Research Of Hydraulic Excavator’s Energy-saving Control System Based On Global Power Matching

With increasing energy shortage and the dramatic growth of the scale of hydraulicexcavator, Hydraulic excavator’s energy-saving research is necessary as high-power,high-energy consumption equipment, and the energy-saving performance will directlyaffect the economy and reliability of the excavator. Today, the rapid development ofcontrol technology provides the hardware foundation for the realization of theenergy-saving control of hydraulic excavator in the future. Aimed at the mismatch ofpower of hydraulic excavator, an energy-saving control scheme of hydraulic excavatorbased on the matching of global power was proposed. Therefore the main contents of thispaper were given as follows:First, the major power loss of hydraulic excavator was analyzed. The characteristicsof engine and hydraulic pump, and their control target were studied. A general scheme ofthe energy-saving control system of hydraulic excavators was designed.Secondly, in view of the complicated hydraulic excavator model, the model wasestablished by using the MATLAB/Simulink/Simscape toolbox, A fuzzy adaptive PIDcontroller was designed, combined with the ordinary PID, the simulation of control systemwas made using MATLAB. The simulation results show that the algorithm is better thanthe traditional fuzzy adaptive PID algorithm and has the advantages of short adjustmenttime, significantly reduced overshoot, good Anti-jamming. The control performance issignificantly improved.Once again the hardware and software of semi-physical simulation experimentplatform based on the dual system of xPC Target environment was designed. Thehardware, To of the Freescale MC9S12XEQ512MAL microcontroller as controller core,some peripheral circuits were designed, including power module, clock module, dataacquisition module, signal processing module, D/A converter module, etc. The software,in the CodeWarrior Development Studio for S12(X) V5.0integrated developmentenvironment. According to control requirements, the relevant register was set. Thesoftware designing was completed by module design method, including the initializationmodule, data sampling and processing module, A/D conversion module, control algorithmprocessing module, D/A chip driver module, etc. The C code for rapid prototyping of hydraulic excavator‘s experimental model was generated by MATLAB/Simulink/RTW.Finally, On-line debugging was conducted to complete the system test in the semiphysical simulation experiment platform based on dual system of xPC Target environment.The results show that, this scheme achieves the desired effect, high feasibility, and hascertain practical significance to the research of energy-saving control system for hydraulicexcavator.