• PNF and Movement
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• 제12권3호
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• pp.159-165
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• 2014

Purpose: The purpose of this study was to investigate the effect of early ankle exercise with functional electrical stimulation(FES) on spasticity, strength and active range of motion of ankle in patients with stroke. Methods: This study included 21 patients with stroke, who were performed early ankle exercise combined FES. The exercise program comprised 5 sessions of 30 minutes per week for 4 weeks. The spasticity, strength and active range of motion of ankle were evaluated before and after training. The spasticity was measured by modified ashworth scale(MAS), strength of ankle was measured by hand-held dynamometer and active range of motion of ankle dorsi-flexion was measured by goniometer. All data were analyzed using SPSS 18.0. Results: Significant differences were observed the subjects for strength of ankle and active range of motion. The results of the study were as follow: strength of ankle was significantly increased subjects(p<.001) and active range of motion was significantly increased subjects(p<.001). Conclusion: Ankle is very important part of body in stroke patients. early ankle exercise with FES is effective for improvement of strength of ankle and active range of motion in patients with stroke. ealry ankle exercise with FES about stroke patient is very useful and effective. It is effective in clinical practice.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2005년도 춘계학술대회 논문집
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• pp.769-772
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• 2005

Five DOF motion errors of a hydrostatic bearing table driven by the coreless type linear motor were compensated utilizing the active controlled capillaries in this study. Horizontal linear motion and yaw error were simultaneously compensated using two active controlled capillaries and vertical linear motion, pitch and yaw error were also simultaneously compensated using three active controlled capillaries. By the compensation, horizontal linear motion accuracy and yaw were improved from 0.16 ${\mu}m$ and 1.96 arcsec to 0.02 ${\mu}m$ and 0.03 arcsec. Vertical linear motion accuracy, pitch and roll were also largely improved from 0.18 ${\mu}m$, 2.26 arcsec and 0.14 arcsec upto 0.03 ${\mu}m$, 0.07 arcsec and 0.02 arcsec. The compensated motion errors were within the range of measuring repeatability which was ${\pm}0.02\;{\mu}m$ in the linear motion and ${\pm}0.05$ arcsec in the angular motion. From these results, it is found that the motion error compensation method utilizing the active controlled capillaries are very effective to improve the five motion accuracies of the hydrostatic bearing tables.

• Physical Therapy Rehabilitation Science
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• 제11권4호
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• pp.430-435
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• 2022

Objective: This study was conducted to investigate the effect of active movement with skin mobilization on range of motion, pain, and rating of perceived exertion in patients diagnosed with axillary web syndrome after axillary lymph node dissection. Design: A Case report Methods: It was performed on 7 patients diagnosed with axillary web syndrome after lymph node dissection. The subjects experienced a decrease in the range of joint motion and pain in movement when raising their arms in their daily lives, and complained of discomfort. The active range of motion, numeric rating scale, and modified Borg scale of shoulder joint flexion were measured, and the differences after active movement with skin mobilization were compared. Results: All subjects increased by 24.9 degree on average in active range of motion after active movement with skin mobilization intervention. There was no pain in the maximum range of joint motion measured before intervention, and rating of perceived exertion was significantly reduced. Conclusions: Active movement with skin mobilization can be a very useful way to help improve and treat axillary web syndrome, and it is recommended for improving the function and quality of life of axillary web syndrome patients. and It is also believed that it can be used steadily at home through the education of patients and families.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 추계학술대회 논문집
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• pp.72-75
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• 2000

This paper presents a simulation study on the description of the motion and the control of an active catheter actuator with multi-link structure actuated by Shape Memory Alloy(SMA). The model of an active catheter adopted in this paper has 3 links, and the individual links are composed of 3 micro coils of SMA for the omni-directional motion. In order to analyze the motions of multi-link structure, 3-dimensional kinematics description is presented. Also, the motion control of the end point of an active catheter using simple Neural Network is shown based on GUI(Graphic User Interface) system.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.399.2-399
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• 2002

This paper concerns on a non-rotating single-DOF beam-active magnetic bearing(AMB) system subject to arbitrary shaped base motion. In such a system, it is desirable to retain the beam within the predetermined air-gap under foundation excitation. Motivated form this, an adaptive acceleration feedforward control is proposed to reduce the base motion response without deteriorating other feedback control performances. Experimental results demonstrate the effectiveness of the acceleration feedforward control.

