Its main contributions include the following several aspects : firstly , the dissertation constructs the mathematic model of short baseline orientation determination using two geostationary satellites and analyses the applicable conditions of carrier phase interferometry . orientation determination precision is analysed in depth through both the conventional linearized method and monte - carlo computer simulation method , and the mathematical simulation results show that the linearized method has the shortcoming of fairly low elevation error analysis precision in high latitude area so as not to be very appropriate there . by analyzing the definite factors influencing orientation precision , the dissertation develops the concept of orientation dilution of precision , which uncovers the internal cause of exotic error behavior of bi - satellite orientation , and has important guiding significance for practical engineering applications 本文系统地研究了基于“北斗一号”卫星载波相位干涉测量原理实现地球静止双星定向的相关技术,主要研究成果包括以下几方面:首先,建立了利用两颗地球静止轨道卫星进行短基线定向的数学模型,分析了载波相位干涉测量的适用条件;采用传统的线性化解析法及蒙特卡洛随机模拟法两种途径对双星定向的精度进行了详细分析,数学仿真结果表明在高纬度地区线性化解析法由于俯仰角误差分析精度略有下降而不太适合;在分析定向精度确定性影响因素的基础上,提出了双星定向精度衰减因子odop的概念,揭示了双星定向误差特殊表现的内部机理,对实际工程应用具有重要的指导意义。
This paper perfects a whole series of technical routes which begins at research of oil geology , then analysis of rock mechanics , migration theory stress and oil and gas , 3 - d fem mathematical simulation , 3 - d fracture simulation , and then integrative analysis of petroleum migration , finally , forecast of target area 2完善了从油田地质研究、岩(体)石力学分析、应力与油气运移关系、三维有限元数学模拟、油气运移分析到靶区预测的全系列技术路线。深化了三维有限元分析这一环节。
The mathematical simulation results indicate that the above developed method can realize ambiguity initialization within 30 seconds ( 1hz data rate provided ) with above 97 percent success rate as long as the pitch angle motion magnitude of vehicle is not less than 5 , and yield real time attitude resolution precision of 0 . 0742 in yaw , 0 . 0671 in pitch , and 0 . 0867 in roll using the antennae array with 数学仿真实验表明:当俯仰扰动幅度不小于5时,可在30s ( 1hz采样率)内以97 %的成功率实现双星定姿模糊度初始化,并且利用5m基线可达到偏航0 . 0742 、俯仰0 . 0671 、滚动0 . 0867的实时姿态解算精度。
In this article , on the basis of analyzing the millimeter - wave technology and its applications , the signal of objects and mathematical simulation of passive - method millimeter - wave are discussed , and the half - real simulation model are build , then the equivalent relationship of inner simulation and field experimentation is researched . at last , the practical way of criterions of measuring the passive - method millimeter - wave detection system is given on the basis of this method 论文在分析毫米波探测技术及其应用的基础上，讨论了毫米波被动式探测体制的目标信号及数学仿真问题，建立了相应的半实物仿真系统，并研究了室内仿真与野外试验的等效关系，最后给出了用该方法进行毫米波被动式探测体制系统指标测试的具体方法。
In boundary treatment , the model turns into generally adds coarseness boundary made of specially complex many coarseness body in the physical model experiment as the coarseness body highly and discharges the density to add the coarseness spot as the main characteristic whole , both to avoid the location within the body of this complex mathematical simulation problems , and could realize this model after to simulate the apron that adds the coarseness namely adds the coarseness section downriver speed of flow to the downriver current of water base speed of flow influence in to hang upward 该模型在边界处理时,将物理模型试验中由特别复杂的多个加糙体组成的加糙边界概化成以糙体高度为主要特征的整个加糙部位,既避开了对加糙体内部进行极其复杂数学模拟的这一难题,又能实现模拟海漫加糙段下游水流流速在垂向上的分布变化这一主要目的。在获得基本的入流流速分布、初始水位及加糙体的绝对高度和加糙段长度的情况下,能迅速模拟出加糙段下游各个断面在垂向上的流速分布情况。
