The tactical missile seeker handover accuracy from midcourse to terminal guidance is researched . the small perturbation method is proposed to analyse error sensitivity of the seeker presetting parameters from error sources . firstly , the terminal guidance seeker presetting parameters are computed , based on the equations of a surface - to - air missile movement and a target movement . then the seeker presetting unaccuracy due to the command guidance radar measurement errors is also computed . it can be seen that the seeker presetting errors increase rapidly when the missile is close to the target , which leads to an important conclusion that the late seeker handover from midcourse to teminal guidance should be avoided 研究复合制导的战术导弹中末制导交班的导引头预定精度问题.提出用小扰动法分析导引头预定参数对误差源的误差敏感性关系.以中远程防空导弹为例，结合导弹运动方程组和目标运动模型，计算了中末制导交班的导引头预定参数，并计算了在制导站雷达测量误差下的末制导导引头预定参数的计算精度.可知，导引头定位参数的计算误差随着弹目距离的接近而显著增大，得到中末制导交班不能太晚的重要结论
Furthermore , it exp1ains the reason of tolerance and how to overcome and reduce tolerance thxough the ana1ysis of a tree of the tolerance source of the electronic belt weighing conveyor . giving the example of the tolerance analysis of the electronic belt weighing conveyor with double idlers and levers - it brings forwfard the measures to improt - e the precision and stabi1ity , and the ideas of sery ' iceability and maintenanceability . as a result , the proposal of the new type electronic belt weighing conveyor is put forward 接着，以电子皮带秤的误差源树展开分析，说明各误差产生的原因以及如何克服和减少误差的方法，再具体通过对本公司生产的双托辊双杠杆电子皮带秤进行误差分析，得出了提高电子皮带秤精度和长期稳定性的方法以及可维护性和可维修性的思想，进而提出了新型电子皮带秤的方案。
Abstract : the tactical missile seeker handover accuracy from midcourse to terminal guidance is researched . the small perturbation method is proposed to analyse error sensitivity of the seeker presetting parameters from error sources . firstly , the terminal guidance seeker presetting parameters are computed , based on the equations of a surface - to - air missile movement and a target movement . then the seeker presetting unaccuracy due to the command guidance radar measurement errors is also computed . it can be seen that the seeker presetting errors increase rapidly when the missile is close to the target , which leads to an important conclusion that the late seeker handover from midcourse to teminal guidance should be avoided 文摘:研究复合制导的战术导弹中末制导交班的导引头预定精度问题.提出用小扰动法分析导引头预定参数对误差源的误差敏感性关系.以中远程防空导弹为例，结合导弹运动方程组和目标运动模型，计算了中末制导交班的导引头预定参数，并计算了在制导站雷达测量误差下的末制导导引头预定参数的计算精度.可知，导引头定位参数的计算误差随着弹目距离的接近而显著增大，得到中末制导交班不能太晚的重要结论
Airborne photo - electric reconnaissance equipment , 3 . airborne photo - electric fire control and tracking system . based on the items about apsse we studied in recent years concerned with mobile measuring error , this thesis performed the study on the theory , and stressed on analysis and discussion the error species , error sources , error transfer relations of apsse 重点分析和探讨机载光电跟踪测量设备的测量误差的种类、误差源、误差传递的关系，并从系统的角度出发，建立机载光电跟踪测量设备测量误差的位置方程，为开拓和研究机载光电跟踪测量设备作必要的技术准备。
The concept of relative movement and the describing method of relative movement rate of dynamic measurement system are shown . a dynamic error neural network topology structure corresponding to the established system is designed . a cognizing matrix of error source and the transfer , classifying model of dynamic error source are put forward 叙述了动态测量误差的构成要素和表征，给出了动态测量系统的“相对运动”概念和相对变化率描述方法，设计了与所建模型相对应的动态误差神经网络拓扑结构，提出了误差源认知度矩阵和动态误差源传递、分类模型。
In this paper , accuracy design is completed through two steps : first , we analyze the error of parallel machine tool , the joints " gap are considered by using monte carlo method , also in mis part , three kinds of error sensitivity are established to wholly reflect the error of moving platform 在并联机床的精度设计部分，本文在并联机床的几何误差模型基础上，利用蒙特卡洛方法综合分析了包括铰链间隙的各项误差源对加工误差的影响，并建立了三类误差敏感度以全面评估并联机床的精度特点。
The model of influence upon the parallel between servo optic axis from the angle error of installation plans presented . whereby the theoretic analysis is carried out and the analyzing results are obtained . the method of obtaining the angle error through measuring the installation plans with three - coordinates measuring device and fitting the measurement data is put forward and pave a road for lessening the influence 对安装面角误差影响随动光轴平行性的问题也建立了数学模型，以此为出发点进行理论分析，给出了分析结果；提出用三坐标测量机测量安装面，通过拟合得到安装面的角误差；从而为减小这一误差源对随动光轴平行性的影响铺平了道路。
In this paper . the question of compound guidance about mid - long range air - to - air missle to be considered . the main contributions are as follows : first , two midcourse guidance laws are given . that is optimally predictable pn micourse guidance , which is suitable for middle range missle , and singularly perturbed midcourse guidance . which is suitable for long range missle guidance ; then two terminal guidance laws are given . that is variable structure guidance , which is suitable for passive radar guidance . and optimal guidance which is suitable for active radar guidance ; and then the error sourses of hand - off are researched , the hand - off law is given at the time ; fmally , the midcourse guidance laws and terminal guidance laws are tested by simulation , and the whole trajectory simulation are given through hand - off law , and the results are satisfied 主要工作如下：首先研究了用于中远程空空导弹复合制导的两种中制导律，即用于中程导弹的最优预测比例导引中制导律和用于远程导弹的奇异摄动中制导律，它们均有很好的中制导性能，能够满足中末制导的交班要求；接着研究了两种末制导律，即用于被动雷达末制导的变结构制导律和用于主动雷达导引头的最优末制导律，均适用于复合制导末制导段；然后分析了中末制导的交班误差源，讨论了用于复合制导的交接律；最后通过仿真，验证了提出的中制导律和末制导律，结合提出的交接规律，在不同的情况下对中末制导段弹道进行了仿真验证，结果证明文中提到的中末制导律能够达到性能指标要求。
The temperature response traces of electromagnetic parameters of absorbing materials are obtained . the measurement error is analyzed in this paper . the error sources are defined according to measurement theory and the value of each error source is obtained through experiment or theory analysis 根据测试原理确定误差源，由试验或理论分析的方法确定各个误差源的值，根据测试原理通过误差理论分析得到误差计算公式，最后对测试结果进行了测试误差计算，并对其他电磁参数的材料进行了测试误差模拟计算。
Based on in - depth analysis on characteristic and function principles of psd , combined with characteristic of measured object , this article presents an new real - time measurement for symmetrical degree , guiding - groove , twining angle , inside radius of long direction pipe ; completes designing work for hardware of function module and application software ; and gives analysis and computation on error sources and uncertain - degree of measure result . based on above work , this article develops a parameter - auto - chosen , integrated and automatic measurement device for beeline degree , guiding - groove symmetrical degree , twining angle and inside radius of long direction pipe 本文在深入分析研究psd的特点和工作原理的基础上，结合被测量对象的特点，首次提出了长定向管导槽对称度、缠角、内径等实时自动化测量的一种新方法；完成了硬件功能模块及应用软件的设计工作；并对测量结果的误差源及不确定度进行了分析和计算；在此基础上研制了长定向管的直线度、导槽对称度、缠角及内径等参数自动、实时综合测量设备。
