Design and Simulation of Intelligent Lifting System Based on Digital Hydraulic Cylinder

In recent years, digital hydraulic cylinder technology has been greatly developed. In order to improve the accuracy of automatic leveling of the aerial working platform during lifting, an intelligent lifting system (ILS) is designed, which consists of four inter-connected parts: the simple single straight arm, the variable-amplitude cylinder, the digital hydraulic cylinder and the working platform. Specially, the structural characteristics and working principles of the digital hydraulic cylinder, the kinematics model and the dynamics analysis of the ILS are described in detail. The Matlab/Simulink tool is used to perform a simulation. The simulation results show that the ILS is stable enough. And the experiment data show that the leveling accuracy of the ILS can be controlled within [-1, 1]0 even when it is affected by the surrounding environment. The ILS can be applied to a series of engineering operations such as aerial working systems, fire protection systems, street lighting control and so on.