汽车悬架性能测试方法及测试系统研究

Study on Testing Method and Testing System of Vehicle Suspensions Performance

在建立检测车辆悬架振动动力学模型和运动方程的基础上,分析并确定了悬架性能的评价指标,提出了悬架性能的检测新方法,采用虚拟仪器技术开发了汽车悬架性能测试系统。该测试系统采用PC-DAQ方案,在原有激振式悬架性能试验台上,增装必要的传感器,配以PC机平台和虚拟仪器软件,构建了可以测得悬架的吸收效率、振动频率、相位差及相应的振动波形的性能测试系统,为悬架性能的综合评价及故障诊断提供了依据。通过实车测试,所建理论模型正确、可行,测试系统准确、可靠。

Based on automobile suspension vibration mechanical model and kinematic equation, evaluation indexes for the suspension performance are analyzed and ideutified and improved suspension testing method is proposed develop the automobile suspension performance test system with virtual instrument technology combined with PC-DAQ scheme. On the traditional automobile suspension prompting test table, some necessary sensors are added as well as personal computer and the virtual software to make the vibration test system capable of measuring the vibration absorption efficiency, the vibration efficiency, the swing and the vibration wave shape and so on. It also provides the gist integrated evaluation and diagnosis of the suspensions system. Practical car test proved that the theoretical model is credible and feasible and the testing system is accurate and reliable.