Affected by COVID-19,disinfection and purification in public space,such as ordinary school,had aroused wide public concern.This study presents an improved structure of nowadays medical used UV air purifier and discuss...Affected by COVID-19,disinfection and purification in public space,such as ordinary school,had aroused wide public concern.This study presents an improved structure of nowadays medical used UV air purifier and discusses about its efficiency optimization,by utilizing following processes:Firstly,establishing the inner structure of the machine on computer and setting up the boundary conditions.Secondly,employing CFD(Computational Fluid Dynamics)to proceed the simulation of air swirl and the time used,and analyzing the relationship between different parameters and time.Finally,combining optimized parameters to obtain the best time used.The optimized structure efficaciously reduces the cost of machine,making utilization in the classroom become possible.展开更多
获得大工作空间是并联机构设计中的一个重要目标,利用3种优化算法对并联机构工作空间体积进行优化,以6自由度机构6-RSS为例,建立优化模型,分析比较优化算法的性能。考察的性能指标主要有优化效果、数值稳定性、时间效率。涉及到的优化...获得大工作空间是并联机构设计中的一个重要目标,利用3种优化算法对并联机构工作空间体积进行优化,以6自由度机构6-RSS为例,建立优化模型,分析比较优化算法的性能。考察的性能指标主要有优化效果、数值稳定性、时间效率。涉及到的优化算法包括多岛遗传算法、广义简约梯度法、序列二次规划法,后两种算法在应用时与试验设计(Design of experiment,DOE)方法进行集成。试验分析表明,DOE结合局部优化算法的改进型优化方法有明显优势,优化后6-RSS并联机构的工作空间体积增加为原来的2.59倍,优化时间仅为多岛遗传算法的1/5,优化结果稳定。展开更多
文摘Affected by COVID-19,disinfection and purification in public space,such as ordinary school,had aroused wide public concern.This study presents an improved structure of nowadays medical used UV air purifier and discusses about its efficiency optimization,by utilizing following processes:Firstly,establishing the inner structure of the machine on computer and setting up the boundary conditions.Secondly,employing CFD(Computational Fluid Dynamics)to proceed the simulation of air swirl and the time used,and analyzing the relationship between different parameters and time.Finally,combining optimized parameters to obtain the best time used.The optimized structure efficaciously reduces the cost of machine,making utilization in the classroom become possible.
文摘获得大工作空间是并联机构设计中的一个重要目标,利用3种优化算法对并联机构工作空间体积进行优化,以6自由度机构6-RSS为例,建立优化模型,分析比较优化算法的性能。考察的性能指标主要有优化效果、数值稳定性、时间效率。涉及到的优化算法包括多岛遗传算法、广义简约梯度法、序列二次规划法,后两种算法在应用时与试验设计(Design of experiment,DOE)方法进行集成。试验分析表明,DOE结合局部优化算法的改进型优化方法有明显优势,优化后6-RSS并联机构的工作空间体积增加为原来的2.59倍,优化时间仅为多岛遗传算法的1/5,优化结果稳定。
