Abstract:Aiming at high energy consumption of large erecting equipment,a load model of the hydraulic system was built,and the load characteristics without disturbance were analyzed.A hydraulic system matched load was built.The true load was equivalent to a brokenline load,which was set as a constant load at the beginning and end of erection,and a linear load at the middle stage,so as to match the driving system pressure with the load force and ensure that there was a surplus of system pressure.Then the hydraulic drive system and pressure switched control strategy matching the load characteristics were designed,and the energy consumption of the erection system was reduced through the pressure switching control.At last,the hydraulic system characteristic was analyzed by simulation.The results show that the system is reliable and stable,and energy consumption decreases more than 56%.A useful method is provided to large erecting equipment design and control.