• Title, Summary, Keyword: Assistance Power

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A Study on the Solar Cell Charging Equipment for Hybrid Vehicle (Hybrid 자동차용 Solar Cell 충전장치에 관한 연구)

  • Kim, G.S.;Park, S.C.
    • Journal of the Korean Society of Mechanical Technology
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    • v.13 no.4
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    • pp.157-164
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    • 2011
  • Hybrid car can improve fuel efficiency using a power of motor that is generated during constant-speed or deceleration driving. The motor is located between engine and transmission. But, when voltage of main battery is low, fuel efficiency is low because the voltage can't run the motor. In this situation, this study observed fuel efficiency when using solar cell for assistance power. In order to verify a fuel consumption of hybrid car equipped solar cell for assistance power, the car was tested downtown driving. As hybrid car was equipped solar cell for assistance, fuel consumption was reduced 8.35 % at running air conditioner. And, at air conditioner doesn't work, fuel consumption was reduced 6.88 %. This point of view, CO2 is expected to reduce in similar proportion.

Early Emergency Responses of the Japan Atomic Energy Agency against the Fukushima Daiichi Nuclear Power Station Accident in 2011

  • Okuno, Hiroshi;Sato, Sohei;Kawakami, Takeshi;Yamamoto, Kazuya;Tanaka, Tadao
    • Journal of Radiation Protection and Research
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    • v.46 no.2
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    • pp.66-79
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    • 2021
  • Background: The Japan Atomic Energy Agency (JAEA) is specified in the Disaster Counter-measures Basic Act as a designated public corporation for dealing with nuclear disasters. Materials and Methods: The Nuclear Emergency Assistance and Training Center (NEAT) was established in 2002 as the activity base providing technical assistance to both national and local governments during nuclear emergencies. The NEAT has a robust structure and utilities and special installations, and it organizes training and exercises. Results and Discussion: Due to an offshore earthquake that caused a devastating tsunami in March 2011, a nuclear accident occurred at the Tokyo Electric Power Company's Fukushima Daiichi Nuclear Power Station. The NEAT responded by conducting off-site environmental radiation monitoring and contamination screening, dispatching special vehicles, offering telephone consultations, and calculating the dispersion of radioactive materials. An examination of the emergency response activities revealed that the organization was prepared for these types of disasters and was able to plan long-term response. Conclusion: As a designated public corporation, the JAEA technically supports the national government, the Fukushima prefectural government, and the Ibaraki prefectural government, all of which responded to the off-site emergencies resulting from the March 2011 Fukushima Daiichi accident

A Study on the SCADA Simulator (SCADA 시뮬레이터에 관한 연구)

  • Lee, Heung-Jae;Lim, Chang-Ho;Ahn, Bok-Shin;Park, Young-Moon
    • Proceedings of the KIEE Conference
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    • pp.936-938
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    • 1997
  • Up to date, operator assistance systems -fault diagnosis system, fault restoration system etc.- are developed for power system automation. In this condition, an efficiency test of assistance system must be performed to prove application in real power system. This paper presents an SCADA simulator for an efficiency test of the operator assistance system, which is developed in the SCADA system. The proposed simulator is implemented under Win95 with Pentium-PC.

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Strategy for Expansion of Overseas Construction Competitive Power by Official Development Assistance(ODA) (해외건설 수주경쟁력 향상을 위한 ODA (Official Development Assistance) 활용방안)

  • Choi, Jin-Wook;Kim, Jae-Jun;Lee, Han-Seung;Jeon, Rak-Keun
    • Korean Journal of Construction Engineering and Management
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    • v.8 no.5
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    • pp.173-181
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    • 2007
  • The domestic construction market is recently daunted because of the sustainable real estate regulation policy by the government. In other aspect, after the WTO(World Trade Organization)system opened overseas construction is growing continuously with grow of international economy and opening of market through world. Therefor needs to establish strategy on expansion or over seas construction competitive power. The purpose of this research is expansion on over seas construction competitive power by suggesting project cost guarantee methods to Owner and cost guarantee methods are Official Development Assistance(ODA). Accordingly, this research analyzed a developed $country^{\circ}{\phi}s$ ODA and domestic ODA. Moreover, survey to Expert of related field about over seas construction and ODA for identified problems. Especially, based on the results it intends to analyzed domestic ODA competitive power and improve strategy to competitive power of receive an order on over seas construction.

