A multi Fiber Spectroscope at Kiso Observatory is under consideration as our next instrument. In this paper we report an overview of our instrument and a scientific target of survey project. We are going to attach mul...A multi Fiber Spectroscope at Kiso Observatory is under consideration as our next instrument. In this paper we report an overview of our instrument and a scientific target of survey project. We are going to attach multi fiber system at the prime focus of Kiso 150m Schmidt telescope. This telescope has some advantage for our project. First, the effciency in survey for the objects, which number density is 0 1 to 10/degree 2, is higher than other multi object system due to the wide field of view (6 °×6 °). Second, an optics of telescope is well matched to fiber numerical aperture (NA) at an input end of fiber. Moreover, taking a focal ratio degradation (FRD) and scrambling property into account, since the light from object does not move at the entrance slit of spectroscope, we could get spectroscopic data stably with this system. We select a fiber with 100μm core which corresponding to 6 arcsec on focal plane, that is matched with a typical seeing (3 arcsec) at Kiso Observatory and set 150 fibers to one field. For efficient observations, it is necessary to arrange fibers accurately within an accuracy of ±25μm on the curved focal plane during a typical exposure time (1 hour). Therefore we examine a particular positioner specialized for curved surface. We also develop a spectroscope that is suited for a fast focal ratio and proceed with making its design. One of our main key projects with this system is a non biased survey for solar neighbour stars. We are now establishing a new metallicity determination method that easily and reliably measures a metallicity from low dispersion spectra. (see Itoh it et al. 1998) As we consider our main target as Galactic objects and low resolution (R is around 1000), we could observe a star with 17 mag at V band (1 hour exposure).展开更多
We have developed 32-fiber and 60-fiber super high density multi fiber connector. This 32-fiber connector can be applicable for single-mode fiber and 60-fiber connector for multi-mode fiber. We have also established P...We have developed 32-fiber and 60-fiber super high density multi fiber connector. This 32-fiber connector can be applicable for single-mode fiber and 60-fiber connector for multi-mode fiber. We have also established PC (physical contact) connection technology by optimizing polishing condition and clamping force.展开更多
玄武岩纤维增强复合材料(basalt fiber-reinforced polymer,BFRP)具有优异的力学性能和可熔融再生特性,在汽车轻量化领域的应用前景广阔。针对某车型的铝制防撞装置,开展BFRP/铝混合防撞装置的多目标优化设计。首先,对BFRP层合板开展力...玄武岩纤维增强复合材料(basalt fiber-reinforced polymer,BFRP)具有优异的力学性能和可熔融再生特性,在汽车轻量化领域的应用前景广阔。针对某车型的铝制防撞装置,开展BFRP/铝混合防撞装置的多目标优化设计。首先,对BFRP层合板开展力学性能测试,并利用HyperMesh软件建立防撞装置有限元模型;其次,采用拉丁超立方抽样生成代理模型的训练样本,结合敏感度分析识别关键设计参数,并通过基于加权欧式距离的空间填充采样法来提升代理模型对响应指标的预测精度;最后,以防撞装置峰值载荷、总质量及横梁最大位移最小为优化目标,运用MOPSO(multi-objective particle swarm optimization,多目标粒子群优化)算法求解Pareto前沿,并基于熵权-TOPSIS(technique for order preference by similarity to an ideal solution,逼近理想解排序法)确定最优设计参数组合。结果显示:优化后防撞装置的峰值载荷降低了36.15%,总质量减小了12.23%,显著提升了耐撞性能并实现了轻量化目标。所提出的方法可为BFRP/铝混合防撞装置的轻量化设计提供一套系统性的解决方案。展开更多
文摘A multi Fiber Spectroscope at Kiso Observatory is under consideration as our next instrument. In this paper we report an overview of our instrument and a scientific target of survey project. We are going to attach multi fiber system at the prime focus of Kiso 150m Schmidt telescope. This telescope has some advantage for our project. First, the effciency in survey for the objects, which number density is 0 1 to 10/degree 2, is higher than other multi object system due to the wide field of view (6 °×6 °). Second, an optics of telescope is well matched to fiber numerical aperture (NA) at an input end of fiber. Moreover, taking a focal ratio degradation (FRD) and scrambling property into account, since the light from object does not move at the entrance slit of spectroscope, we could get spectroscopic data stably with this system. We select a fiber with 100μm core which corresponding to 6 arcsec on focal plane, that is matched with a typical seeing (3 arcsec) at Kiso Observatory and set 150 fibers to one field. For efficient observations, it is necessary to arrange fibers accurately within an accuracy of ±25μm on the curved focal plane during a typical exposure time (1 hour). Therefore we examine a particular positioner specialized for curved surface. We also develop a spectroscope that is suited for a fast focal ratio and proceed with making its design. One of our main key projects with this system is a non biased survey for solar neighbour stars. We are now establishing a new metallicity determination method that easily and reliably measures a metallicity from low dispersion spectra. (see Itoh it et al. 1998) As we consider our main target as Galactic objects and low resolution (R is around 1000), we could observe a star with 17 mag at V band (1 hour exposure).
文摘We have developed 32-fiber and 60-fiber super high density multi fiber connector. This 32-fiber connector can be applicable for single-mode fiber and 60-fiber connector for multi-mode fiber. We have also established PC (physical contact) connection technology by optimizing polishing condition and clamping force.
文摘玄武岩纤维增强复合材料(basalt fiber-reinforced polymer,BFRP)具有优异的力学性能和可熔融再生特性,在汽车轻量化领域的应用前景广阔。针对某车型的铝制防撞装置,开展BFRP/铝混合防撞装置的多目标优化设计。首先,对BFRP层合板开展力学性能测试,并利用HyperMesh软件建立防撞装置有限元模型;其次,采用拉丁超立方抽样生成代理模型的训练样本,结合敏感度分析识别关键设计参数,并通过基于加权欧式距离的空间填充采样法来提升代理模型对响应指标的预测精度;最后,以防撞装置峰值载荷、总质量及横梁最大位移最小为优化目标,运用MOPSO(multi-objective particle swarm optimization,多目标粒子群优化)算法求解Pareto前沿,并基于熵权-TOPSIS(technique for order preference by similarity to an ideal solution,逼近理想解排序法)确定最优设计参数组合。结果显示:优化后防撞装置的峰值载荷降低了36.15%,总质量减小了12.23%,显著提升了耐撞性能并实现了轻量化目标。所提出的方法可为BFRP/铝混合防撞装置的轻量化设计提供一套系统性的解决方案。
