scholarly journals Influence of eddy current on the dynamics of high speed switching valve.

1993 ◽  
Vol 24 (4) ◽  
pp. 504-510 ◽  
Author(s):  
Yasukazu SATO ◽  
Shojiro SATO ◽  
Hirohisa TANAKA ◽  
Yasuyuki YANAI
Keyword(s):  
Eddy Current ◽  
High Speed ◽  
Switching Valve ◽  
High Speed Switching

The Application of HPWM in Improving Vehicle Lateral Stability

2014 ◽  
Vol 936 ◽  
pp. 2171-2176
Author(s):  
An Jing Zhang ◽  
Yan Hai Xu ◽  
Xin Lv
Keyword(s):  
High Speed ◽  
Pulse Width Modulation ◽  
Control Unit ◽  
Lateral Stability ◽  
Hydraulic Control ◽  
Output Pressure ◽  
Switching Valve ◽  
High Speed Switching ◽  
Frequency Pulse

The application of the High-frequency pulse width modulation (HPWM) for improving vehicle lateral stability is investigated in the paper. Firstly, a hydraulic control unit (HCU) combined with a high-speed switching valve (HSV) for controlling hydraulic oil pressure by adjusting duty cycle is presented. Then, a typical control strategy is described based on the application of HPWM. Finally, by using a 15dofs vehicle model, a simulation is carried out to investigate the role of HPWM on improving vehicle lateral stability. The results show that HPWM is capable to control the output pressure of HSV accurately and improve vehicle lateral stability effectively.

The Optimal Design and Simulation Analysis of High-Speed Switching Valve Based on Magnetorheological Fluid

2013 ◽  
Vol 397-400 ◽  
pp. 465-469
Author(s):  
Ru Guang Feng ◽  
Zhang Yong Wu ◽  
Jing Tao Wei ◽  
Yan Jin Qin ◽  
Tian Chi Jia
Keyword(s):  
High Speed ◽  
Simulation Analysis ◽  
Magnetorheological Fluid ◽  
Optimized Design ◽  
Valve Body ◽  
Switching Valve ◽  
Flux Lines ◽  
Magnetic Flux Lines ◽  
Density Map ◽  
High Speed Switching

This article designed a kind of magnetorheological high-speed on-off valves and made optimized design based on the nature of the magnetorheological fluid(MRF). ANSYS software was used to analyze magnetic field of the two different structures and get the magnetic flux lines distribution and flux density map. The simulation analysis results show that: optimized high speed switching valve, can reduce the loss of the coil and the rise of temperature, improves the life of the valve body, it also can shorten the switching response time and improves the reliability of the valve.

Design and Performance Analysis Based on High-Speed Switching Valve of Magnetorheological Plug-Mounted

2012 ◽  
Vol 630 ◽  
pp. 106-109 ◽  
Author(s):  
Yun Han Liu ◽  
Zhang Yong Wu ◽  
Xian Wang ◽  
Zhen Hua Duan ◽  
Xiao Yan Gao ◽  
...  
Keyword(s):  
Performance Analysis ◽  
Intelligent Control ◽  
High Speed ◽  
Dynamic Performance ◽  
Magnetorheological Fluid ◽  
Switching Valve ◽  
Speed Of Response ◽  
And Performance ◽  
Dynamic Performance Analysis ◽  
High Speed Switching

Based on the rheological mechanism of magnetorheological fluid，we can design a kind of magnetorheological high-speed on-off valves,which used the Plug-in structure.It is shows that， through the static and dynamic performance analysis of the valves，the magnetorheological high-speed on-off valves not only has the good static, dynamic characteristics, compare to magnetorheological plug-mounted speed switch valve with traditional hydraulic, and with high speed of response, high stability, etc . It is an easy to achieve automatic control and intelligent control of the hydraulic components.

New Hydraulic Synchronization System Based on Fuzzy PID Control Strategy

2013 ◽  
Vol 819 ◽  
pp. 229-233
Author(s):  
Zhong Liu ◽  
Jia Chen ◽  
Kai Zhang
Keyword(s):  
Control Strategy ◽  
Pid Control ◽  
High Speed ◽  
Drive System ◽  
Fuzzy Pid ◽  
Fuzzy Pid Control ◽  
Synchronization System ◽  
Switching Valve ◽  
Synchronous Drive ◽  
High Speed Switching

Proposition of a high-speed switching valve pilot control of two-cylinder two-way electro-hydraulic synchronous drive system, the establishment of a mathematical model of the system, and using fuzzy PID control strategy designed controller, at the same time building a electro-hydraulic synchronization system simulation model based on fuzzy PID controller . Simulation results show that ,when using the fuzzy PID control strategy, slave cylinder of the synchronization system follow the initiative cylinder movement well, the peak-to-average speed of the slave cylinder is 20.3mm / s. Fuzzy PID control process according to the operating conditions change error and error change, by which it has automatic adjustment of PID parameters of the synchronization system. Therefore, fuzzy PID control has better adaptive ability, and the synchronization error is 0.04 mm, achieving high synchronization accuracy. Verifying that high-speed switching valve pilot control of the synchronous drive system and its control strategy is feasible.

scholarly journals Study on control performance of pilot high-speed switching valve

2017 ◽  
Vol 9 (7) ◽  
pp. 168781401770890 ◽  
Author(s):  
Shuang Wang ◽  
Bin Zhang ◽  
Qi Zhong ◽  
Huayong Yang
Keyword(s):  
Response Time ◽  
High Speed ◽  
Pulse Width Modulation ◽  
Oil Pollution ◽  
Duty Ratio ◽  
Main Stage ◽  
Switching Valve ◽  
Discrete Flow ◽  
Modulation Control ◽  
High Speed Switching

High-speed switching valves have been widely studied as pilot valves because of their advantages on easy digital control, low power loss, and non-sensitive to oil pollution. However, there are still lots of difficulties and problems between discrete flow and response time. In this article, two high-speed switching valves are used to pilot a three-way main stage valve. By adjusting the duty ratio of pulse width modulation control signals, the main stage can output continuous flow and pressure. The control performances of two pilot stage methods, which are high-speed switching valve and proportional valve, are compared through the theoretical analysis and the dynamic simulation. It is found that three factors directly affect the response time of the main stage, which are the control signal, the operating frequency of high-speed switching valve, and the pressure of the control chamber. The main valve can achieve better performance if optimized parameters are applied.

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