The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We propose an approach that combines human demonstrated posture-control skill defined by the motion in the lower limb joints with an inverse kinematics solution of an arbitrary hand motion. The posture-control skill for humanoid robot was obtained through the human-in-the-loop teaching approach. The collected data during the teaching phase was used to approximate functional relation between the state...
In this paper, a Genetic Algorithm is used to solve for the optimization problem of a quadruped rover, which is developed based on a two-dimensional model of a domestic cat. The rover's gait, pose and control parameters are optimized for two separate objectives. First, the energy consumption through applied joint torque is minimized for fixed thrust speeds. Secondly, the rover's thrust speed is maximized...
This paper presents a lower limb rehabilitation robot based on free gait and virtual reality, which is intended to improve therapeutic efficacy. With the help of the robot, patients with motor disabilities can walk with free gait in a virtual environment and choose between passive and active training modes. So the impaired limbs can get appropriate exercise in all clinical stages and the motivation...
A robotic exoskeleton system of lower extremity controlled by central pattern generators (CPGs) was developed for physical rehabilitation of paraplegic patients. The exoskeleton system has two degrees of freedom for each limb to assist motion of hip and knee joints with help of a body weight support device. Mechanical design of the exoskeleton considering ergonomics adopted some regulation mechanisms...
This paper develops a hemiplegic walking functional recovery training device. This paper proposes a power assist mechanism, hip joint and knee joint motion adaptation mechanism based on the movement of the joints of the human body, mechanism corresponding to the individual differences in body shape, and mechanism to prevent side-overturning. The designed prototype of the device, then the effectiveness...
Because of the limited space and enormous forces in the human foot, researchers generally simplified the foot as a rigid body in the development of lower extremity exoskeletons and biped humanoid robots, which led to unsatisfying performance on flexibility and auto-stability. In this paper, we propose a novel parallel mechanism with seven degrees of freedom (DOF) to realize the main possible movements...
The design of the LEESD, a new exoskeleton for old people and patients, is presented in this paper. With one active degree of freedom (DOF) and two passive degrees of freedom, the LEESD can realize human walking gait. The hip joints and knee joints of the LEESD are directly driven by four-bar linkages and all these four-bar linkages are driven by merely one brushless DC motor which rotates at a constant...
This paper presents a modified gait generation method based on height compensation of center of mass (HCCOM) for biped humanoid robots. The method combines natural gait plan (NGP) and 3-D linear inverted pendulum model (3D-LIPM). By analyzing the human natural gait, the HCCOM considers the effect of swinging leg for COM height, so the hip height is no longer fixed and re-planned as a periodic movement...
Lower extremity exoskeletons are intelligent wearable robots that integrate human intelligence with the strength of humanoid robots. Recently, lower extremity exoskeletons have been developed for rehabilitation and assistance of paralysis patients. This paper presents design of a novel anthropomorphic lower extremity exoskeleton with compatible hip joints and knee joints that help paralysis patients...
Two-Step Test is now widely used to evaluate the locomotion ability of human in Japanese biomechanical clinical hospitals. It is a test in which Two-Step Value is calculated by dividing a subject's height by the maximum distance of his/her two steps of walking. The test was developed by Hirano and Muranaga in 2003 to conveniently predict human's walking ability and is shown to have high relations...
A wearable gait analysis system has been developed for ambulatory measurement of gait in long-term experiments and daily life applications. Based on the measurement results of the developed system in a dynamic validation experiment, we trained neural networks for the estimation of joint angle, joint force, and joint moment using the ground reaction forces (GRFs) and moments in the gait analysis. These...
Specific walking velocity, stability and energy consumption (i.e. walking characteristics) can be obtained by adjusting control parameters of complaint actuation which is essential for a passive walking robot to make full use of its own parameters to walk. In this paper, the series elastic actuator is used as the complaint actuator to adjust the walking characteristics. A passive dynamic walking model...
The study is to establish a precise three-dimensional (3D) finite element model (FEM) of the hip joints and to validate its accuracy for the application to the research on biomechanics. The right hip joint of a volunteer was scanned by computed tomography (CT) and magnetic resonance imaging (MRI). The resulting sectional images were input into MIMICS10.1 and ANSYS14.0 to generate 3D FEM of hip joints...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.