• 제목/요약/키워드: Vehicle Capacity

검색결과 631건 처리시간 0.031초

철도차량 보조전원장치 특성 분석에 관한 연구 (A Study on Characteristic Analysis of Auxiliary Power Supply for Railway Vehicle)

  • 한영재;한성호;이태형;이수길;이영호
    • 전기학회논문지P
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    • 제66권4호
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    • pp.177-181
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    • 2017
  • Auxiliary power supply for railway vehicle is a equipment that focuses on the service of passengers in a vehicle. It supplies power to controllers used in heating and cooling devices, fluorescent lamps, batteries and many other electrical equipments. Most of the auxiliary power supply for railway vehicle are mainly used for the round trips and circulation routes within the metropolitan area and have a capacity of 170~200 kVA. In this study, we developed the auxiliary power supply capacity to 240kVA for 200km/h class. As such, the auxiliary power supply is an important device for securing the reliability and safety of the railway vehicle and improving the passenger convenience, so the performance verification of the performance must be ensured. In this paper, 240kVA auxiliary power supply is developed. Also, performance of the auxiliary power supply manufactured through the analysis of various characteristics related to the auxiliary power supply was confirmed while operating the actual line.

리튬폴리머 축전지의 철도차량 적용 및 용량증대에 관한 연구 (A Study on the Rail Vehicle Applications and Increase the Capacity of Lithium Polymer Batteries)

  • 조규화;강승욱
    • 전기학회논문지P
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    • 제65권4호
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    • pp.340-345
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    • 2016
  • Railway vehicle battery is supplying the power required for the initial start-up of the train, in the event of a fault in the vehicle, or catenary for supplying emergency power is one of the components are very important. Currently, the railway vehicles such as nickel-cadmium batteries are being used [1,2]. Ni-Cd batteries as a battery installed in the railway vehicles have a strong corrosion resistance is included, The charge-discharge performance is significantly degraded in cold weather, there is a danger of deterioration or explosion. Train accidents have been caused a lot of damage due to rapid deterioration and cracking of the battery and memory due to the effect of Ni-Cd batteries. In order to solve the problems, There is no risk of degradation, deterioration and leakage, cracking and exploding. maintenance is simple and applied measures proposed to apply Lithium Polymer battery of high performance. In addition, the lack of capacity problems identified by testing the different special systems is replaced by a 70Ah lithium-polymer battery is possible without changing the batteries of 50Ah caused by installing additional equipment in existing older trains were applied to the vehicle.

전력 보조서비스 제공을 위한 전기자동차 충/방전 최적화 (Battery Charge and Discharge Optimization for Vehicle-to-grid Regulation Service)

  • 김욱원;신홍열;김진오;김규호
    • 전기학회논문지
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    • 제63권8호
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    • pp.1033-1038
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    • 2014
  • Electric vehicles should be connected to power system for charge and discharge of battery. Besides vehicle's battery is charged for a power source, it is also reversibly possible to provide power source from battery to power system. Researches on battery usage for regulation resources have been progressed and could cause cost increase excessively because they distribute regulation capacity equally without considering the battery wear cost of SOC, temperature, voltage and so on. This causes increase of grid maintenance cost and aggravate economical efficiency. In this paper it is studied that the cost could be minimized according to the battery condition and characteristic. The equation is developed in this paper to calculate the possible number of charge and discharge cycle, according to SOC level and weighting factors representing the relation between battery life and temperature as well as voltage. Thereafter, the correlation is inferred between the battery condition and wear cost reflecting the battery price, and the expense of compensation is decided according to the condition on battery wear-out of vehicle. In addition, using realtime error between load and load expectation, it is calculated how much regulation capacity should be provided.

독립현가형 AWD 차량의 구동축 가속 수명 평가에 관한 연구 (A Study on the Accelerated Life Evaluation of Drive Shaft for Independent Suspension type AWD Vehicle)

  • 김도식
    • 한국신뢰성학회지:신뢰성응용연구
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    • 제11권4호
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    • pp.343-356
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    • 2011
  • This paper proposes an accelerated life evaluation of drive shaft. The life test of drive shaft for independent suspension type AWD vehicle should be performed by use of the least test sample because many number of samples can't be used for the test because of its mass capacity and high price. We calculated the no failure test time by application of no failure test concept, and the already performed test data for drive shaft are applied for some kinds of reliability coefficients which are needed for calculation of life test time. And, for analysis of real driving condition of vehicle, the load spectrum is prepared using the needed road condition and vehicle data. The inverse power model is used for accelerated life test. The equivalent torque of load spectrum is achieved by use of Miner's Rule, and then the final accelerating condition is determined by decision of the accelerated test torque. This paper shows that the accelerated life test results corresponds with the target life and the proposed life test method can be very well applied to no failure life test for mass capacity machinery components.

다품종 독립 적재공간을 갖는 배달과 수거를 동시에 고려한 차량경로문제 (A Simultaneous Delivery and Pick-up Heterogeneous Vehicle Routing Problem with Separate Loading Area)

  • 김각규;김성우;조성진
    • 대한산업공학회지
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    • 제39권6호
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    • pp.554-561
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    • 2013
  • As a special topic of the vehicle routing problems (VRP), VRPSDP extends the vehicle routing problem as considering simultaneous pickup and delivery for goods. The past studies have mainly dealt with a only weight constraint of a loading capacity for heterogeneous products. However. this study suggests VRPSDP considering separate loading area according to characteristics of loading species. The objective is to design a set of minimum distance routes for the vehicle routing assignment with independent capacity for heterogeneous species. And then we present a another HVRPSDP model which is easy to utilizes in a unique circumstance that is a guarantee of executing a task simultaneously from the various areas under restricted time and raising an application of vehicles that returns at the depot for the next mission like the military group. The optimal results of the suggested mathematical models are solved by the ILOG CPLEX software ver. 12.4 that is provided by IBM company.

