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厢式半挂车简化模型参数辨识研究

, PP. 112-120

Keywords: 汽车工程,厢式半挂车,遗传算法,参数辨识,简化动力学模型

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Abstract:

?为了准确表征厢式半挂车动态特性,在建立三自由度、五自由度简化模型,并提出符合厢式半挂车实际载荷分布情况的假设基础上,使用TruckSim数据并运用双模型与遗传算法相结合的方法对简化模型关键参数进行辨识。根据货物质量和侧向加速度设定了辨识工况点,并完成所设定的工况点参数辨识,利用辨识后的关键参数形成了以货物质量和侧向加速度为自变量的关键参数脉谱图,并利用辨识出的关键参数脉谱图和五自由度简化模型进行动态工况仿真验证。结果表明:利用双模型与遗传算法相结合的方法辨识出的关键参数和其形成的脉谱图,能够满足简化模型动态表征厢式半挂车实际状态的要求,可为车辆状态估计和稳定性控制提供基础。

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