The objective of this work is to study the EMG signals based on hand motions for specified tasks, and different gripping conditions so as to identify patterns of EMG signals. This will allow therapists to identify weak muscles of patients with motor weakness, such as spinal cord injury (SCI) and post-stroke and concentrate on rehabilitation activities which can strengthen these specific muscles. At the same time, it is hoped that the analysis is able to provide useful data for objective and quantitative assessment towards control applications on the hand rehabilitation device, which is being developed. The analysis of the EMG signals for various hand muscles during functional motions and prehensile tasks has been carried out. The method to identify individual hand motions from EMG signals is described. The EMG signals associated to physical parameters are also illustrated in this paper. Finally, the preliminary works and future research are concluded.

Категория: Ищем научные статьи | 1 Комментарий »

We have been developing a wearable robot that directly and physically supports human movement. A ldquomuscle suitrdquo for the arm that will provide muscular support for the paralyzed or those otherwise unable to move unaided is one example. Whereas low back pain is one of the most serious issue for the manual worker and in this paper, we focus on developing the support system for anteversion posture support. In this paper, the concept and mechanical structure of the support system is shown. From the experimental result to keep anteversion posture with load indicates our system is very effective for keeping anteversion posture and it becomes clear that more than 60% reduction of muscular power is possible.

Категория: Ищем научные статьи | 1 Комментарий »

Dance notation systems, like music notes, enable documentation of symbolic representations of movement as signs on paper for individual analysis and interpretation. Today, dance notation systems operate within a digital environment in dance notation applications that facilitate the process of recording movement. The author argues that a key objective in the development of these applications should be to provide the user with an unambiguous method to record and represent movement. These applications offer varying functionality in their use of technology for the representation of movement and can be broadly defined in three different categories. Dance notation applications make up the first category — they help notate or record specific forms of movement using dance notation. Notation-based applications, the second category, include applications that use dance notation as a basis for their development. The last category, dance technology, consists of applications that use emerging technologies to record and visualize movement. While each application has a defined use, it’s important to consider how effective the technologies they employ are in successfully achieving their objectives. In this article, the author focuses on dance applications in these three categories. The author considers the limitations of existing technologies in their ability to effectively describe and record movement within a specific context.

Категория: Ищем научные статьи | 1 Комментарий »

The walking power assist leg (WPAL) is designed for normal human power augmentation during walking. WPAL tackles three fundamental problems. First, the architectural design is studied using ergonomics. Second, WPAL must understand the user motion intention. Then, the control algorithm is also investigated. In order to make WPAL work smoothly and provide power assist for user, we proposed a method based on multi-sensor data fusion to understand the user motion intention. And, a control method of pseudo-compliance is also proposed. We can adjust the coefficient of mass, damp and spring to change power assist supply for user during walking. Correlative experimental result shows the effectiveness of the control method.

Категория: Ищем научные статьи | Нет комментариев »

This paper proposes a control method for a power assist system which attenuates the load force. In the system, the question of how to select a power assist ratio is important. This ratio must be selected with consideration of the maximum torque of each actuator used in the system, otherwise the actuator saturation may occur and cause the lack of the manoeuvrability and instability. To avoid such saturation problems, we propose a new control method which, after dividing an operated load into gravity load and dynamic load, selects a power assist ratio for the dynamic by considering the remaining actuator torque after the ratio for the gravity load is determined basing on the operator’s capability. The control law is formulated for a single axis power assist system and the effectiveness of the method is confirmed by experiments

Категория: Ищем научные статьи | Нет комментариев »