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工程机械发动机动态加载试验装置

, PP. 118-126

Keywords: 机械工程,发动机,加载试验,动态特性,二次调节,预测函数

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Abstract:

?为了获得动态性能好、控制精度高的工程机械发动机动态加载试验装置,以测试发动机在变负荷工况下的输出特性,构建了基于恒压网络二次调节系统的模型和以预测函数(PFC)为控制算法的新型静液传动加载装置,对其数学模型进行仿真分析,并在所构建的恒压二次调节加载试验台上进行试验研究。研究结果表明:加载频率在3Hz内时,所构建的试验装置可完全满足工程机械发动机的工作要求;转矩幅值控制精度可达96%,响应时间小于0.08s;与传统的测功机相比,该试验装置具有较好的动态性能和加载精度,有利于工程机械发动机动态性能的进一步研究。

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