Design and Control of a Wearable Robot for Stair-Climbing Assistance (계단 보행 근력 보조를 위한 착용형 로봇의 설계 및 제어)

  • Kim, Myeong-Ju;Kang, Byeong-Hyeon;Kim, Ok-Sik;Seo, Ki-Won;Kim, Jung-Yup
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.26 no.1
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    • pp.89-99
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    • 2017
  • This paper describes the development of a thigh wearable robot for power assistance during stair climbing. In the wearable robot developed in this study, high-power BLDC motors and high-capacity harmonic reduction gears are used to effectively assist the thigh muscle during stair climbing. In particular, normal ground and stair are distinguished accurately by using wireless smart shoes, and the stair climbing assistance is performed by activating the actuators at an appropriate time. Impedance of the hip joint was effectively reduced by performing friction compensation of the gears, and a wearing adjustment mechanism was designed to fit the robot to the thigh by conveniently modifying the width and tilting angle of the robot using set collars. Consequently, the performance of the developed thigh wearable robot was verified through stair climbing experiments with EMG measurement.

A Study for Driving Mechanism Evaluation of the Lane Keeping Assistance System (차선유지지원장치 작동 메커니즘 평가에 관한 연구)

  • Chung, Seung-Hwan;Kim, Jeong-Min;Kwon, Seong-Jin;Lee, Bong-Hyun
    • Journal of Auto-vehicle Safety Association
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    • v.5 no.1
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    • pp.69-74
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    • 2013
  • LKAS(Lane Keeping Assistance System) main function is to support the driver in keeping the vehicle within the current lane. Therefore, this system is able to reduce the driver workload with assisting the driver during driving. In this paper, we presented on study for test procedures and evaluation methods of the LKAS. The vehicle test conducted on straight road, left curve, right curve and four different types of lane under various vehicle speeds. This study proposed the LKAS system test procedures and methods that we are able to identify LKAS driving mechanism and performance.

Design and Control of a Novel Tendon-driven Exoskeletal Power Assistive Device (새로운 와이어 구동방식 외골격 보조기의 설계 및 제어)

  • Kong Kyoung-chul;Jeon Doyoung
    • Journal of Institute of Control, Robotics and Systems
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    • v.11 no.11
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    • pp.936-942
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    • 2005
  • Recently the exoskeletal power assistive equipment which is a kind of wearable robot has been widely developed to help the human body motion. For the elderly people and patients, however, some limits exist due to the weight and volume of the equipments. As a feasible solution, a tendon-driven exoskeletal power assistive device fur the lower body, and caster walker are proposed in this research. Since the caster walker carries the heavy items, the weight and volume of the wearable exoskeleton are minimized. The key control is used to generate the joint torque required to assist motions such as sitting, standing and walking. Experiments were performed for several motions and the EMG sensors were used to measure the magnitude of assistance. When the motion of sitting down and standing up was compared with and without wearing the proposed device, the $25\%$ assistance was acquired.

Three-Level ZVZCS DC/DC Converter using a Assistance Power Sources of the RailRoad Vehicles (철도차량 보조전원용 Three-Level ZVZCS DC/DC 컨버터)

  • Rho S.C.;Lim E.K.;Yang S.H.;Kim Y.H.
    • Proceedings of the KIPE Conference
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    • pp.880-885
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    • 2003
  • Using a Assistance Power Sources of the Railroad Vehicles Three-Level ZVZCS DC/DC Converter is presented in this paper. The proposed three-Level DC/DC Converter Is to achieved zero voltage and zero current switching for the two Main switches. phase shift method is used a parastic capacitance by reverse recovery characteritics in a inner diode of the switching device. Also. using a diode second part of the Transformer by the simple auxiliary circuit for the achieved zero current switching of the Auxiliary switch. For the ZVZCS movement of the all switching devices is analyzed and verified under a 5kW, in the 100kHz switching frequency.

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Development of Wearable Robot for Elbow Motion Assistance of Elderly (노약자의 팔꿈치 거동 지원을 위한 착용형 로봇 개발)

  • Jang, Hye-Yoen;Han, Chang-Soo;Kim, Tae-Sik;Jang, Jae-Ho;Han, Jung-Soo
    • Journal of the Korean Society for Precision Engineering
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    • v.25 no.3
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    • pp.141-146
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    • 2008
  • The purpose of this study is to develop the algorithm which can control muscle power assist robot especially for elderly. Recently, wearable robots for power assistance are developed by many researchers, and its application fields are also variable such as for medical or military equipment. However, there are many technical barriers to develop the wearable robot. This study suggest a control method improving performance of a wearable robot system by using a EMG signal of major muscles and a force sensor signal as command signal of system. The result of the robot Prototype efficiency experiment, the case of Maximum Isometric motion it suggest 100% power of muscle, the man need only 66% of MVIC(Maximum Voluntary Isometric Contraction) to lift 5kg dumbbell without robot assist. However the man needs only 52% of MVIC to lift 5kg dumbbell with robot assist. Therefore 20% muscle power increased with robot assist. Also, we designed light weight robot mechanism that extract the command signal verified and drive the wanted motions.