一种火力毁伤效能评估方法

Lanchester方程和Monte Carlo方法是作战模拟的常用方法,前者按取均值的方法处理作战过程,忽略了各种因素随时间的差异性,降低了模拟精度;后者对细节的要求较高,使问题变得复杂难解。结合两种方法,既充分考虑了作战问题的宏观规律性和局部共性,也顾及了其中关键因素的微观差异性和随机性,在火力毁伤效能模拟评估问题的应用研究中有较好的表现。     

滚动轴承故障诊断中的并行组合模拟退火算法研究

提出了一种基于并行组合模拟退火算法的故障识别新方法 ,详细讨论了该混合算法的原理及实现方法 ,并应用于滚动轴承早期故障诊断实例中 ,获得了好的结果 .     

系统辨识方法在微型飞行器建模中的应用

为对微型飞行器的飞行进行控制,需要建立其动力学模型。讨论了微型飞行器模型的系统辨识方法,设计了实验方法与采集装置,在数据处理、模型结构选择、模型评价等方面进行了探讨。简要介绍了输入输出端存在噪声时系统的线性最小二乘无偏辨识方法原理,最后给出了微型飞行器的纵向通道的仿真算例,结果表明,运用这种方法对微型飞行器进行建模是准确而有效的。     

粗集理论在目标识别信息处理中的应用

为提取传感器获得的较粗糙的原始信息,运用粗集理论进行目标识别信息的处理,提出了一种采用关系表存储原始信息,通过简化关系表删去冗余信息,从而达到提取有用信息的处理方法.根据此方法,实例中通过对生成的规则进行优选,得到了简单准确的目标识别规则.此理论在信息处理中的应用,较好地满足了目标识别中原始信息处理的需求.     

充分发展湍流管道内壁边界的红外定量识别

基于导热的管道内壁边界识别已发展成熟,但更贴合实际的湍流管道内壁边界的定量识别尚未见报道。通过关联COMSOL和MATLAB,利用有限元方法和Levenberg-Marquardt算法对二维轴对称充分发展的湍流管道内壁边界形状的稳态识别进行研究。数值实验证明了本方法的有效性。结果表明,在含内壁缺陷的湍流管道中,外壁最大温差和由缺陷引起的绝对温差并不是同步增加的;在进行内壁边界反问题识别时,由于绝对温差中负增长的出现,绝对温差越大,识别结果未必越好;识别精度在不规则内壁终点处略微变差。     

Volterra级数模型的非线性压缩测量辨识算法

针对非线性系统的辨识问题,提出了非线性压缩测量辨识算法,且推导出了一种符合压缩感知测量准则的测量模型。相比递归最小二乘法,该方法极大地减少了所需的测量数,使得高阶Volterra级数辨识成为可能。此外,还分析了实际应用中的各项因素对辨识准确性的影响,如信号稀疏度、测量噪声、测量矩阵形式等。     

Knowledge-oriented modeling for influencing factors of battle damage in military industrial logistics: An integrated method

Modeling influencing factors of battle damage is one of essential works in implementing military industrial logistics simulation to explore battle damage laws knowledge. However, one of key challenges in designing the simulation system could be how to reasonably determine simulation model input and build a bridge to link battle damage model and battle damage laws knowledge. In this paper, we propose a novel knowledge-oriented modeling method for influencing factors of battle damage in military industrial logistics, integrating conceptual analysis, conceptual modeling, quantitative modeling and simulation implementation. We conceptualize influencing factors of battle damage by using the principle of hierarchical decomposition, thus classifying the related battle damage knowledge logically. Then, we construct the conceptual model of influencing factors of battle damage by using Entity-Relationship approach, thus describing their interactions reasonably. Subsequently, we extract the important influencing factors by using social network analysis, thus evaluating their importance quantitatively and further clarifying the elements of simulation. Finally, we develop an agent-based military industry logistics simulation system by taking the modeling results on influencing factors of battle damage as simulation model input, and obtain simulation model output, i.e., new battle damage laws knowledge, thus verifying feasibility and effectiveness of the proposed method. The results show that this method can be used to support human decision-making and action.     

Dynamic modeling and parameter identification of a gun saddle ring

In this study, a theoretical nonlinear dynamic model was established for a saddle ring based on a dynamic force analysis of the launching process and the structure according to contact-impact theory. The ADAMS software was used to build a parameterized dynamic model of the saddle ring. A parameter identification method for the ring was proposed based on the particle swarm optimization algorithm. A loading test was designed and performed several times at different elevation angles. The response histories of the saddle ring with different loads were then obtained. The parameters of the saddle ring dynamic model were identified from statistics generated at a 50° elevation angle to verify the feasibility and accuracy of the proposed method. The actual loading history of the ring at a 70° elevation angle was taken as the model input. The response histories of the ring under these working conditions were obtained through a simulation. The simulation results agreed with the actual response. Thus, the effectiveness and applicability of the proposed dynamic model were verified, and it provides an effective method for modeling saddle rings.     

舰载雷达低空作战性能评估

根据美军用的ADC模型,结合低空目标的特点,提出对舰载雷达低空作战性能的评估方法,把性能评估的重点放在探测能力、定位能力、抗干扰能力和识别能力这四个能力因子上,并给出确定方法.所作研究可为定量分析舰载雷达对低空目标作战性能提供依据.     

基于数学形态学的机场跑道自动识别方法

如何自动、正确且快速地从遥感或航拍图片中检测战略目标,是导弹能否准确击中目标的关键,在军事领域具有重要意义.针对机场跑道目标的各种特性,提出一种基于数学形态学形态滤波和形态重构的机场跑道自动识别算法.实验结果表明,该方法识别机场跑道的效果良好.