摘要
在分析路面空间频率功率谱密度、时间频率功率谱密度与方差之间关系的基础上,建立了路面随机信号生成模型,在不同车速情况下进行了仿真,生成了B和C级随机路面时间激励信号。利用功率谱密度和方差分析,对所建立模型的仿真结果与路面分级标准进行比较,证明所建模型产生的随机信号功率谱和方差值与国家规定的路面等级标准一致,结果准确,可以为车辆控制研究提供可靠的激励信号。
In the time domain analysis of vehicle ride comfort,the veracity of the input excitation signals is directly related to the simulation result.The random road model was constructed by Matlab/Simulink based on the study of the relation of stochastic road space and time frequency power spectral density（PSD） and PSD and root-mean-square（RMS）.The stochastic excitation signals were produced,and the vertical displacement of the B and C level uneven road was built by simulation with different vehicle velocities.By PSD and RMS analysis of vertical displacement of simulation result and national standards,the correctness of model was confirmed.That can offer reliable excitation signals for control research of vehicle.It proves that the idea and methods of modeling is unique and practical.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2010年第3期11-15,共5页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金资助项目(50575064)
安徽省"十一五"科技攻关项目(07010202055)
安徽省教育厅自然科学科研项目(KJ2007B127)
安徽科技学院自然科学科研项目(ZRC2007125)
关键词
路面不平度
随机激励
功率谱密度
时域模型
仿真
Roughness of road surface
Random excitation
Power spectral density
Time domain model
Simulation
