某卫星真空热试验中一些新要求的解决措施

某卫星在进行真空热试验时,对热流提出了三个方面的新要求：(1)对某些热流要求较低的加热区的加热笼进行修改,提高其低热流实现能力;(2)减小支架漏热;(3)实时计算设计热流和实际热流的周期积分偏差。由于修改时的约束条件较多,新的要求的满足非常困难。经过努力,最终解决了这些问题,通过对某些加热笼采取加热带双面涂黑漆的方法,实现了低热流;经过计算和针对性的设计,支架漏热不超过0．1188W;同时实现了设计热流与实际热流周期积分偏差的实时计算。     

电弧加热发动机羽流电子温度的探针诊断

电弧加热发动机(Arcjet)由于其比冲远高于传统的使用化学推进剂的发动机,近年来引起了愈来愈多的关注。文章建立了一套在真空环境下利用静电探针诊断技术测量Arcjet羽流电子温度的实验装置, 并且对以氩气为工质的 Arcjet 的羽流进行了测量, 得到了羽流电子温度的轴向和径向分布情况, 以及电子温度随电弧电流和工质流量变化的趋势。实验结果表明Arcjet羽流轴线处的电子温度远大于重粒子温度。     

KM6空间环境模拟设备运动模拟器内腔温度控制设计方案

文章在运动模拟器初始通风冷却温度控制方案的基础上, 提出了风扇换热器组件冷却方案, 并采用CFD模拟两种方案下模拟器内部流场和温度场分布。此外, 为了验证风扇换热器组件冷却方案的可行性, 采用遗传算法进行了三流程板翅式换热器的优化设计。计算表明风扇换热器组件冷却方案可行有效, 明显改善运动模拟器内部气体流动和换热。     

航天器多功能结构传热特性的实验研究

针对航天器结构高性能、轻质化和集成化的发展要求,设计了集电路控制,热管理功能和结构承载功能于一体的多功能结构。此种结构分别采用柔性电路板控制热仿真多芯片模块,作为多功能结构的热源;碳碳材料作为热倍增器;复合材料蒙皮和金属泡沫芯子的夹层结构作为承载结构,实现了结构和功能的集成。同时,为了研究多功能结构的传热特性,进行了热真空实验,实验测量了热流密度和温度梯度。结果表明这种新型的结构可以消散飞行器多芯片模块产生的热量,碳碳热倍增提供了一种减小温度梯度的新方法,同时这种多功能结构减少了结构的体积,降低了结构的质量。     

用于实现LTCC双平衡混频器的宽带巴伦设计

文章介绍了一种用于实现C频段LTCC（Low Temperature Co-fired Ceramic。低温共烧陶瓷）双平衡混频器的宽带巴伦设计。该巴伦是基于LTCC技术设计的多层结构巴伦,利用了LTCC多层技术的优点,采用宽边耦合线结构,可增加耦合线的耦合系数,从而可增加巴伦的带宽。设计的巴伦频率范围为5．575GHz-6．775GHz,具有插损小、平衡度好等优点,可应用于C频段LTCC7,K平衡混频器。文章介绍了Marchand巴伦的工作原理,描述了所设计巴伦的3D结构,并给出了设计仿真的结果。     

Long-period meteor radar temperature variations over Collm (51°N, 13°E) and Kazan (56°N, 49°E)

We have estimated temperatures from meteor radar measurements using the gradient method and the full width at half maximum method over Kazan (56°N 49°E) and Collm (51°N, 13°E). The time series cover the period 2016–2019. The temperature gradient model is constructed from SABER temperature observations. We demonstrate that annual mean, amplitudes and phases of the annual and semiannual oscillations of the radar temperatures are close to those of the MLS and SABER temperatures. The annual mean temperatures over Kazan and Collm differ non-significantly. The seasonal variability of the radar temperature is mostly due to the annual cycle which tends to grow with latitude. The gradient method produces temperatures which agree with the SABER temperatures better than with the MLS ones. The harmonics of the annual oscillations from periods of 73 days up to periods of about 40 days are the most significant day-to-day temperature oscillations and have zonal wavenumber zero. Their periods and phases are in good correspondence with those of the MLS and SABER ones. We also show some results which demonstrate that at 56°N the FWHM method is not as robust as the gradient method.     

Influence of solar-geomagnetic disturbances on SABER measurements of 4.3 μm emission and the retrieval of kinetic temperature and carbon dioxide

Thermospheric infrared radiance at 4.3 μm is susceptible to the influence of solar-geomagnetic disturbances. Ionization processes followed by ion-neutral chemical reactions lead to vibrationally excited NO⁺ (i.e., NO⁺(v)) and subsequent 4.3 μm emission in the ionospheric E-region. Large enhancements of nighttime 4.3 μm emission were observed by the TIMED/SABER instrument during the April 2002 and October–November 2003 solar storms. Global measurements of infrared 4.3 μm emission provide an excellent proxy to observe the nighttime E-region response to auroral dosing and to conduct a detailed study of E-region ion-neutral chemistry and energy transfer mechanisms. Furthermore, we find that photoionization processes followed by ion-neutral reactions during quiescent, daytime conditions increase the NO⁺ concentration enough to introduce biases in the TIMED/SABER operational processing of kinetic temperature and CO₂ data, with the largest effect at summer solstice. In this paper, we discuss solar storm enhancements of 4.3 μm emission observed from SABER and assess the impact of NO⁺(v) 4.3 μm emission on quiescent, daytime retrievals of Tk/CO₂ from the SABER instrument.     

一类智能控制器及其在水浴箱控制中的应用

提出了一种智能控制新方法，其特点是控制决策不仅是直接控制作用输出，而且还包含了解析算法，改善了通常基于规则的智能控制器的稳态性能。实际应用于大型水浴箱的非线性温度控制系统取得了良好的效果。     

TCM-2热电偶自动检定系统

ＴＣＭ－２热电偶自动检定系统，采用人机对话的形式，改变了以往检定热电偶的手工操作过程。以微机为中心，配以高精度的控浊信和多通道检测系统，自动控温，进行数据采样与处理，并直接打印检定结果。设有计算和检索的辅助功能。满足国家检定规程的要求。     

Comparison of calculation models for determination of the mesopause temperature using SATI images

The Spectral Airglow Temperature Imager is an instrument for ground-based spectroscopic measurements of the night-glow atmosphere emissions. This instrument was developed specially for gravity wave investigation. The measured airglow spectra are matched to synthetic spectra calculated in advance for determination of the temperature in the mesopause region where the radiation maximum of some О₂ emissions is situated. The synthetic spectra are transformed into a format which corresponds to the measured spectra in order to be matched. This transformation is based on the known values of the refractive index and the central wavelength of the interference filter used. A substantial part of the processing algorithms of the SATI images is connected with determination of these two filter parameters. The results of the original and newly-proposed algorithms for filter parameter calculation and their importance for the final results for temperature determination on the basis of the О₂ (864–868 nm) emission measurements are presented.