• 제목/요약/키워드: Driving type

검색결과 1,503건 처리시간 0.037초

파워스티어링용 유압펌프의 일체형 풀리 개발 (Development of Monolith Type Driving Pulley of Power Steering Hydraulic Pump)

  • 이춘태
    • 유공압시스템학회논문집
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    • 제7권4호
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    • pp.9-14
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    • 2010
  • Most power steering systems work by using a hydraulic system to turn the vehicle's wheels. The pressure is usually provided by a hydraulic pump driven by the vehicle's engine. A double-acting hydraulic cylinder applies a force to the steering gear, which in turn applies a torque to the steering axis of the road wheels. The flow to the cylinder is controlled by valves operated by the steering wheel ; the more torque the driver applies to the steering wheel and the shaft it is attached to, the more fluid the valves allow through to the cylinder, and so the more force is applied to steer the wheels in the appropriate direction. Since the pumps employed are of the positive displacement type, the flow rate they deliver is directly proportional to the speed of the engine. And for a long time, the type of hydraulic pump pulley was boss welding type. But recently, monolith type driving pulley is widely used. Therefore in this paper we studied the safety of monolith type driving pulley to the extracting force and endurance by FEM analysis and experiments.

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6자유도 주행 시뮬레이터 구동을 위한 제어기 설계 및 성능평가 (A Controller Design and Performance Evaluation for 6 DOF Driving Simulator)

  • 강진구
    • 디지털산업정보학회논문지
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    • 제8권1호
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    • pp.1-7
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    • 2012
  • In this paper Vehicle driving simulator have been used in the development and modification of models. A real-time simulation system and washout algorithm for an excavator have been developed for a driving simulator with six degrees of freedom. An interesting question, "how the 6 DOF Driving Simulator can be controlled optimally for the various tasks?" is not easy to be answered. This paper presents the hardware and software developed for a driving simulator of construction vehicle. A simulator can reduce cost and time a variety of driving simulations in the laboratory. Using its 6 DOF Simulator can move in various modes, and perform dexterous tasks. Driving simulators have begun to proliferate in the automotive industry and the associated research community. This effort involves the real-time dynamic of wheel-type excavator the design and manufacturing of the Stewart platform an integrated control system of the platform and three-dimensional graphic modeling of the driving environments.

수·전동 휠체어 구동부 시스템 설계 (Design of Electric Automatic Manual Wheelchair Driving System)

  • 김진남
    • 한국산학기술학회논문지
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    • 제14권11호
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    • pp.5392-5395
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    • 2013
  • 환자 및 노약자 이동에 중요한 역할을 하고 있는 수 전동휠체어의 핵심부인 구동부를 새롭게 설계했다. 구동부는 고속모터와 다단기어 치형을 설계적용하고, 굽힘강도와 면압강도를 고려해 큰 추진력을 얻을 수 있도록 성능을 검증하였다. B-Type의 마찰판식 클러치 전자식 브레이크(다판 방식의 무여자 작동형)를 동 축상에 설치해, 큰 토크에도 급격한 제동이 가능하도록 했다. 본 연구에 설계된 다단치차 감속기를 수 전동휠체어 구동장치에 사용하므로서, 소형화, 경량화를 이루고 구동 효율이 기존제품보다 30% 향상된 구동부를 구성할 수 있었으며, 보수 및 관리의 용이성을 함께 추구했다.

경계형 차량 구동용 허브 bldc 전동기 구동시스템 설계 (Design of a Hub BLDC Motor Driving Systems for the Patrol Vehicles)

  • 박원석;권영;이상훈;최중경
    • 한국정보통신학회:학술대회논문집
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    • 한국정보통신학회 2013년도 추계학술대회
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    • pp.612-615
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    • 2013
  • 허브(hub) BLDC(Brushless Direct Current) 전동기란 아우터로터 타입 고효율 전동기로 다극의 영구자석으로 이루어진 회전자가 바퀴의 구동축이 되는 직접구동용 모터를 말하며, 휠인모터라고도 불린다. 본 연구에서는 허브모터를 구동축으로 갖는 2륜 또는 3륜 구동체를 구동하기 위한 BLDC 허브모터 속도 제어기를 PIC 마이크로 컨트롤러를 이용하여 설계한다. 구동기는 6 개의 독립된 MOSFET 스위칭소자를 사용하여 구성하며, 게이트 구동회로는 직접 설계하여 경제성을 높인다.

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A Driving Simulator of Construction Vehicles

  • Kwon Son;Goo, Sang-Hwa;Park, Kyung-Hyun;Yool, Wan-Suk;Lee, Min-Cheol;Lee, Jang-Myung
    • International Journal of Precision Engineering and Manufacturing
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    • 제2권4호
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    • pp.12-22
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    • 2001
  • Vehicle driving simulators hale been used in the development and modification of models. A simulator can reduce cost and time through a variety of driving simulations in the laboratory. Recently, driving simulators have begun to proliferate in the automotive industry and the associated research community. This paper presents the hardware and software developed fur a driving simulator of construction vehicles. This effect involves the real-time dynamic analysis of wheel-type excavator, the design and manufacturing of the Stewart platform, an integrated control system of the platform, and three-dimensional graphic modeling of the driving environments.

