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In order to reveal the mechanics of composite regeneration by coupling cerium-based additive and microwave for a diesel particulate filter, a composite regeneration model by coupling cerium-based additive and microwave for a diesel particulate filter was established based on field synergy theory. Performance evaluation on field synergy and composite regeneration of the diesel particulate filter was conducted by using the vortex crushing combustion and field synergy mathematical models. The results show that the peak temperature of the particulate filter body reaches 1180-1190 K when the regeneration time is 175 s, and there are optimal coordination degree between the velocity vector and temperature gradient of the filter body and the maximum ratio0.56-0.60 of the best burning regeneration region is obtained. Accordingly, the largest regeneration combustion rate inside the particulate filter body and the highest regeneration efficiency at the moment are achieved. 相似文献
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通过对发动机辅助制动工作过程进行理论分析,建立了发动机辅助制动计算模型,根据辅助制动相关参数(包括排气门开度、发动机转速和排气背压等),对发动机辅助制动进行了单因素和多因素条件下的仿真研究及试验验证。结果表明:随着发动机转速的升高,缸内压力增大,且压力峰值更靠近上止点;制动扭矩随转速的升高而增大,减压制动时制动扭矩最大,发动机制动时制动扭矩最小;发动机转速一定时,泄漏制动和减压制动分别有一对应的最佳排气门开度值,并且转速越高,排气门开度最佳值越大,排气背压越高,制动扭矩越大。 相似文献
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芦苇笋采收机在工作时需人工实时操纵输出电压来适应负载力矩的变化,为提高采收效率和降低操作难度,提出了一种基于遗传算法的模糊控制PID算法以实现芦苇笋采摘装置同步带转速的智能控制。通过分析芦苇笋采摘装置的工作原理,建立了控制电压和负载力矩输入和液压马达输出轴角速度输出的状态方程数学模型;利用MATLAB/Simulink软件设计通过遗传算法优化隶属度函数和模糊规则的Mamdani模糊PID控制器,对液压马达的状态方程进行仿真。结果表明:采用遗传算法优化的模糊PID控制器相较于普通PID控制器和模糊控制器能够对输入信号更迅速地做出响应,且上升过程平稳无超调,有较强的抗干扰能力,鲁棒性较强,满足对芦苇笋采收机工作过程的简化操作和提高效率的控制要求。 相似文献
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