• Title/Summary/Keyword: 압력 비례 제어 밸브

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Thrust Vectoring Control of Supersonic Jet Using Proportional Control Valves (비례제어밸브를 이용한 초음속 제트의 추력편향 제어)

  • Lee, MyungYeon;Lee, Yeol
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.47 no.1
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    • pp.1-8
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    • 2019
  • An experimental study is performed to observe the characteristics of the thrust vectoring control (TVC) of the supersonic jet using proportional control valves. It is observed that three different TVC characteristics exist as the nozzle pressure ratio varies. Strong hysteresis phenomena are also observed during the valve control for a certain range of the nozzle pressure ratio. It is also noticed that the secondary chamber pressure is one of the influencing parameters for the TVC. Therefore, a control algorithm utilizing the secondary chamber pressure coefficient as a predictor is applied to achieve the stable TVC avoiding the hysteresis. Consequently, the stable TVC with the maximum deflection angle of about 20-degree has been realized using the proportional control valves.

Analysis of dynamic characteristics of proportional control valve for auto-steering tractor (자동 조향 트랙터용 비례제어밸브의 동특성 분석)

  • Min, Yee-Seo;Kim, Yong-Joo;Kim, Wan-Soo
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.15 no.5
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    • pp.349-359
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    • 2022
  • The aim of this study is to analyze the dynamic characteristics of proportional control valves according to various working conditions as a basic study for developing proportional control valves for auto-steering tractors. The dynamic characteristics of proportional valves were measured using hydraulic characteristics measurement system, and the power was analyzed using measured flow rate and pressure data. As the experimental conditions, the tractor engine speed and steering angle was selected as the main variables, and the experiment was performed on urethane road conditions. As a result, it was found that the flow rate, pressure, and power of the proportional control valve increased as the tractor engine speed and steering angle increased. In particular, as the steering angle increased at the same engine speed, the flow rate, pressure, and power tended to increase by up to 190%, 172%, and 273%, respectively. Similarly, as the engine speed increased at the same steering angle, the flow rate, pressure, and power tended to increase up to 161%, 122%, and 168%, respectively. Therefore, it can be seen that the steering angle has a higher influence on the dynamic characteristics of the proportional control valve than the engine speed.

A Study on PID Control Law's Realization for 2-Stage Proportional Pressure Control Valve with Analog Controller (아날로그 PID 제어기를 이용한 2단 비례 압력 제어 밸브의 실현에 관한 연구)

  • Yun, S.N.;Jeong, H.H.
    • Journal of Drive and Control
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    • v.9 no.4
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    • pp.58-61
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    • 2012
  • The customers who used the hydroulic system desire the product that has more detailed specification quickly during the industrial technology is developed. Every researcher try to reduce the developed period and to satisfy the customers' desire. Lot's of simulation software and hardware already was used to be satisfied those purpose. But these kind of equipment need a lot of cost to set up and technical knowledge to drive that system. This paper concerns about analog PID controller that can be assembled with a few resistor, condenser and optional amplifier and doesn't need technical knowledge to drive. At the first, the plant was modeled mathematically to design the analog PID controller's circuit. After that, PID controller's parameter was selected by customers' desire. Finally, the analog PID controller's circuit was assembled from the control law. The circuit's availability was confirmed by step response test in the controlled system.

Development of a Hall-thruster Propulsion Controller for Science Technology Satellite-3 (과학기술위성3호 홀 추력 제어기 개발)

  • Rhee, Sung-Ho;Cho, Hee-Keun;Lyou, Joon
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.38 no.10
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    • pp.992-997
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    • 2010
  • The Propulsion Control Module(PCM) of Hall-thruster Propulsion System(HPS) for Science and Technology Satellite-3 (STSAT-3) has the flow control accuracy of less than ${\pm}$3% and the pressure control accuracy of less than ${\pm}$5%. The pressure controller adjusts pressure around the set point by using a Proportional Flow Control Valve (PFCV) and a high pressure transducer, while the flow controller regulates the flow rate using PFCV and the anode current telemetry of the Hall Thruster. The controllers are chosen as the Proportional and Integral(PI) type, and the PI gains are tuned based on the Matlab simulations. The result of the PCM test had the flow control accuracy of less than ${\pm}$1.87% and the pressure control accuracy of less than ${\pm}$5%. This paper describes the design, realization, and performance test results of the PCM.

Dynamics Analysis of Pressure Control Characteristics in a Variable Pressure Solenoid Valve (비례제어방식 솔레노이드 밸브 압력제어특성에 관한 동적해석)

  • 김형만;태혁준;이현우;이창훈
    • Transactions of the Korean Society of Automotive Engineers
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    • v.11 no.6
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    • pp.80-85
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    • 2003
  • In the present paper, dynamics analyses of pressure control characteristics have been performed in a variable pressure solenoid valve. A number of solenoid valves have been used in the electronic control system, especially automatic transmission of an automobile. Variable pressure solenoid valve is intended to produce spatial movement by the electrical signal. Dynamics analyses of pressure control characteristics have been practiced by the Finite Difference Method, which show the pressure distribution in the solenoid valve. The results of numerical analyses show the dependence of pressure distribution on the displacement of the spool in the solenoid valve, and then, are compared with the experimental results.

Optimization Design and Development of the Proportional Pressure Control Valve Analysis Model of Active Body Control (차량 자세제어 시스템의 비례압력제어밸브 해석모델 개발 및 최적화 설계)

  • Kim, Dongmyung;Jang, Joosup;Son, Taekwan
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.7
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    • pp.127-134
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    • 2014
  • Active body control system is an important system for determining the driving stability and ride comfort of the vehicle. Active body control system is composed of a cylinder unit power supply unit, and control valve unit. Control valve is a proportional pressure control valve, the dynamic characteristics of the valve affects the performance of the active body control system. We have developed an analytical model, we analyzed the design parameters of the proportional pressure control valve. Further, by knowing the design parameters effect on the system and to optimize the design parameters, and improved performance of the dynamic properties.

Pressure Control Characteristics of Proportional Pressure Reducing Valve (비례감압밸브의 압력제어특성)

  • Yun, S.N.;Ham, Y.B.;Jo, J.D.
    • Journal of Power System Engineering
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    • v.7 no.1
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    • pp.68-73
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    • 2003
  • The purpose of this study is to develop a new proportional pressure reducing valve and to verify the validity of a new mechanism with pressure control pin. The dynamic characteristics of the object pressure reducing valve was studied by numerical analysis of the mathematical model. Also, static and dynamic characteristics of the new pressure control valve were tested with a testing system based on the test standard.

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Pressure Control Valve using Proportional Electro-magnetic Solenoid Actuator (비례솔레노이드 액추에이터를 이용한 압력제어밸브)

  • Ham Young-Bog;Park Pyoung-Won;Yun So-Nam
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.30 no.10 s.253
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    • pp.1202-1208
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    • 2006
  • This paper presents an experimental characteristics of electro-hydraulic proportional pressure control valve. In this study, poppet and valve body which are assembled into the proportional solenoid were designed and manufactured. The constant force characteristics of proportional solenoid actuator in the control region should be independent of the plunger position in order to be used to control the valve position in the fluid flow control system. The stroke-force characteristics of the proportional solenoid actuator is determined by the shape (or parameters) of the control cone. In this paper, steady state and transient characteristics of the solenoid actuator for electro-hydraulic proportional valve are analyzed using finite element method and it is confirmed that the proportional solenoid actuator has a constant attraction force in the control region independently on the stroke position. The effects of the parameters such as control cone length, thickness and taper length are also discussed.