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矿用汽车动力源功率匹配控制策略

, PP. 82-91

Keywords: 矿用汽车,动力源优化,功率匹配,交流传动,分层控制,车辆负荷度,燃油经济性

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Abstract:

针对矿用汽车发动机工作点分布于燃油低效区的问题,提出了基于功率匹配的交流传动控制策略,使得传动系统能够根据车辆工况的变化相应改变发动机输出功率。确定了电传动系统功率区,引入了车辆负荷度评价车辆所处工况的负荷程度,设计了3层结构的控制策略,上层算法中使用滑动平均滤波算法对轮边电机转速进行预处理,计算车辆负荷度;中层算法利用三维模糊控制器,根据车辆负荷度及发动机转速计算了参考功率;下层算法中驱动系统追踪给定的参考功率,实现了矿用汽车的功率匹配。为验证功率匹配控制策略的控制效果,搭建了电传动试验平台进行验证。验证结果表明控制策略能够快速识别矿用汽车启动、爬坡、突遇负载、下坡等常用工况的负载变化,并计算适合当前负载的驱动功率,保障了矿用汽车在恶劣工况下的动力性;稳态试验考察了控制策略下矿用汽车的节油效果,发动机工作点分布在最佳燃油经济性曲线附近,负载为40kW时,功率匹配控制策略的燃油消耗量比满足最大功率需要策略减少10.8%,负载为80kW时,功率匹配控制策略的燃油消耗量比满足最大功率需要策略减少4.8%,验证了功率匹配策略的有效性与可行性。

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