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건설 중장비용 주행 시뮬레이터의 구현 (A Driving Simulator of Construction Vehicles)

  • 손권;구상화;유완석;이민철;이장명
    • 한국정밀공학회지
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    • 제16권6호
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    • pp.66-76
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    • 1999
  • Vehicle driving simulators have been used in the development and modification of models. A simulator can reduce cost and time through a variety of driving simulations in the laboratory. Recently, driving simulators have begun to proliferate in the automotive industry and the associated research community. This paper presents the hardware and software developed for a driving simulator of construction vehicles. This effor involves the real-time dynamic analysis of wheel-type excavator, the design and manufacturing of the Stewart platform, an integrated control system of the platform, and three-dimensional graphic modeling of the driving environments.

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릴리프밸브 쿠션기구 내장형 공기압 실린더의 구동 특성 (Driving Characteristics of Pneumatic Cylinder with Relief Valve Cushion Devices)

  • 김도태
    • 드라이브 ㆍ 컨트롤
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    • 제13권4호
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    • pp.7-13
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    • 2016
  • This paper presents the meter-out and meter-in speed control characteristics of a pneumatic cylinder with relief valve type cushion device. The piston displacement and velocity are measured to investigate high speed driving performance with variation of the pressure setting in relief valve, air supply pressure, load mass, the supply and exhaust flow rate from the cylinder. Also, the internal pressures and temperatures driving pressure and cushion chamber are measured. The piston displacements and velocities of meter-out and meter-in control are compared experimentally determined data. A comparison experimental data meter-out and meter-in control show that a relief valve type cushion device is suitable for high speed pneumatic cylinders. The desired response characteristics of piston displacement and velocity are satisfactory adjust the pressure setting of a relief valve with varying system parameters such as air supply pressure, load mass and controlled flow rate.

의사 DC 방전용 형광등 전자 안정기에 관한 연구 (A Study on Pseudo DC Discharging Electronic Bal lasts for Fluorescent Lamp)

  • 이범익;정화진;지철근
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 1992년도 추계학술발표회논문집
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    • pp.11-15
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    • 1992
  • Currently-using low-pressure lamps are usually drivel by the AC power supply. There are good and bad points according to high or low frequency in AC power driving type. For the low-pressure lamps, its efficiency increases and flicker decreases when it ignites at high frequency. So we already use the high-frequency electronic ballast of the low-pressure discharge lamps broadly. But there are EMI interference in high-frequency driving type because of giving the fluorescent lamp the high- frequency current. So recently, we have a tendency to compensate for that defects by DC driving method. As follows, we suggest pseudo DC discharging electronic bar lasts for fluorescent lamps which have the characteristics of high efficiency and no flicker by driving constant current boosted square wave.

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입력분기방식 하이브리드 전기자동차의 구동계 구조에 따른 동력 성능 비교 분석 (Comparative Study of Different Drive-train Driving Performances for the Input Split Type Hybrid Electric Vehicle)

  • 김정민
    • 한국기계가공학회지
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    • 제16권4호
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    • pp.69-75
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    • 2017
  • In this study, the performances of five input split type hybrid electric vehicle sub-drivetrains were analyzed. The five sub-drivetrains consist of chain, helical gears and planetary gears. For the analyzing above five sub-drivetrains, the mathematical equations were derived. From the analysis, we found that the sub-drivetrain with chain shows slower acceleration performance and larger energy consumption on the city driving. And, the sub-drivetrain with only helical gear shows smallest energy consumption on the city driving. If the sub-drivetrain can change its gear speed, it shows fastest acceleration performance, but it has largest energy consumption on the city driving due to its additional auxiliary components.

Implementation of Low-cost Autonomous Car for Lane Recognition and Keeping based on Deep Neural Network model

  • Song, Mi-Hwa
    • International Journal of Internet, Broadcasting and Communication
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    • 제13권1호
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    • pp.210-218
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    • 2021
  • CNN (Convolutional Neural Network), a type of deep learning algorithm, is a type of artificial neural network used to analyze visual images. In deep learning, it is classified as a deep neural network and is most commonly used for visual image analysis. Accordingly, an AI autonomous driving model was constructed through real-time image processing, and a crosswalk image of a road was used as an obstacle. In this paper, we proposed a low-cost model that can actually implement autonomous driving based on the CNN model. The most well-known deep neural network technique for autonomous driving is investigated and an end-to-end model is applied. In particular, it was shown that training and self-driving on a simulated road is possible through a practical approach to realizing lane detection and keeping.