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In order to control human limb movements in neuro-prosthetic systems, a nonlinear, model-based control strategy for torque generation by antagonistic muscle pairs is presented. The controller based on exact linearization methods enables the tracking of reference joint torque profiles and the generation of pre-defined muscular co-contractions. The controller adjusts the desired recruitment levels λ...
This paper presents a framework of gait analysis for children with cerebral palsy (CP) using electromyography (EMG) and acceleration (ACC) signals. In this framework, ACC signals are firstly processed for stride cycle detection and segmentation, and then utilized to reveal kinematic information associated with gait abnormality, whereas the EMG signals are adopted to assess abnormal muscle activation...
The paper investigates the dynamic characteristics that shape human skills using the task-space methods found in robotics research. It is driven by the hypothesis that each subject's physiology can be reflected to the task dynamics using the operational space acceleration characteristics and that elite performers achieve the optimum transmission from their available muscle induced torque capacity...
An analytical procedure based on capillary GC-MS was developed for the quantification and characterization of 2, 4-dimethylaniline and amitraz in fish muscle. It contained an n-hexane/methanol extraction step using accelerated solvent extraction (ASE), and a selected ion monitoring (SIM) detection system of capillary GC-MS. The ASE parameters were optimized (P = 120 bar, T = 60 oC) and GC-MS condition...
The technology of human-computer interaction (HCI) is developing rapidly in tandem with the advancement of information and biological technologies. Many new types input device are introduced into this field; some of them are aimed to benefit special groups of people like old or disabled persons. In the meantime, Electromyography (EMG) and Inertia Measure Unit (IMU) have been readily available and...
Accurate clinical assessment of a patient's condition is paramount to providing the type and intensity of therapy for patients. Currently, typical objective assessments require therapists to subjectively grade various tasks patients have to do. Also, the administration of these assessments are onerous and error prone. In our approach we embed sensors into objects used in the assessments. By using...
Sternocleidomastoid (SCM) muscle activity to keep the head stable in slalom driving is analyzed by surface electromyography (sEMG). Using sEMG signals of SCM muscles, this study evaluates a passenger's sensitivity to different vehicle dynamic characteristics, especially in terms of lateral and roll vabrations. In actual slalom driving, it is found that the sEMG signal is more active when the amplitude...
Joint stiffness plays an important role in both safety and control performance, particularly in human-friendly robots using artificial pneumatic muscles. Due to the limited control bandwidth of pneumatic muscles, stiffness characteristics and their effects on safety in the frequency domain should be taken into account. This paper introduces the concept of instantaneous stiffness and validates its...
4 Chinese elite Open-women rowers are chosen, make use of the "Rower Expert Light" (WEBA Sport) to collect the data of 1×rowing technique and analysis. With the increase in tempo, drive and recovery become more rapidly, but push propeller speed increase faster, there is no significant increase in the strength of drive, and the strength of drive for boat speed does not play a decisive role...
Through the biochemical detection (LA, CK, PFK, PK)of 40 testing athletes who taking quantitative FDP and placebo before anaerobictraining, 2hours after anaerobictraining and next morning, observe the actual results of anti-fatigue, the promotion of fatigue recovery and to further explore its mechanism. The result shows, taking FDP can promote glycolysis, quicken eliminate LA, promotion composing...
The purpose of this study is to investigate the transfer functions of mechanomyograms (MMGs) detected with an acceleration sensor and a laser displacement meter. The MMGs evoked by electrical stimulation to the peroneal nerve were recorded on the skin of the tibial anterior muscle. The displacement MMG (DMMG) and the acceleration MMG (AMMG) systems were identified using a singular value decomposition...
Recently, detecting upper-limb motion intention for prosthetic control purpose attracted growing research attention. In most of the studies, recordings of forearm muscle activities were used as the signal sources, from which the intention of wrist and hand motions were detected using pattern recognition technology. However, most daily-life upper limb activities need coordination of the shoulder-arm-hand...
Gait-training robots must display a low inertia in order to allow normal-looking walking. We studied the effect of inertia added to the pelvis during walking. We attached subjects to a mechanism that displays inertia to the pelvis in the anterior/posterior (AP) direction and the lateral direction independently. During walking we measured EMG, metabolic rate and kinematics of nine subjects. We found...
Hippo therapy, also known as equestrian rehabilitation, makes use of the physical interactions between the riding patient and the horse movements, by inducing the patient's trunk to became receptive and responsive to solicitations and consequently improving his postural control and his muscular tone. Evidences of therapy effectiveness have been assessed in gross motor function rehabilitation in children...
Previous studies have shown that human body sway during standing approximates the mechanics of an inverted pendulum pivoted at the ankle joints. In this study, a robotic balance system incorporating a Stewart platform base was developed to provide a new technique to investigate the neural mechanisms involved in standing balance. The robotic system, programmed with the mechanics of an inverted pendulum,...
In labor-intensive fields, lifting a heavy object up and down is regarded as a frequently performed motion which imposes a physical strain on workers, and power assist systems are expected to address such a problem. The objectives of this paper are to introduce system design for forearm support-type lift assist system (FOLAS) and to verify its basic functionality and usefulness in lifting motion support...
Research objective is motion control of a humanoid robot limb with considerations of characteristics of biological subjects. There are some differences between biological subjects and conventional humanoid robots from the point of its mechanisms and control method. From the point of mechanism, biological subjects have two joints simultaneous drive, which is called bi-articular simultaneous drive....
In this paper, we focus on word "mum" which is a popular word all over the wold, and study its EMG curves using Method of Functional Data Analysis. We show that linear model for the data and the estimated regression function can be extended to area of neural activation. If we research the acceleration of some body part, we are getting close to seeing how this remarkable control mechanism...
People with motor impairments often need adaptation of input devices to interact with surrounding people and home-appliances via communication aids and environmental control systems. During the adaptation, a body part to be used, a device to be activated, its specific location, and a posture to use it should be decided by assessing accuracy and speed of motions. Additionally, the strength and frequency...
This paper presents an inexpensive MEMS accelerometer-based sleep-apnea screening technique. The algorithm presented here is easy to implement on a low-end microprocessor, and also accurate enough to detect both obstructive sleep apnea and hypopnea episodes. The results of some preliminary studies are included.
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