudinal ligament (OPLL). Findings: 66-year-old woman OPLL who able ambulate independently aid bilateral crutches. received...
Hemiparetic gait is a common condition after stroke which alters importantly the quality of life survivors. In recent years, several robotic interventions have been developed to support and enhance rehabilitation strategies for such population. The Hybrid Assistive Limb® (HAL) robot suit unique device able collect in real time bioelectric signals from patient voluntary gait. HAL has used before early stages showing improvement intervention. However, evaluation coordination not done yet....
Context: Patients with complete quadriplegia after high cervical spinal cord injury are fully dependent activities of daily living. Assistive technology can improve their quality life. We examined the use a hybrid assistive limb for single joints (HAL-SJ) in 19-year-old man C4 due to chronic restore function active elbow flexion. This is first report on HAL-SJ patient injury.Findings: The intervention each was administered 10 sessions. Clinical assessment using surface EMG conducted evaluate...
The purpose of this report was to describe the improvement in walking ability using Hybrid Assistive Limb® (HAL®) intervention case a patient with paraplegia after spinal cord injury whose condition deteriorated because dural arteriovenous fistula (SDAVF).A 48-year-old man started HAL® twice per week (total 10 sessions), his neurologic had plateaued from 3 6 months postoperatively for an SDAVF. During intervention, 10-m walk test (10MWT) without performed before and each session. An...
The adoption of prosthetic hands by children with congenital upper limb deficiency from a very early age has benefits in terms reducing prosthesis abandonment, improving body image, and mitigating developmental physiological complications that arise the underuse deficit arm. However, current hand prostheses present drawbacks make them not suitable for young children. This study investigates design requirements below-elbow using user-centered (UCD) approach. UCD puts child at center process,...
We developed Fe/FeSiAl soft magnetic powder cores (SMCs) for realizing the miniaturization and high efficiency of an electromagnetic conversion coil in high-frequency range (∼20 kHz). found that SMCs can be formed with a higher density under compaction pressure than pure-iron SMCs. These delivered saturation flux 1.7 T iron loss (W1/20k) 158 kW/m3. The proposed exhibited similar excellent characteristics even block shapes, which are closer to product shapes.
Herein we present the development of a novel Ankle Foot Orthosis for gait support people with foot-drop symptoms. The developed AFO uses an elastic link mechanism to brake ankle joint during initial contact, thus mitigating foot-slap, and integrated energy store-and-release toe lift in swing phase, toe-drag. This paper presents improvements braking-holding power over its previous version, torque-angle characteristics renewed link, pilot test one person symptoms verify proposed functions AFO.
Humans employ various control strategies to initiate and maintain bodily movement. In case that the normal gait function is impaired, exoskeleton robots provide motor assistance during therapy. While robotic system builds on kinematic functions, patient's voluntary efforts motion also contribute effectiveness of therapy process. However, it currently not well understood how initiation as a subjective capacity affects physiological level control. order understand functional nexus between...
In recent years, flat shape motors are desired for many industrial applications such as robot arm, automobiles and so on. Thus, this paper discusses axial gap which have advantage shape. general, high torque density with because of its wide air-gap area. Axial therefore used limited space like disk instead radial the most general motor. However, compared motors, acceleration is relatively lower larger moment inertia. paper, rotor structure to enhance proposed analyzed by 3D-FEA. addition,...