基于模糊数学的挖掘机整机性能评价研究

Evaluation research on machine performance of excavator based on fuzzy mathematics

针对挖掘机整机性能难以客观评价的问题,提出基于模糊数学的多因素评价方法。采用对标法对难以量化的挖掘机整机性能因素权重分配,利用定量信息将影响因子模糊数学化,可减小主观性影响。试验样机整机性能模糊评价因子为0.949 9,比中端机型高,与高端机型最相近,其操作性优越,并兼具经济性及可靠性。对评价结果进行试验验证,试验样机振动噪声性能较好,工作装置单动作、回转与高端机型相当;在复合动作中,动臂提升加回转时间虽增加6.5%,但液压缸行程百分比仅减小3.6,铲斗提升高度百分比仅下降3.9,且装车高度与高端机型相当。试验结果与操作手得分一致,模糊评价方法的准确性得以验证。

In response to the problem of difficulty in objectively evaluating the machine performance of excavators,a multi-factor evaluation method based on fuzzy mathematics was proposed.The benchmarking method was used to allocate the weight of the machine performance factor which was difficult to quantify,and then the quantitative information was used to fuzzy the influencing factors,which could reduce the subjective influence.The fuzzy evaluation factor of the whole machine performance of the experimental prototype was 0.9499,which was higher than that of the middle-level model and was closest to that of the high-level model,proving that it was superior in operability,economy and reliability.Then,the experimental verification of the evaluation results showed that the vibration and noise performance of the experimental prototype was good,and the single action of the working device and the rotation were equivalent to that of the high-level model.While in the compound action,although the time of boom lifting and rotation increased by 6.5%,the percentage of the hydraulic cylinder stroke only decreased by 3.6,the percentage of bucket lifting height only decreased by 3.9,and the loading height was equivalent compared to that of the high-level model.The experimental results were consistent with the score of the operator,and the accuracy of the fuzzy evaluation method was verified.