• 국제물리치료학회지
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• 제8권1호
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• pp.1071-1076
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• 2017

The purpose of this study was to determine if a gentle form of manual lumbar traction could reduce painful lumbar motions associated with lumbar disc degeneration (LDD). This clinical trial incorporated 134 participants with painful active lumbar motion. Participants were randomly assigned to an experimental treatment or sham group. 67 participants received sidelying manual lumbar traction while the other 67 participants received a sham treatment. Pre and post treatment NPRS values for the painful active lumbar motion were recorded for each group. There was a statistically significant improvement (P=0.00) for decreased pain intensity during active lumbar motion in the experimental group as compared to the sham treatment group. The average percent decrease in numeric pain rating scale (NPRS) values was 52.1% for the experimental treatment group and 8.1% for the sham group. The results of the study suggest that side-lying manual lumbar traction can improve painful lumbar motion in patients with LDD.

• 한국정밀공학회지
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• 제28권5호
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• pp.599-605
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• 2011

A 3-D rehabilitation robot system is developed. The robot system is for the rehabilitation of upper extremities, especially the shoulder and elbow joints, and has 3-D workspace for occupational therapy to recover physical functions in activities of daily living(ADL). The rehabilitation robot system has 1 DOF in horizontal rotational motion and 2 DOF in vertical rotational motion, where all actuators are set on the ground. Parallelogram linkage mechanisms lower the equivalent inertia of the control elements as well as control forces. Also the mechanisms have high mechanical rigidity for the end effector and the handle. In this paper, a hybrid position/force controller is used for controlling positions and forces simultaneously The controller is tuned according to the robot posture. The active motion modes for rehabilitation program consist of active-resisted motion mode and active-free motion mode. The results of the experiments show that the proposed motion modes provide the intended forces effectively.

• 한국정밀공학회지
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• 제15권7호
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• pp.160-166
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• 1998

In this research a 2-dimensional motion generator composed of two linear motors was developed. The inertia, damping and/or stiffness characteristics of the motion generator can be changed on the real-time basis by properly regulating the force generated by the linear motors. That is, active impedance is implemented without actual change in the physical structure of the motion generator. Control of the motor force is carried out by controlling the input currents supplied to the linear motors based on the combination of the PI controller and feedforward controller. This motion generator can be used to measure a kinesthetic sense associated with the human arm and thus to develop the products for which the kinesthetic sense is taken into account.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.172.5-172
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• 2001

Target Motion Analysis(TMA) for Passive Sonar Systems with bearing-only measurements needs to enhance system observability to improve target tracking performance by ownship maneuvering. However, tracking problem incurred by weak observaility result in slow convergence of the target estimates. On the other hand, active sonar systems do not have problem associated with system observaility. However, it drawback related to system survivability. In this paper, the algorithm that could be used in Active/passive Mixed-Mode Sonar Systems is proposed to analyze maneuvering target motion and to improve TMA performance. The proposed TMA algorithm is tested by a series of computer simulation runs and the results ...

• 한국정밀공학회지
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• 제20권9호
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• pp.84-91
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• 2003

This paper concerns on one-DOF non-rotating active magnetic bearing (AMB) system subject to base motion. In such a system, it is desirable to retain the axis within the predetermined air-gap while the base motion forces the axis to deviate from the desired air-gap. Motivated from this, an optimal acceleration feedforward control is proposed to reduce the base motion response without deteriorating other feedback control performances. Experimental results demonstrate that the proposed optimal feedforward control reduces the standard deviation of the air-gap to 29％ that by feedback control alone.