搜索结果: 1-15 共查到“仪器科学与技术 TMT”相关记录16条 . 查询时间(0.129 秒)
TMT三镜动力学模型辨识与标校
TMT 三镜 动力学模型 传递函数 随机减量
2016/8/4
为了更好地对于30 m望远镜三镜(TMT M3)的动力学进行度量与检测,基于加速度信号建立了系统模态信息的计算与评价方法。首先,分析了如何利用加速度计对于TMT三镜系统进行检测。之后,利用系统对于未知载荷的响应,基于随机减量法获得了系统的自由响应;之后,根据多项式拟合的方法,对于获得的传递函数进行处理。根据之前所提出的方法,对于4 m级系统,获得了其系统前两阶模态为88 Hz以及107 Hz,并获...
Thermal Analysis of the TMT Telescope Structure
telescope structure thermal analysis environment data temperature distributions
2015/5/13
Thermal performances of the Thirty Meter Telescope (TMT) structure were evaluated by finite element thermal models.
The thermal models consist of the telescope optical assembly systems, instruments,...
Thermal modeling environment for TMT
Extremely Large Telescopes Thermal Modeling Computational Fluid Dynamics
2015/5/13
In a previous study we had presented a summary of the TMT Aero-Thermal modeling effort to support thermal seeing
and dynamic loading estimates. In this paper a summary of the current status of Compu...
Primary mirror dynamic disturbance models for TMT: Vibration and wind
Extremely Large Telescopes Wind Vibration Control Systems
2015/5/13
The principal dynamic disturbances acting on a telescope segmented primary mirror are unsteady wind pressure
(turbulence) and narrowband vibration from rotating equipment. Understanding these disturb...
Thermal Performance Prediction of the TMT Telescope Structure
telescope structure thermal analysis temperature distributions thermo-elastic analysis
2015/5/12
Thermal analysis for the Thirty Meter Telescope (TMT) structure was performed using finite element analysis in
ANSYS and I-DEAS. In the thermal analysis, the telescope structural parts with simplifi...
Dynamic disturbance sources affecting the optical performance of the Thirty Meter Telescope (TMT) include
unsteady wind forces inside the observatory enclosure acting directly on the telescope ...
MONTE CARLO SIMULATION FRAMEWORK FOR TMT
Extremely Large Telescopes Performance Modeling Statistical Modeling
2015/5/12
This presentation describes a strategy for assessing the performance of the Thirty Meter Telescope (TMT). A Monte
Carlo Simulation Framework has been developed to combine optical modeling with Compu...
Performance Prediction of the TMT Secondary Mirror Support System
Secondary mirror mirror performance mirror support optimization
2015/5/12
The optical systems of TMT have stringent requirements to achieve scientific goals. The M2M support system was
optimized to meet the requirements defined in “TMT Image Size and Wavefront Error Budge...
Thermal Performance Prediction of the TMT Optics
thermal models temperature distributions thermo-elastic analysis
2015/5/12
Thermal analysis for the Thirty Meter Telescope (TMT) optics (the primary mirror segment, the secondary mirror, and
the tertiary mirror) was performed using finite element analysis in ANSYS and I-DE...
ADVANCES IN AEROTHERMAL MODELING FOR TMT
Extremely Large Telescopes Thermal and Aerodynamic Modeling Computational Fluid Dynamics
2015/5/12
The performance requirements of the Thirty Meter Telescope (TMT) dictate, among others, a thorough understanding of
the flow field inside and around the observatory. Mirror and dome seeing as well a...
TMT Early Light Adaptive Optics.
Chinese Interests and Capabilities: Engineering Contributions to TMT Instrumentations
Interests Capabilities
2015/5/12
Chinese Interests and Capabilities: Engineering Contributions to TMT Instrumentations.
The TMT Instrumentation Program.
为了更好地对于TMT三镜镜面jitter进行评价,基于镜面方向的加速度信号,通过传递函数以及功率谱的方法,获得了镜面jitter的频域分布与数值特征。首先,对于梯形积分、辛普森积分以及3/8辛普森积分的基本性质进行推导,之后基于功率谱的思想,提出利用白噪声填满数据全部频域以及结合数值方法得到传递函数;最后对于实际测量得到的加速度信号,得到了米级口径望远镜镜面jitter的数值以及频域分布,同时证明...
TMT三镜系统tilt 轴轴承方案研究
30 m 望远镜项目 轴承布置形式 轴承模拟 有限元仿真
2016/8/4
30 m口径望远镜(TMT)的三镜跟踪系统(M3PA)的运动性能和指向精度指标均高于已建成的各大望远镜,且工况复杂多变,给设计人员带来了巨大的挑战。三镜跟踪系统包括Rotator 轴和Tilt轴两部分。重点研究了Tilt 轴轴承布置方案以及相应分析。提出了两种轴承方案,经过分析,使用一对双列角接触转盘轴承的方案更适合于Tilt 轴的工作需要,此时结构第一阶谐振频率可达到15.1Hz,满足Tilt ...