In order to improve the detection accuracy of Doppler asymmetric spatial heterodyne(DASH)interferometer in harsh temperatures,an opto-mechanical-thermal integration analysis is carried out.Firstly,the correlation betw...In order to improve the detection accuracy of Doppler asymmetric spatial heterodyne(DASH)interferometer in harsh temperatures,an opto-mechanical-thermal integration analysis is carried out.Firstly,the correlation between the interference phase and temperature is established according to the working principle and the phase algorithm of the interferometer.Secondly,the optical mechanical thermal analysis model and thermal deformation data acquisition model are designed.The deformation data of the interference module and the imaging optical system at different temperatures are given by temperature load simulation analysis,and the phase error caused by thermal deformation is obtained by fitting.Finally,based on the wind speed error caused by thermal deformation of each component,a reasonable temperature control scheme is proposed.The results show that the interference module occupies the main cause,the temperature must be controlled within(20±0.05)℃,and the temperature control should be carried out for the temperature sensitive parts,and the wind speed error caused by the part is 3.8 m/s.The thermal drift between the magnification of the imaging optical system and the thermal drift of the relative position between the imaging optical system and the detector should occupy the secondary cause,which should be controlled within(20±2)℃,and the wind speed error caused by the part is 3.05 m/s.In summary,the wind measurement error caused by interference module,imaging optical system,and the relative position between the imaging optical system and the detector can be controlled within 6.85 m/s.The analysis and temperature control schemes presented in this paper can provide theoretical basis for DASH interferometer engineering applications.展开更多
基于城市暴雨处理及分析集成模型系统(System for Urban Stormwater Treatment and Analysis Integration,SUSTAIN)方法,评估最佳管理措施(Best Management Practices,BMP)不同方案组合对暴雨径流控制效果,获得最有经济效益的BMP方案组...基于城市暴雨处理及分析集成模型系统(System for Urban Stormwater Treatment and Analysis Integration,SUSTAIN)方法,评估最佳管理措施(Best Management Practices,BMP)不同方案组合对暴雨径流控制效果,获得最有经济效益的BMP方案组合。选择延庆县康安小区为研究案例,通过BMP适宜性以及当地实际情况进行分析,在社区规划设置了绿色屋顶,透水铺装,生物滞留池,植草沟BMP方案。规划后利用SUSTAIN中的土地模块、BMP模拟模块以及传输模块中的算法进行计算,得出开发前、后以及开发后BMP规划3种情形的年径流量以及年污染物输出量。城市开发后,相对于开发前年径流量以及污染物输出量增长数倍。而经过BMP规划后,通过模拟,相对于开发后的情形,对径流量、TSS、COD、TN、TP削减率分别为43%、31%、44%、48%、39%。利用SUSTAIN优化模块中的NSGA-II算法对开发后规划BMP情形优化,以径流量以及污染物削减效率为优化目标,得出径流量以及污染物削减效率的成本效率曲线。选择成本效率曲线的几个优化方案进行说明,经过优化后相对于开发后情形径流量,TSS,COD,TN,TP削减效率分别提高到61%,46%,48%,65%,58%,且成本都有所下降。展开更多
文摘In order to improve the detection accuracy of Doppler asymmetric spatial heterodyne(DASH)interferometer in harsh temperatures,an opto-mechanical-thermal integration analysis is carried out.Firstly,the correlation between the interference phase and temperature is established according to the working principle and the phase algorithm of the interferometer.Secondly,the optical mechanical thermal analysis model and thermal deformation data acquisition model are designed.The deformation data of the interference module and the imaging optical system at different temperatures are given by temperature load simulation analysis,and the phase error caused by thermal deformation is obtained by fitting.Finally,based on the wind speed error caused by thermal deformation of each component,a reasonable temperature control scheme is proposed.The results show that the interference module occupies the main cause,the temperature must be controlled within(20±0.05)℃,and the temperature control should be carried out for the temperature sensitive parts,and the wind speed error caused by the part is 3.8 m/s.The thermal drift between the magnification of the imaging optical system and the thermal drift of the relative position between the imaging optical system and the detector should occupy the secondary cause,which should be controlled within(20±2)℃,and the wind speed error caused by the part is 3.05 m/s.In summary,the wind measurement error caused by interference module,imaging optical system,and the relative position between the imaging optical system and the detector can be controlled within 6.85 m/s.The analysis and temperature control schemes presented in this paper can provide theoretical basis for DASH interferometer engineering applications.
文摘基于城市暴雨处理及分析集成模型系统(System for Urban Stormwater Treatment and Analysis Integration,SUSTAIN)方法,评估最佳管理措施(Best Management Practices,BMP)不同方案组合对暴雨径流控制效果,获得最有经济效益的BMP方案组合。选择延庆县康安小区为研究案例,通过BMP适宜性以及当地实际情况进行分析,在社区规划设置了绿色屋顶,透水铺装,生物滞留池,植草沟BMP方案。规划后利用SUSTAIN中的土地模块、BMP模拟模块以及传输模块中的算法进行计算,得出开发前、后以及开发后BMP规划3种情形的年径流量以及年污染物输出量。城市开发后,相对于开发前年径流量以及污染物输出量增长数倍。而经过BMP规划后,通过模拟,相对于开发后的情形,对径流量、TSS、COD、TN、TP削减率分别为43%、31%、44%、48%、39%。利用SUSTAIN优化模块中的NSGA-II算法对开发后规划BMP情形优化,以径流量以及污染物削减效率为优化目标,得出径流量以及污染物削减效率的成本效率曲线。选择成本效率曲线的几个优化方案进行说明,经过优化后相对于开发后情形径流量,TSS,COD,TN,TP削减效率分别提高到61%,46%,48%,65%,58%,且成本都有所下降。
