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With the demand of active prosthesis continuing to rise, the necessity of developing stable humanoid robots and intelligent leg prosthesis becomes more and more important. This paper presents a closed-loop position servo system of the powered prosthesis, which is designed according to the moving feature of human leg, and consists of the position, velocity and current feedback. Based on bionics principle,...
Backdrivability is a keyword with rising importance, not only in humanoid robots, but also to wearable robots. Power assist robots, namely exoskeletons are expected to provide mobility and independence to elderly and people with disability. In such robots, without backdrivability, error between human and robot motion can be painful; sometimes dangerous. In this research, we apply a type of hydraulic...
In our current research, we are developing a robotic walker system with standing, walking and seating assistance function. Our developing system is based on a walker which is popular assistance device for aged person in normal daily life and realizes the standing and seating motion using the support pad which is actuated by the novel assistance manipulator mechanism with four parallel linkages. In...
A prototype for a walking assistance apparatus for the elderly or motor palsy patients was developed, using a novel spatial parallel link mechanism. The flat steps of the apparatus move in parallel with the ground; the apparatus can support entire leg alignment (including soles) and assist; walking behavior at ankle, knee and hip joints simultaneously. By using a flexible link, constructed of stainless...
The inclusion of robotic systems in physiotherapy allows developing new solutions for the rehabilitation and support of disabled people. Our research addresses the core problem for the advancement of such applications: the availability of a human machine interface offering intuitive control of robotic devices. In this paper we present an EMG-driven model of the human lower limb based on that previously...
The authors are developing a knee joint robot as an educational tool for students becoming physical therapist (PT) or occupational therapist (OT). The robot can simulate some problems of a knee joint, such as range of motion trouble, contracture, rigidity, spasticity and so on. The robot has a knee joint mechanism to realize not only flexion/extension movement but also inner/outer rotation movement,...
Anterior cruciate ligament (ACL) injuries have become more common in recent years as more young people participate in risky sporting activities. Most ACL injuries occur as a result of noncontact mechanisms. Previous in vitro studies of ACL strain have found significant increases in ACL strain primarily with anterior directed force on the tibia relative to the femur and with internal rotation and often...
Now more than ever, progresses in information technology applied to rehabilitation robotics give new hopes to people recovering from different kinds of diseases and injuries. Beside the standard application of EMG signals to analyze disabilities or to track progress in rehabilitation, more focus has been put on controlling robot arms and exoskeletons. In recent years, biomechanists have developed...
A new type of horizontal lower limbs rehabilitation robot based on parallel mechanism is developed according to the motion law of lower limbs and rehabilitation medicine theory, which is helpful for the disabled patients in lower limbs. It can help patients to do rehabilitation training of hips, knees and ankles. In order to ensure safety and comfort of affected limb in the course of training, the...
In rehabilitation system, the patient has an evolving feature on motor ability. This feature imposes an important constraint on designing of effective human-robot interaction architecture, which not only maintains training effectiveness but also ensures patient safety. In this paper, adaptive haptic interaction architecture is proposed, which utilize passive control for passive phase training and...
Intelligent bionic leg controlled by a micro processing unit is an advanced intelligent prosthesis. In order to provide an ideal test-bed for the development of intelligent bionic leg, a new pattern humanoid robot-biped robot with heterogeneous legs (BRHL) is proposed. The conception and research purpose of BRHL are expatiated. Based on human bioscience, bionic design of artificial knee joint is analyzed...
Current changes in aging demographics poses new challenges: people require to keep their quality of life even after circumstances that threatened their movement and function. This increases the demand for new physical rehabilitation facilities that go beyond the traditional patient-therapist, one-to-one rehabilitation sessions. Two promising solutions rely on virtual reality and on the development...
For femoral fracture reduction, we have developed a surgical robotic system. Indirect traction is employed in our system. Indirect traction in fracture reduction is a generally used surgical method for preventing complications such as bone splits caused by high stress on bones. For traction, a patientpsilas foot is gripped by a jig and pulled to the distal side. Indirect traction has the advantage...
This paper proposes a robotic walker system with standing and walking assistance function. Our system focuses on domestic use for aged person who needs nursing in their daily life. Our key ideas are two topics. The first topic is combination of standing assistance function and walking assistance function. In previous works, many assistance devices are specialized in only ldquostanding-up operationrdquo...
Virtual environments can make repetitive motor rehabilitation exercises more motivating and thereby more effective. We hypothesize that participation-dependent multimodal stimuli increase the patientpsilas activity as expressed through force exertion during robot-aided treadmill training. In a single case study with one patient (12 years old), we were able to show that active participation increased...
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