Study On Power Matching Method Of Hydraulic Excavator Using Differential Conversion

As the urbanization accelerates, the utilization of the engineering machineryincreases progressively year by year, which makes the energy conservation a keyresearch topic in today’s engineering machinery field in an attempt to improve theenergy efficiency of engineering machinery.First of all, the hydraulic excavator with the negative flow control system ischosen as the study object on the analysis and by comparison of both domestic andforeign energy saving control systems, combining with the actual productionconditions. The principle and method of power matching control technology are thenclarified according to the power losses of the excavator and operating characteristicsof the diesel, thus putting forward the main point of the study.Secondly, it simply introduces the energy-saving control method in divisionworking condition and automatic idle speed control method, which are generallypossessed in the current excavator and draws forth the speed sensing control strategywhich is applied widely in the current. Through the analysis of the deficiency inspeed control, the difference frequency control strategy is put forward, and the overallcontrol scheme is given.After that, the hydraulic simulation model of the hydraulic excavator is built viathe software AMESim in the light of the hydraulic structure diagram, so as to betteranalyze the operating conditions of the hydraulic excavator and comprehensivelyunderstand the parameter changes in the work.Finally, in order to analyze the control effect of the differential conversioncontrol strategy, we use AMESim and Simulink to built differential frequencyco-simulation model in the foundation of the hydraulic system simulation model setup. And then the PID parameters of the passband edge frequency and high frequencytransfer difference signals are integrated, and the accuracy of passband edgefrequency control practical strategy and the utility of the differential conversioncontrol strategy are verified. With the co-simulation of AMESim and Simulink, this paper introduces how tobuild the simulation model of the differential conversion control strategy for thehydraulic excavator, and analyzes the operation results, which indicates that thepre-simulation has been reached, under different conditions. In the end, speed controlperformance of the two methods, difference frequency control strategy and the speedsensing control strategy are contrasted in the co-simulation platform. The resultsshow that the difference frequency control strategy has better speed controlperformance and great research value to promote energy-saving control effect ofexcavator.