Modeling and simulation of hydraulic system for the multi-DOF hydraulic arm

This paper introduces application and hydraulic system´s working principle of the Multi-DOF hydraulic arm, adopts the power bond graph to establish the mathematical model of the hydraulic system, and uses the Matlab software to draw the Bode diagram of the open-loop system. The stability and other time domain performance of the hydraulic system are analyzed by using the engineering control theory, the results show that, on the premise of guaranteeing the system stability, the system could obtain good time domain performance, through increasing the open-loop gain coefficient properly. The results of simulation are useful for the design and dynamic analysis of the hydraulic system.