基于人因工程学的民用直升机驾驶舱布置

民用直升机驾驶舱布置在局方审查的过程中,暴露了不少问题,主要体现在人机功效上。通过对人因工程学在驾驶舱布置中所涉及的学科的研究,系统地梳理了驾驶舱布置需要考虑的因素及遵循的原则,从而提高驾驶员满意度并确保飞行安全。     

新型免抬式电动刀架的研究

本文介绍了一种ＣＮＣ机床新型免抬式电动刀架的机械结构及控制电路。该电动刀架采用梯形螺柱螺套副升降机构，可使刀架转位分度时无需抬起上刀体。刀架转位分度采用机－ 电结合的方法，即先在控制电路中使用霍尔元件进行粗定位，再在机械上采用三齿盘实现精定位。     

液位多级网络控制系统的设计

论文采用OPC技术设计了液位多级网络控制系统.该系统可在现场操作级、工程师站、专家站三级控制网络之间实现信息共享,控制效果良好.     

一种用于液晶曝光中的激光检测系统

介绍了一种非接触式激光检测系统，可用于检测液晶曝光中液晶模板与基板之间的间隙，给出了该种系统的测量原理、硬件系统、信号处理方法、测量结果、分辨力和误差分析，并指出了这种测量系统的应用。     

Stability analysis of an aeroelastic system with friction

In this paper, harmonic balance method, exact formulation and numerical simulation method are adopted to study the effects of different friction stiffness on the stability of 1.5 degrees of freedom aeroelastic system. On this basis, the expressions of input energy and dissipated energy are deduced, and the energy method is used to reveal the mechanisms of the stable boundary and unstable boundary existing in the system and the effects of different friction stiffness on the stability of the system. Studies have shown that the stability region and the critical aerodynamic damping ratio of the system rise with the increase of the friction stiffness, while the friction stiffness has little effect on the stability boundary. In the analysis of the stability of system, the results of harmonic balance method, exact formulation and Newmark of numerical simulation method are in good agreement. Compared with exact formulation and numerical simulation method, the concept and conclusion of harmonic balance method are simple in the system stability analysis.     

蒙特卡洛方法在降落伞-返回舱系统中的应用

文章简要介绍了蒙特卡洛方法的起源和基本思想，随机数和随机抽样的产生方法，同时，基于蒙特卡洛方法的基本思想提出了用数值方法计算飞船返回舱着陆姿态参数的初步设想。对于此问题的研究，将有助于节约试验经费，分析返回舱缓冲结构的设计合理性及可靠性。     

Corrosion Inhibition of SiC_p/5A06 Aluminum Metal Matrix Composite by Cerium Conversion Treatment

This article studies the effects of the CeCl₃ concentrations in conversion solutions with and without addition of NaCl, pH-values of conversion solution, drying temperature, time and temperature of immersion on the Ce-conversion coatings for corrosion protection of the SiC_p/5A06 Al-MMC and 5A06 Al-alloy in the 3.5% NaCl aqueous solution at room temperature. Potentiodynamic polarization tests reveal that the Ce-conversion treatment could markedly improve the pitting corrosion resistance of the composite and the matrix alloy in chloride containing environment. The best corrosion resistance effects are obtained for the samples treatment in 1‰ CeCl₃·7H₂O/ 3.5% NaCl solution at 45 °C for 60 min, followed by drying at 100 °C for 30 min. Examinations by means of scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) indicate that this behavior is due to the precipitation of Ce-oxides/hydroxides on the cathodic intermetallics and the Al-oxide film on the rest of the metal matrix.     

公共场所火灾公众责任险风险评估及核保模型研究

介绍了目前我国公共场所火灾的现状及火灾公众责任险强制性实施的必要性.通过建立公众场所火灾风险评价指标体系,运用多层次模糊综合评价理论对公众场所火灾危险性进行综合评估.最后依据评估结果对火灾公众责任险费率进行浮动,确定科学合理的费率水平和责任限额.     

固体推进剂使用寿命快速预测探索研究

研究了活化能法快速预测推进剂使用寿命，结果表明，点斜法与常规加速老化方法结果基本一致，两点法（７０℃、５０℃）预测结果最接近。提出用动态法求活化能用于点斜法进行快速寿命预测。