• Title/Summary/Keyword: Hydraulic select actuator

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A Study on the Design Paramter of a Hydraulic Shift Actuator of an AMT (자동화 수동변속기의 변속 조작용 유압 액츄에이터의 설계 변수에 관한 연구)

  • Song, Chang-Seop;Lee, Sang-Hyun
    • Journal of the Korean Society for Precision Engineering
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    • v.24 no.10
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    • pp.75-82
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    • 2007
  • The AMT(Automated Manual Transmission) has been developed by utilizing the auto clutch system and the automatic shift mechanism, to automate the clutch operation and shift operation of the existing MT(Manual Transmission). The use of hydraulic actuator for each actuator of the clutch and gear has realized a reduction of fuel consumption and exhaust emission. In this paper, we develop a simulator for the transmission control system of the AMT using AMESim. The developed simulator can be applied to design the hydraulic select actuator system of an AMT.

A study on development of hydraulic active suspension system (유압식 능동 현가시스템의 개발에 관한 연구)

  • 장성욱;박성환;이진걸
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10b
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    • pp.1459-1464
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    • 1996
  • The most important parameter for hydraulic active suspension system is to sustain desirable vehicle maneuvering stability and ride comfort without increasing consumption power. The performance of hydraulic active suspension system depends on damping force of body damping valve and piston damping valve. Hydraulic actuator design and damping valve parameter selection are essential and basic procedure to design hydraulic active suspension system. This paper is on computer simulation with use of mathematical model that was delivered from dynamic characteristic of hydraulic actuator, as know basic damping characteristics of hydraulic active suspension system. The aim of this paper is to select the system parameter that affect mainly hydraulic active suspension, and identify the validity on the system parameter selection.

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A Study on the Application and Design of Hydraulic Active Suspension System (유압식 능동 현가시스템의 설계 및 적용에 관한 연구)

  • Jang, Seong-Uk;Lee, Jin-Geol
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.4
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    • pp.683-692
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    • 2002
  • The most important parameter for hydraulic active suspension system is to sustain desirable vehicle maneuvering stability and ride comfort without increasing power consumption. The performance of hydraulic active suspension system depends on damping force of body damping valve and piston damping valve. Hydraulic actuator design and damping valve parameter selection are essential and basic procedure to design hydraulic system. This paper is on computer simulation with use of mathematical model that was delivered from dynamic characteristic of hydraulic actuator, as know basic damping characteristics of hydraulic active suspension system. The aim of this paper is to select the system parameter that affect mainly hydraulic active suspension, and identify the validity on the system parameter selection.

A Study on the Wear Testing of Sliding Members of Hydraulic Rotary Actuator (유압피스톤 모터용 습동부재의 마모실험에 관한 연구)

  • Kim, Gwang-Yeong;Ryu, Byeong-Sun;Kim, Jong-Su;Choe, Byeong-O;Yun, Du-Pyo
    • 연구논문집
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    • s.28
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    • pp.101-110
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    • 1998
  • This study discusses the developement of hydraulic rotary actuator design technology for industrial machinery and earthmoving equipment. The lubrication and wear analysis of sliding components of the machinery are very important parameters to strength the design technique. The analysis and wear test are performed for the selected materials of the above mentioned coupled sliding members. The can be used to select the better combinations of sliding components.

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Determination of PID Coefficients for the Ascending and Descending System Using Proportional Valve of a Rice Transplanter

  • Siddique, Md. Abu Ayub;Kim, Wan-Soo;Baek, Seung-Yun;Kim, Yeon-Soo;Choi, Chang-Hyun;Kim, Yong-Joo;Park, Jin-Kam
    • Journal of Biosystems Engineering
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    • v.43 no.4
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    • pp.331-341
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    • 2018
  • Purpose: This study was conducted to develop a linear Proportional-Integral-Derivative (PID) control algorithm for the ascending and descending system of a rice transplanter and to analyze its response characteristics. Methods: A hydraulic model using a single-acting actuator, proportional valve and a PID control algorithm were developed for the ascending and descending system. The PID coefficients are tuned using the Ziegler-Nichols (Z-N) method and the characteristics of unit step response are analyzed to select the PID coefficients at various pump speeds. Results: Results showed that the performance of the PID controller was superior in any condition. It was found that the highest settling time and maximum overshoot were less than 0.210 s and 5%, respectively at all pump speed. It was determined that the steady state errors were 0% in all the cases. The lowest overshoot and settling time were calculated to be nearly 2.56% and 0.205 s, respectively at the pump rated speed (2650 rpm). Conclusions: The results indicated that the developed PID control algorithm would be feasible for the ascending and descending system of a rice transplanter. Finally, it would be helpful to plant the seedlings uniformly and improve the performance of the rice transplanter.