시간종속VRP의 효율적 해법 설계를 위한 차량통행속도의 분석과 재구성 (Analysis and Reconstruction of Vehicle Speeds to Design an Efficient Time Dependent VRP Heuristic)

  • 문기주;박성미
    • 산업경영시스템학회지
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    • 제35권1호
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    • pp.140-147
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    • 2012
  • Vehicle routing problem is one of the traveling salesman problems with various conditions such as vehicle capacity limits, delivery time windows, as well as time dependent speeds in metropolitan area. In this research hourly vehicle moving speeds information in a typical metropolitan area are analyzed to use the results in the design procedure of VRP heuristic. Quality initial vehicle routing solutions can be obtained with adaption of the analysed results of the time periods with no vehicle speed changes. This strategy makes complicated time dependent vehicle speed simple to solve. Time dependent vehicle speeds are too important to ignore to obtain optimum vehicle routing search for real life logistics systems.

차량 통행하중에 대한 사장교의 신뢰성에 기초한 안전도 및 내하력평가 (Reliability Based Assessment of Safety and Load Carrying Capacity of Cable-Stayed Bridge under Vehicle Traffic Loads)

  • 조효남;이승재;임종권
    • 한국전산구조공학회:학술대회논문집
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    • 한국전산구조공학회 1994년도 봄 학술발표회 논문집
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    • pp.199-208
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    • 1994
  • One of the main objectives of the study is to propose a practical but realistic limit state model considering combined effect of axial and bending load for reliability analysis and safety assessment of cable-stayed bridge under vehicle traffic loads. This paper is intended to propose a new approach for the evaluation of reserved load carrying capacity of cable-stayed bridge under vehicle traffic loads in terms of equivalent strength, which may be defined as a bridge strength corresponding to the reliability index of the bridge. This can be derived from an inverse process based on the concept of FOSM form of reliability index. AFOSM and IST methods are used for the reliability analysis of the proposed models. The proposed reliability model and methods are applied to the safety assessment of Jindo Bridge which is one of major two cable-stayed bridges in Korea.

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지역소매 유통회사의 효율 최적화를 위한 Genetic Algorithm의 적용 (Optimization of Local Retail Distribution Company Problem using Genetic Algorithm)

  • 윤항묵;김동우;류광렬
    • 한국항만학회지
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    • 제11권1호
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    • pp.75-83
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    • 1997
  • In this paper, we codify the objective function that should be optimized by using Genetic Algorithm instead of Heuristic method to solve these problems. So, each bit that constitutes one structure can signify each commodity. Therefore, we can exchange customers without restriction if the traveling distance diminishes among the districts. Furthermore, even though the capacity of a customer's commodities exceeds that of a vehicle, the following vehicle can be allocated. Also, we obtained good result by testing with real data. To be brief, we can effectively allocate innumerable commodities, that have various magnitudes and weight, into restricted capacity of the vehicle by applying genetic algorithm that is useful in solving the problems of optimization.

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차량 군집주행을 위한 제어 네트워크의 변수 추정 및 제어 (State Estimation and Control in a Network for Vehicle Platooning Control)

  • 최재원;황태현;김영호
    • 제어로봇시스템학회논문지
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    • 제6권8호
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    • pp.659-665
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    • 2000
  • In this paper a platoon merging control system is considered as a remotely located system with state represented by a stochastic process. in the system it is common to encounter situations where a single decision maker controls a large number of subsystems and observation and control signals are sent over a communication channel with finite capacity and significant transmission delays. Unlike a classical estimation problem where the observation is a continuous process corrupted by additive noise there is a constraint that the observation must be coded and transmitted over a digital communication channel with fintie capacity. A recursive coder-estimator sequence is a state estimation scheme based on observations transmitted with finite communication capacity constraint. in this paper we introduce a stochastic model for the lead vehicle in a platoon of vehicles in a lane considering the angle between the road surface and a horizontal plane as a stochastic process. In order to merge two platoons the lead vehicle of the following platoon is controlled by a remote control station. Using the observation transmitted over communication channel the remote control station designs the feedback controller. The simulation results show that the intervehicle spacings and the deviations from the desired intervehicle spacing are well regulated.

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열부하 및 회생 제동 특성을 고려한 경형 친환경차의 제동시스템 개발에 관한 연구 (A Study on Development of Brake System of Light Eco-Friendly Car Considering Heat Load and Regenerative Braking Characteristic)

  • 심재훈;신웅희;이중희;황세라;임원석;김병철
    • 자동차안전학회지
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    • 제12권2호
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    • pp.7-13
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    • 2020
  • Recently, there is a big issue of downsizing on brake system according to fuel efficiency and regenerative braking cooperation control. Especially, small cars have improved in a variety ways such as electric vehicle and smart car compared to previous small cars. So, small brake system is strongly required in the car industry. A new small brake system for light compact vehicles was proposed in this paper. For this system, the solid type disc and caliper were newly developed. And the important design factors were considered to reduce brake size. First, we calculated the temperature rise of disc through heat capacity formula and CAE analysis. Second, we analyzed the housing and carrier stiffness of caliper to select the reasonable condition. Finally, the superiorities of the developed brake system were verified by heat capacity, consumption liquid level, braking feeling, judder, wear test and regenerative braking cooperation control analysis. A developed brake system is expected to be useful for brake system of light compact platform.