• 한국산업융합학회 논문집
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• 제9권1호
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• pp.67-72
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• 2006

This study is on the development of algorithm of surge test for quality control on electrical parts of throttle body in automobiles with internal combustion engine, not only to know its condition to be good or not, but also jugding its condition to be classified into six types. To know whether its condition to be good or not, comparing and analyzing between two waveforms generated from master and test coil of throttle body. If test net area is below 20% of master area, the condition of test coil is good. By analyzing test coil waveform to master coil waveform, the condition of test coil into winding badness, insulation badness, layer and corona discharge, short badness should known. Therefore quality control system on electrical parts of throttle body should be developed.

• Journal of international Conference on Electrical Machines and Systems
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• 제2권1호
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• pp.97-103
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• 2013

This paper describes the characteristics of Electronic Throttle Controller (ETC) module in BLDC motor without the hall sensor for detecting a rotor position. The proposed ETC control system, which is mainly consisted of a BLDC motor, a throttle plate, a return spring and reduction gear, has a position sensor with an analogue voltage output on the throttle valve instead of BLDC motor for detecting the rotor position. So the additional commutation information is necessarily needed to control the ETC module. For this, the estimation method is applied. In order to improve and obtain the high resolution for the position control, it is generally needed to change the gear ratio of the module or the electrical switching method etc. In this paper, the 3-phase switching between successive commutations is adapted instead of the 2-phase switching that is conventionally used. In addition, the position control with a variable PI gain is applied to improve a dynamic response during a transient period and reduce vibration at a stop in case of matching position reference. The mentioned method can be used to estimate the commutation state and operate the high-precision position control for the ETC module and the high response characteristics. The validity of the proposed method is examined through the experimental results.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.50-52
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• 2007

Throttle Control 장치는 차량의 지능화와 연료 절감의 이유로 기계식에서 전기적 신호의 연결로 구동시키는 시스템으로 발전하고 있다. 전기 전자 시스템을 도입한 ETC(Electronic Throttle Control)의 구성요소 중 필수적인 구동 원으로 DC모터를 많이 사용하고 있지만, DC모터는 정류작용 시 브러시의 스파크를 발생시키는 단점을 가진다. 이에 전기적 및 기계적 Noise가 적고 신뢰성이 높으며 수명이 긴 BLDC 모터의 개발이 필요하다. 이에 BLDC 모터의 기초 설계와 최적 설계를 통해 형상을 설계하고 이를 정자계 유한요소법을 이용하여 해석하고 목표 토크인 0.2[Nm]에 적합한 BLDC 모터를 설계하였다.

• 대한기계학회논문집A
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• 제34권10호
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• pp.1359-1366
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• 2010

최근 많은 전자제어기술이 개발되고 있으며 또한 차량에 적용되고 있다. 이러한 기술들 중 throttle-by-wire, brake-by-wire, steer-by-wire 와 같은 X-by-wire 가 대표적이며 이는 기계적으로 연결된 부분이 전기적인 신호나 액추에이터로 대체된 것이다. 본 논문에서는 스쿨존에서의 차량의 속도 제어를 위하여 throttle-by-wire, brake-by-wire 가 고려되었으며 특히 스쿨 존에서는 다른 지역에 비해 사고가능성이 높다. 그 이유는 보행자가 횡단 시에 다수의 운전자들이 규정속도를 지키지 않기 때문이다. 따라서 본 논문에서는 스쿨 존에서 규정속도 내로 주행하도록 throttle-by-wire, brake-by-wire 를 이용하여 차량을 감속 제어하였으며 이를 위하여 양산차량의 엔진과 변속기의 제원을 사용하였다. 둘째, 차량의 감속에 있어서 운전자와 승객이 불쾌감을 느낄 수 있는 급격한 감속을 줄이기 위하여 제안된 3 차 궤적 추종법을 적용시켰으며 궤적 추종을 위하여 퍼지-PID 제어를 사용하였다. 마지막으로 시뮬레이션을 통하여 제안된 차량의 감속 제어 시스템의 성능을 확인하였다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.637-638
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• 2008

