The Research of Hydraulic Cylinder Controlled by Digital Valve

Liu, Zhihao; Gao, Qing; Li, Jing-yue; Niu, Hailong

doi:10.11591/telkomnika.v12i5.4218

Cited by 1 publication

(1 citation statement)

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“…Ouyang et al 15 introduced an innovative high-speed on/off valve based on piezoelectric actuators and found that the maximal flow rate, pressure, and frequency of the valve were 11 L/min, 20 MPa, and 200 Hz, respectively, through simulation. Liu et al 16 researched on the precise position control of the hydraulic cylinder using the high-speed on-off valve. Wang et al 17,18 studied a novel hydraulic pressure-boost system utilizing the high-speed on-off valve and they observed that the system pressure could be successfully boosted from 50 to 116 bar for a duty ratio of PWM signal of 0.7.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of priority control system for high-speed on–off digital valve

Zeng

Wang

et al. 2015

Advances in Mechanical Engineering

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Dynamic characteristics of the priority control system are of great influence to the control effect, response speed, and working stability of the high-speed on–off digital valve. The main focus of this study is on revealing the dynamic properties of the priority control system for a developed high-speed on–off digital valve. In this article, a detailed introduction to the high-speed on–off digital valve and its priority control system is performed first, which includes the system function, structural composition, and operation principle. Thereafter, a simulation model of the priority control system is established using the AMESim software and the dynamic characteristics are simulated. Simulation results including the variations in the pulse-width modulation signal, coil current, and the main spool displacement of the directional valve are presented and discussed. They indicate that the opening time of the main spool increases with the duty ratio of the voltage signal. Moreover, the main spool displacement is basically equal in one single pulse-width modulation signal cycle, and thus, it is proportional to the cycle number of the pulse-width modulation signal. As a consequence, the priority control system possesses a good dynamic characteristic for the high-speed on–off digital valve as a pilot valve to achieve proportional control of main spool displacement for the directional valve.

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