工程机械液压泵和马达模型的非线性改进

Nonlinear Improvement on Hydraulic Pump and Motor Models for Construction Machinery

摘要:

对传统键合图模型部分元件进行了非线性化改进,并建立了参数优化算法来根据样本的效率实验数据确定模型参数.以一种马达产品样本对象为例,改进后模型得出的工况效率分布图与实验图线对比结果明显优于传统模型;与试验数据对比误差分析证明,传统模型误差比例均值为3.55%,方差为0.005 298;改进后模型误差比例均值为1.18%,方差为0.000 487 5;改进后模型更适用于工况复杂设备的建模描述.

Abstract:

Improved nonlinear bond graph models and the parameter optimization algorithms are established.With these optimization algorithms,model parameters can be determined based on the experimental efficiency data of samples.Taking a motor product sample for example,the distribution chart of operating conditions efficiency of the improved model is much closer to the experimental results than that of the traditional model.Compared to sample experimental results,the mean value of percentage error for traditional model is 3.55% and for improved model is 1.18%,and the variance value of the improved model is much smaller than that of the traditional model.The error analysis proves that the improved model is much more suitable for description of device modeling in complex operating conditions.