Despite the great advantages it offers, such as high-power density, precise control and large
force output, conventional hydraulic valve control suffers from low energy efficiency due to …

Pilot two-stage proportional valves are widely used in high-power hydraulic systems. For the
purpose of improving the dynamic performance, reliability, and digitization of the traditional …

A continuously variable hydraulic pressure converter utilizing high-speed on–off valves is
studied in this paper. The hydraulic pressure converter is analogous to a switchmode buck …

Pulse number modulation (PNM) combined with pulse width modulation (PWM) control is an
effective solution to improve the resolution of digital valve systems. However, the numerous …

The work-class remotely-operated-underwater-vehicles (ROVs) are mainly driven by
hydraulic propulsion system, and the effeciency of hydraulic propulsion system is an …

This article concerns high accuracy positioning control with switching optimization for an
equal coded digital valve system. Typically, pulse number modulation control cannot realize …

The paper refers to four-port solenoid pilot operated valves, which are subplate mounted in
a hydraulic system in accordance with the ISO 4401 standard. Their widespread use in …

针对并联数字阀控系统在PNM (Pulse Number Modulation) 控制策略下易出现低速定位精度低
的问题, 提出一种复合控制策略, 即低速工况采用差动PWM (Pulse Width Modulation) 控制器 …

Research was completed to investigate the use of high-speed on\off valves in the control of
a hydraulic actuator. This work was completed as part of efforts to improve the accuracy and …

A unique method of improving energy efficiency in fluid power systems is called digital flow
control. In this paper, binary coding control is utilized. Although this scheme is characterized …