Study On Matching Of High Frequency Vibration Roller’s Power System

Since scientific configuration of its vibration mode (vibration frequency/amplitude), highfrequency vibration roller meets both the thick layer of compaction and thin layer ofcompaction, meanwhile compacting bridge deck pavement. Therefore, application andprospect of high frequency vibration roller are quite good for present.By the prototype’s experiments, it is found that characters of asphalt mixture make theprocess of starting-stopping of the machine realized uneasily. And it is strict requirements thatgive the engine matching of high frequency vibration roller much more difficult. Now weexplore ways to make a rational match for reducing the power configuration of the engine asfar as possible and improving its power efficiency and economy with the vibrationrequirements.The related literatures at home and abroad tell us that the problem above of the highfrequency vibration roller cannot be solved by the way that power matching used in thetraditional vibratory roller. All in all, it has practical and theoretical meaning for studyingengine matching of high frequency vibration roller.This paper adopts experiments、theory analysis and simulation. Firstly, we makeprototype’s experiments, which help us understand performance requirements and powerconsumption of high frequency vibration roller under the condition of vibration compaction.Secondly, the paper analyzes its Engine, travelling system and vibration system in theory, andthen building mathematical model in accordance with the prototype. Thirdly, simulationmodel is established in MATLAB/Simulink, taking advantage of the above mathematicalmodel. Finally, the paper uses the simulation model for analyzing the fundamental reason andthe specific controlling factors on engine matching.By the simulation analysis, the primary cause affecting engine match is engine peakloadand the peakload is mainly influenced by inertial load overlay of two systems. In order toreach the purpose of reducing engine power allocation, we should reasonably controlvibration and driving hydraulic systems to indirectly control the inertial load and the stackresults, further making the peakload of the engine smoothly working at the rated torque point.That is to say, as for high frequency vibration roller, engine matching is related with not onlythe engine, but also the whole dynamic system with the engine and hydraulic transmissionsystem。We also find that different from other engineering machines the worst conditions ofmatching engine of high frequency vibration roller is not the worst conditions in a real sense, due to fully taking the engine economy into consideration. According to the utmost severecondition mentioned before, coefficient of torque adaptability and speed adaptive coefficientare found, which have the significant effects on the engine matching, and then these twofactors are discussed in the paper.In the final part, the paper shows us the principles of engine matching with highfrequency vibration roller by analyzing the above problems.