A Design of Large-Scale Speed Modulation in Hydraulic Cylinder and its Application
This paper presents a hydraulic controlling mode to drive a hydraulic differential cylinder with a wide range of speed options. Two different pumps are used to control the cylinder on both sides of the oil chambers by adjusting speed and direction of the pumps. To accomplish a precise position for the cylinder among the wide speed range, the pumps are driven by two servo motors. This control mode is applied on a wheelset assembly machine to ensure dimensional accuracy of pressed wheels on an axle.
Zhengyi Jiang and Chunliang Zhang
J. Xiao et al., "A Design of Large-Scale Speed Modulation in Hydraulic Cylinder and its Application", Advanced Materials Research, Vols. 97-101, pp. 3718-3721, 2010