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3차원적 어깨재활운동 시 도수 저항의 강도에 따른 어깨안정근의 활성도 및 비율
손민혁,노현빈,박두진,Min-Hyeok Son,Hyun-Been Roh,Du-Jin Park 대한고유수용성신경근촉진법학회 2024 PNF and Movement Vol.22 No.2
Purpose: The aim of this study was to compare the activation of shoulder stabilizer muscles to variations of manual resistance during three-dimensional shoulder rehabilitation exercises. Methods: A total of 13 participants were included in this study. To normalize each muscle's activity, a maximal isometric voluntary contraction was performed by all participants. After receiving 30 minutes of training in three-dimensional shoulder rehabilitation exercises, participants randomly performed PNF arm and scapular patterns according to the intensities of manual resistance. The activities of the upper trapezius, lower trapezius, and serratus anterior were measured during these patterns. All exercises were performed for five seconds, and the average of three seconds, excluding the first and last seconds, was used for data analysis. Results: Lower trapezius activity was significant among manual resistance intensities. In both the PNF arm and scapular patterns, using 80% manual resistance of maximum resistance showed higher activity of the lower trapezius muscle compared to 20% of the maximum resistance. Conclusion: It is expected that PNF arm and scapular patterns, with varying intensities of manual resistance, can be used for early rehabilitation of patients with shoulder impingement syndrome.
육상교통 항법을 위한 네트워크기반 위성항법보정 시스템의 구성
손민혁,손은성,이은성,허문범,남기욱,Son, Minhyuk,Son, Eunseong,Lee, Eunsung,Heo, Moon-Beom,Nam, Gi-Wook 한국항공운항학회 2013 한국항공운항학회지 Vol.21 No.4
In this paper, a configuration procedure of a transportation infrastructure system for GNSS based very precise real-time positioning is proposed. This infrastructure system consists of several receiving station, a central station, and communication sub-systems. The required performance, design, implementation and verification of each sub-system are explained respectively. The required performance can be broken down into accuracy, integrity, stability, processing time. The design of the each sub-system is performed in accordance with the required performance and each sub-system is built with regard to the design. Lastly the implemented system is verified in comparison with the required performance.
정밀 위치결정 성능 최적화를 위한 위성항법 수신국 네트워크 구성
손민혁 ( Min Hyuk Son ),김규헌 ( Geo Heon Kim ),이은성 ( Eun Sung Lee ) 한국항공운항학회 2012 한국항공운항학회지 Vol.20 No.4
In this paper, requirements of GNSS receiver station installation are derived for optimizing the performance of network based GNSS precise positioning by concern of international organization(IGS, NGS) recommendation. Also a analysis method of network based GNSS precise positioning is suggested in order to evaluate the availability depending on various network configurations. To evaluate network candidates, a performance evaluation method is proposed for positioning of users according to a geometric configuration and the baseline distance. After the proposed method is used to Ochang region that is a the test area 6 network candidates are derived and the performance of positioning was analyzed. Finally, Ansung, Gongju,Eumsung, Boeun network configuration was selected as the best positioning performance. An optimal Receiving station network was selected using the proposed method.
손민혁(Minhyuk Son),부광석(Kwangseok Boo),김흥섭(Heungseob Kim) 한국자동차공학회 2010 한국자동차공학회 부문종합 학술대회 Vol.2010 No.5
This paper describes the method of control allocation for chassis stability control system and study of stability region of driving vehicle. As the vehicle stability enhancement, unified chassis control system is developed by integration of a individual controller. Moreover original ability, these systems are used for vehicle behavior control by brake pressure control, superimposed steering, active damping control. Most of these systems composes that choice the reference parameter and control that minimize the error between reference and actual parameter, but effects of control input to vehicle stability is still unclear. In this paper will present control allocation contributions to vehicle stability. Consequently, these control input guarantee the stability region, while satisfying all actuator constraints.
다양한 노면 조건에서의 능동 긴급 제동 시스템(AEBS) 성능 해석 시뮬레이션
손민혁(Minhyuk Son),남창훈(Changhoon Nam) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
This paper presents the use of software tools that together provide the ability to cover critical aspects of active safety system design and performance analysis simulation. One of the software tools (PreScan) focuses on the design of the sensing and control systems, as well as the evaluation for a wide range of traffic and weather scenarios. Another software tool (CarSim) takes care of the detailed vehicle dynamics and has the function for external tire model and road profiles. For detailed the tireroad contact patch and tire forces, a Short Wavelength Intermediate Frequency Tyre (SWIFT) model has considered. A road profile model can generate by OpenCRG easily and coupled with the tire models in the CarSim. By means of an application example of an Active Emergency Braking System (AEBS) under rough road conditions, the combined use of those software tools to design and evaluate the performance of active safety system is demonstrated.
손민혁(Son, Minhyuk),이재은(LEE, Jaeeun),김군택(KIM, Koontack),이병석(LEE, ByungSeok),남기욱(Nam, Gi-Wook) 한국항공우주연구원 2020 항공우주산업기술동향 Vol.18 No.1
위성항법 기술 선진국은 독자적으로 위성항법시스템을 개발하여 운영하고 있으며 항법 성능을 향상하고 보장하기 위한 위성 기반의 위성항법보정시스템(SBAS)을 함께 운영하고 있다. 유럽연합은 EGNOS를 개발하여 운영하고 있으며 항공은 물론 해상, 육상까지 그 영역을 넓혀 가고 있다. 또한, EGNOS의 운영 효율과 성능의 향상 등을 위해 지속적인 시스템의 업데이트 및 업그레이드를 추진하여 시스템을 진화시키고 있다. 여기서 EGNOS 시스템에 대해 세부적으로 알아보고 성능 유지 및 향상을 위한 EGNOS 시스템의 진화에 대해 살펴보기로 한다. 또한, 국내에서 개발 중인 KASS의 개발 현황을 살펴보기로 한다. Advanced countries related to satellite navigation technology have independently developed and operated satellite navigation systems, and are also operating Satellite Based Augmentation System (SBAS)’s to improve and ensure navigation performance. The European Union has developed and operated EGNOS and is expanding its scope not only to aviation, but also to sea and land transportation. In addition, EGNOS is continuously evolving the system by continuously updating and upgrading the system to improve its operation efficiency and performance. In this paper, the introduction of the EGNOS system and the evolution of the EGNOS system for maintaining and improving performance are described in detail. In addition, it presents the development status of KASS in Korea.
손민혁 ( Min Hyuk Son ),도용태 ( Yong Tae Do ) 한국센서학회 2011 센서학회지 Vol.20 No.3
Line tracking is a well defined method of mobile robot navigation. It is simple in concept, technically easy to implement, and already employed in many industrial sites. Among several different line tracking methods, magnetic sensing is widely used in practice. In comparison, vision-based tracking is less popular due mainly to its sensitivity to surrounding conditions such as brightness and floor characteristics although vision is the most powerful robotic sensing capability. In this paper, a vision-based robust path line detection technique is proposed for the navigation of a mobile robot assuming uncontrollable surrounding conditions. The technique proposed has four processing steps; color space transformation, pixel-level line sensing, block-level line sensing, and robot navigation control. This technique effectively uses hue and saturation color values in the line sensing so to be insensitive to the brightness variation. Line finding in block-level makes not only the technique immune from the error of line pixel detection but also the robot control easy. The proposed technique was tested with a real mobile robot and proved its effectiveness.