基于Simulink的大客车操纵稳定性“灰箱”模型

Coach Handling and Stability"Gray Box"Model Based on Simulink Parameter Estimation Tool

结合汽车理论和辨识理论建立大客车"灰箱"模型大大提高模型反映实际的能力。利用Simulink Parameter Estimation工具,对轮胎模型中参数的进行了辨识,确立了轮胎的二阶二项式回归模型,从而实现了大客车"灰箱"模型的构建。模型的可靠性在Simulink下通过对模型最终输出和中间状态的观测值和仿真值进行对比进行了验证,结果表明该模型可以对大客车的操纵稳定性进行较为准确的描述。

The coach ＂gray box＂ model could improve strongly its ability in expressing coach handling and stability..4 coach ＂gray model＇＂ was constructed based on vehicle theory and identification theory. In the model parameters about tires model were identified using Simulink Parameter Estimation tool and the binary quadratic polynomials correlated with tires stiffness were confirmed based on these parameters. Finally, the model＇s validity was tested by comparing measured value with simulated result of finally outputs and middle states under Simulink environment. The results show the model may describe coach handling and stability accurately.