The impact of microwave sweeper power fluctuation in the BOTDA system has been theoretically analyzed and experimentally tested. And a novel method comparing real-time acquisition of probe wave power with a new algori...The impact of microwave sweeper power fluctuation in the BOTDA system has been theoretically analyzed and experimentally tested. And a novel method comparing real-time acquisition of probe wave power with a new algorithm to realize probe wave power normalization for eliminating this impact was proposed. The principle of the proposed method was described theoretically. And the contrast test between our new method and conventional one was carried out. The experiment results indicated that the temperature accuracy was effectively improved from ＋5 C to 2 C.展开更多
Recently, the local government of Yibin Sichuan Province, sent 70 street sweepers to Singapore to learn from the country’s experience in keeping the city cleaner and more beautiful. This is the second time that the g...Recently, the local government of Yibin Sichuan Province, sent 70 street sweepers to Singapore to learn from the country’s experience in keeping the city cleaner and more beautiful. This is the second time that the government of Yibin sponsored street sweepers for an overseas study tou after tours to Hong Kong and Macao展开更多
针对电动清扫车传统恒定功率作业模式的局限性,以及模糊控制中存在的主观性过强、缺乏理论支撑等问题,提出了一种融合路面清洁感知与模糊优化的节能作业策略。首先,采用YOLOv8-seg模型分割并量化路面垃圾,结合垃圾种类和覆盖面积计算出...针对电动清扫车传统恒定功率作业模式的局限性,以及模糊控制中存在的主观性过强、缺乏理论支撑等问题,提出了一种融合路面清洁感知与模糊优化的节能作业策略。首先,采用YOLOv8-seg模型分割并量化路面垃圾,结合垃圾种类和覆盖面积计算出路面清洁指数;其次,构建以路面清洁指数和车速为输入,以作业电机转速和转矩为输出的模糊控制器,并选取18个隶属度函数参数,以减少作业能耗为目标,采用灰狼优化算法(grey wolf optimizer,GWO)进行优化;最后,通过MATLAB/Simulink在制定的仿真工况下验证提出策略的有效性。结果表明:所提策略有效减少了电动清扫车的功率消耗,作业能耗相较于优化前降低了9.85%。同时,优化后的电池SOC变化趋势更加平缓。研究结果为电动清扫车的智能化、节能化发展提供了新的技术路径。展开更多
针对大吨位洗扫车副车架设计过程中存在的设计周期长、重复性设计多以及无法快速改型等问题,提出了基于NX的洗扫车副车架的快速设计的方法。首先,运用自顶向下的设计方法结合NX/WAVE技术对副车架进行控制结构框架设计;其次,对主要零部...针对大吨位洗扫车副车架设计过程中存在的设计周期长、重复性设计多以及无法快速改型等问题,提出了基于NX的洗扫车副车架的快速设计的方法。首先,运用自顶向下的设计方法结合NX/WAVE技术对副车架进行控制结构框架设计;其次,对主要零部件进行参数化建模,运用Menuscript技术定制菜单对话框;最后,通过Visual Studio 2015编译链接生成动态链接库文件,实现参数化零部件与相应菜单之间的映射。在此基础上开发洗扫车副车架快速设计系统。运用该系统对副车架进行设计,不仅能够形成严谨的产品结构和设计流程,而且还极大提高建模效率,缩短副车架的开发周期并减少开发成本。展开更多
文摘The impact of microwave sweeper power fluctuation in the BOTDA system has been theoretically analyzed and experimentally tested. And a novel method comparing real-time acquisition of probe wave power with a new algorithm to realize probe wave power normalization for eliminating this impact was proposed. The principle of the proposed method was described theoretically. And the contrast test between our new method and conventional one was carried out. The experiment results indicated that the temperature accuracy was effectively improved from ＋5 C to 2 C.
文摘Recently, the local government of Yibin Sichuan Province, sent 70 street sweepers to Singapore to learn from the country’s experience in keeping the city cleaner and more beautiful. This is the second time that the government of Yibin sponsored street sweepers for an overseas study tou after tours to Hong Kong and Macao
文摘针对电动清扫车传统恒定功率作业模式的局限性,以及模糊控制中存在的主观性过强、缺乏理论支撑等问题,提出了一种融合路面清洁感知与模糊优化的节能作业策略。首先,采用YOLOv8-seg模型分割并量化路面垃圾,结合垃圾种类和覆盖面积计算出路面清洁指数;其次,构建以路面清洁指数和车速为输入,以作业电机转速和转矩为输出的模糊控制器,并选取18个隶属度函数参数,以减少作业能耗为目标,采用灰狼优化算法(grey wolf optimizer,GWO)进行优化;最后,通过MATLAB/Simulink在制定的仿真工况下验证提出策略的有效性。结果表明:所提策略有效减少了电动清扫车的功率消耗,作业能耗相较于优化前降低了9.85%。同时,优化后的电池SOC变化趋势更加平缓。研究结果为电动清扫车的智能化、节能化发展提供了新的技术路径。
文摘针对大吨位洗扫车副车架设计过程中存在的设计周期长、重复性设计多以及无法快速改型等问题,提出了基于NX的洗扫车副车架的快速设计的方法。首先,运用自顶向下的设计方法结合NX/WAVE技术对副车架进行控制结构框架设计;其次,对主要零部件进行参数化建模,运用Menuscript技术定制菜单对话框;最后,通过Visual Studio 2015编译链接生成动态链接库文件,实现参数化零部件与相应菜单之间的映射。在此基础上开发洗扫车副车架快速设计系统。运用该系统对副车架进行设计,不仅能够形成严谨的产品结构和设计流程,而且还极大提高建模效率,缩短副车架的开发周期并减少开发成本。