최근 하이브리드 전기자동차의 관심이 높아짐에 따라 전기적 신호의 연결로 구동 시스템을 구성하는 X-by-wire기술 연구가 활발하게 이루어지고, 있다. 그 중 Drive시스템을 관장하는 Throttle-by-Wire 기술의 일환으로 ETC(Electronic Throttle Control)장치에 대한 연구가 진해되고 있으며, 일부 제품이 출시되고 있다. ETC 구성요소 중 가장 핵심인 모터 설계를 위해 본 논문에서는 우수한 성능을 가지는 BLDC 모터를 선택하고, 기초 설계를 통해 그 형상을 설계하였으며, 보다 더 높은 효율과 출력 토크를 얻기 위해 회전자 영구자석의 재질과 형상을 변화시키며 효율과 출력 토크에 미치는 영향을 살펴보았다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 추계학술대회 논문집 학회본부
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• pp.697-702
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• 1997

Control system of electric machine systems is often required to provide the good control performance even in the presence of various variable loads. In this study, time delay control technique is adopted to overcome such variable loads. Also, in this research a new approach of avoiding saturation by varying the reference model for the time delay control based systems subject to the step changes in reference inputs. These schemes are verified by applications to the position controls of the AC servo motor system and the engine throttle actuator.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1989년도 추계학술대회 논문집 학회본부
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• pp.430-433
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• 1989

This paper describes dynamic engine model that is appricable to idle speed control system development. A basic linear engine model responds to throttle and load torque Inputs to provide manifold pressure and speed outputs. Transfer functions are then derived for the modified linear engine model and significant dynamic characteristics are discussed. Lastly, the strategy for controlling idle speed uses the linear optimal control theory. The linear optimal regulator was designed using a state variable and the performance Index was minimized.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 B
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• pp.491-494
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• 1997

In this paper, we suppose a fuzzy logic controller for cruise control of vehicle. Generally, fuzzy logic controller is known as a controller which can be coped with a non-linear and a complex system. The proposed fuzzy logic controller consists of three input variables; that is, a desired speed, a current vehicle speed, and a current acceleration, and one output variable, throttle angle. The supposed fuzzy logic controller is for engine speed control system is implemented on 80586 microprocessor with DT-2801.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2005년도 ICCAS
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• pp.910-914
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• 2005

In this paper an optimal method based on fuzzy logic for controlling parallel hybrid electric vehicles is presented. In parallel hybrid electric vehicles the required torque for deriving and operating the on-board accessories is generated by a combination of internal-combustion engine and an electric motor. The powersharing between the internal combustion engine and the electric motor is the key point for efficient driving. This is a highly nonlinear and time varying plant and its control strategy will be implemented with the use of fuzzy logic controller. The fuzzy logic controller will be designed based on the state of charge of batteries and the desired torque for driving. The output of controller controls the throttle of the combustion engine. The main contribution of this paper is the development of an optimal control based on fuzzy logic, which maximizes the output torque of the vehicle while minimizing fuel consumed by the combustion engine.

• International Journal of Fluid Machinery and Systems
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• 제10권2호
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• pp.176-188
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• 2017

The nozzle-flapper valves are widely applied as a pilot stage in aerospace and military system. A subject of the analysis presented in this work is to find out a reasonable range of null clearance between the nozzle and flapper. This paper has presented a numerical flow coefficient simulation. In every design point, a parameterized model is created for flow coefficient simulation and cavitation under different conditions with varying gap width and inlet pressure. Moreover, a new test device has been designed to measure the flow coefficient and for visualized cavitation. The numerical simulation and test results both indicate that cavitation intensity gets fierce initially and shrinks finally as the gap width varies from small to large. From the curve, the flow coefficient mostly has experienced three stages: linear throttle section, transition section and saturation section. The appropriate deflection of flapper is recommended to make the gap width drop into the linear throttle section. The flapper-nozzle null clearance is optionally recommended near the range of $D_N/16$. Finally through simulation it is also concluded that the inlet pressure plays a little role in the influence on the flow coefficient.