盾构机土压平衡系统的ARMA模型及其参数估计

发布时间：2018-09-11 16:52

【摘要】：为了表征盾构机土仓压力平衡系统的时滞特性和提高模型的预测精度,建立了该系统的自回归滑动平均(ARMA)模型,并提出了基于优化算法的ARMA模型参数估计方法。实验结果表明,与经典的线性机理模型相对比,新模型显著提高了土仓压力的拟合和预测精度。ARMA模型预测土仓压力的最大相对误差从机理模型的41%降低到9%。结合实验数据,分析了该系统动态响应的时滞特性,分析表明,螺旋输送机转速对下一时刻土仓压力影响的时滞特性更加明显。
[Abstract]:In order to characterize the time-delay characteristics of the earth silo pressure balance system of shield machine and improve the prediction accuracy of the model, the autoregressive moving average (ARMA) model is established, and the parameter estimation method of the ARMA model based on the optimization algorithm is proposed. The experimental results show that compared with the classical linear mechanism model, the new model can significantly improve the fitting and prediction accuracy of soil silo pressure. The maximum relative error of ARMA model for predicting soil silo pressure is reduced from 41% to 9% of the mechanism model. Based on the experimental data, the time-delay characteristics of the dynamic response of the system are analyzed. The analysis shows that the time-delay characteristic of the influence of the rotating speed of the screw conveyor on the pressure of the earth bunker at the next moment is more obvious.
【作者单位】：大连理工大学工业装备结构分析国家重点实验室;大连理工大学机械工程学院;大连海洋大学机械与动力工程学院;
【基金】：国家重点基础研究发展计划(973)资助项目(2013CB035402) 国家自然科学基金重点资助项目(51105048) 工业装备结构分析国家重点实验室开放基金资助项目(S14206)
【分类号】：U455.39

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