A Method on Power-matching Control of Hydraulic Excavator

Of the methods on power-matching control of hydraulic excavator now, the rotary inducing control is commonly used buthas shortcoming of response lag. According to the dynamic characteristics of diesel engine and hydraulic pump in power system ofhydraulic excavator, method of constant torque control combined with rotation speed feedback control is proposed, the systemsimulation model is established in Simulink, with the load signal in actual condition imported to the model, the two control methodsare analyzed. The result indicate that the method of constant torque control combined with rotation speed feedback can stabilize theengine's speed and reduce the maximum lose of engine speed, make the hydraulic pump can make full use of the engine, so thatelevate the excavator's effect.