论文部分内容阅读
为了提高机场跑道摩擦因数测试车的测量精度,对机场跑道路面不平度和摩擦因数测试车进行了建模和仿真。利用路面功率谱密度和离散Fourier逆变换法建立了机场跑道路面不平度模型作为测量系统的输入激励,采用阻抗框图建模法,建立了机场跑道摩擦因数测试车悬挂系统和测试系统模型,并在该模型的基础上进行了系统仿真,并将仿真结果与现有机场跑道摩擦因数测试车实测数据进行对比。对比结果表明:通过对机场跑道摩擦因数测试车进行综合阻抗框图建模,可将最大相对测量误差从15.7%降低到8.6%,因此,建立的数学模型测量精度高。
In order to improve the measurement accuracy of the friction coefficient test vehicle at the airport runway, the runway roughness and friction coefficient test vehicle are modeled and simulated. The road surface roughness model of airport runway was established as the input excitation of the measurement system by using the road power spectral density and discrete Fourier inverse transform method. The impedance diagram modeling method was used to establish the model of the suspension system and the test system of the friction coefficient test vehicle for the airport runway. Based on the model, the system simulation is carried out and the simulation results are compared with the existing test data of the friction coefficient of the runway in the airport. The comparison results show that the maximum error of relative measurement can be reduced from 15.7% to 8.6% by modeling the comprehensive impedance diagram of the runway friction coefficient test vehicle. Therefore, the established mathematical model has high measurement accuracy.