自学习自适应INS／Doppler组合导航系统

本文通过引入文［１］提出的自学习适应Ｋａｌｍａｎ滤波，而将氢此组成的具有自学习功能的智能组合导航系统直接建立在噪声分布密度的异步自学习估计上，由于此时的ＬＡＫＦ在每次重复滤波实验后可离线异步地学习模型与量测噪声的统计特性，从而可有效地避免滤波发散现象并能确保实时性。文中结合某飞行器，对ＩＮＳ／Ｄｏｐｐｌｅｒ组合导航系统进行了仿真研究，所得结果十分满意。     

基于H∞滤波技术的GPS/INS全组合导航系统研究

本文根据H∞鲁棒滤波理论，提出了基于H∞滤波技术的GPS/INS全组合导航系统。该系统仅含有位置误差、速度误差和平台误差角9维状态，并利用GPS和INS的位置、速度和姿态观测信息对全部状态进行观测，组成全松组合导航系统，由H∞滤波来提高系统的鲁棒性。文中对提出的全组合系统进行了动态仿真，仿真结果表明，该系统结构简单，状态估计精度较高，系统鲁棒性好，便于工程实现，坚实际工程应用具有重要的现实意义。     

GPS／惯性组合导航系统导航性能的仿真与分析

本文从卡尔曼滤波的基本原理和几何精度因子GDOP的物理意义出发,并结合实例的仿真计算结果,讨论GPS/惯性组合导航系统的定位和测速精度。结果表明:由于位置和速度的双重组合,且由于卡尔曼滤波具有利用以前所有测量值的能力,以及综合利用GPS和惯导信息的能力,所以组合系统的精度虽仍与GDOP有关,但却高于单独利用GPS接收机点解法得到的定位和测速精度,其中定位精度的提高更为显著。     

便携式红外寻的防空导弹——单通道控制的自动驾驶仪

导弹采用单通道控制，虽然系统简单，但控制技术复杂。从这类自动驾驶仪特点出发，在介绍其功能、组成、控制方式基础上，对设计、分析、试验中遇到的技术问题提出了解决途径和方法，并对此类驾驶仪的数字化问题提出了设想和看法。     

多用途飞机使用效能指标体系研究

根据我国国情与通用航空现状,多用途飞机是未来通用航空主要发展方向之一,对多用途飞机效能进行有效评估具有重要意义,而建立科学的评估指标体系是保证效能评估结果科学有效的前提和基础。在列举效能评估方法及飞机效能指标的基础上,初步建立多用途飞机使用效能指标体系,将多用途飞机综合使用效能分为4层,其中第一层级单项作业效能可进一步...     

Real-time fault detection method based on belief rule base for aircraft navigation system

Real-time and accurate fault detection is essential to enhance the aircraft navigation system’s reliability and safety. The existent detection methods based on analytical model draws back at simultaneously detecting gradual and sudden faults. On account of this reason, we propose an online detection solution based on non-analytical model. In this article, the navigation system fault detection model is established based on belief rule base (BRB), where the system measuring residual and its changing rate are used as the inputs of BRB model and the fault detection function as the output. To overcome the drawbacks of current parameter optimization algorithms for BRB and achieve online update, a parameter recursive estimation algorithm is presented for online BRB detection model based on expectation maximization (EM) algorithm. Furthermore, the proposed method is verified by navigation experiment. Experimental results show that the proposed method is able to effectively realize online parameter evaluation in navigation system fault detection model. The output of the detection model can track the fault state very well, and the faults can be diagnosed in real time and accurately. In addition, the detection ability, especially in the probability of false detection, is superior to offline optimization method, and thus the system reliability has great improvement.     

Real-time coseismic wave retrieving by integrated Kalman filter with observations of GPS,Glonass and strong-motion sensor

A method of real-time coseismic wave retrieving was proposed based on the tight integration of GPS, Glonass and strong-motion sensor observations, the validation and precision analysis have been made by an experimental data. The series of results have been shown that: by the integrated Kalman filter and multi-sensors, the coseismic waves can be optimally recovered by complement the advantages of each other, especially when the observation conditions are very bad. In additional, the results are not significantly effected by different receiver clock error processes for the integration solution.     

旅游目的地的整合营销策略探析

随着旅游市场的逐步成熟和竞争的不断加剧，旅游目的地树立正确的营销观念是获得竞争优势、占领市场的关键。旅游业的广泛性和多样性，使得目的地非常适宜进行整合营销。本文运用整合营销理论，分析旅游目的地的整合营销策略，主要分析旅游目的地形象的整合、营销组合策略的整合以及品牌信息传播的整合。     

航空专用测试设备可计量性设计

提出了航空专用测试设备可计量性设计的概念,将专测设备设计与计量联系起来,从设计源头就考虑计量的方便,对航空综合后勤保障建设有积极意义。