基于Simulink的路面不平度时域模型仿真研究．

时域路面不平度建模对轮椅振动分析具有重要意义。对GB／T7031-2005中提出的路面功率谱密度表达式及等分方法．应用线性滤波法与谐波叠加法分别重构路面不平度模型，使用周期图谱估计法验证仿真结果。结果表明线性滤波法与谐波叠加法均能在谱一致准则下生成不同路面与车速下的时域路面不平度，为人与轮椅系统分析研究提供了数据支持。

Simulation Study of Time--domain Road Roughness Modeling Based on Simulink

The road roughness model is crucial to wheelchair vibration analysis. For the expression of the road power spectrum and classification proposed in GB/T 7031-2005,the road roughness was simulated through Partial Wave Adding Model and Linear Filtering Method,the simulation results were verified by the periodogram model of the modern speetruax estimation.The result showed that either mothed of linear filtering or partial wave adding model could generate the time-domain road roughness in terms of different road conditions and vehicle speeds.The experimental results reveal that the research could provide date support to the person and wheelchair systems analysis studies.