自行高炮射击信息自动监测系统设计

为实现对自行高炮射击信息的自动快速感知,文章设计并实现了火炮射击信息自动监测系统。该系统采用传感器对射击中浮动机工作状态信息进行实时采样并通过分析,实现了对火炮技术性能与工作状态的全面掌握,为装备保障决策和作战能力评估提供了直接信息来源。     

Numerical simulations of self-propelled swimming of 3D bionic fish school

Numerical simulations of self-propelled swimming of a three dimensional bionic fish and fish school in a viscous fluid are carried out. This is done with the assistance of a parallel software package produced for 3D moving boundary problems. This computational fluid dynamics package combines the adaptive multi-grid finite volume method, the immersed boundary method and VOF (volume of fluid) method. By using the package results of the self-propelled swimming of a 3D bionic fish and fish school in a viscous fluid are obtained. With comparison to the existing experimental measurements of living fishes, the predicted structure of vortical wakes is in good agreement with the measurements. Supported by the Key Project of National Natural Science Foundation of China (Grant No. 10532040)     

自行走全液压载重车转向系统仿真与试验研究

阐述了采用负载敏感技术的自行走全液压载重车转向系统的设计,使用AMESim和MATLAB软件对转向系统进行了联合仿真,分析了液压系统的动态特性,采用带死区的PID控制策略。仿真结果表明,与常规PID控制相比,带死区的PID控制对载重车转向系统的控制效果更好,通过与现场试验所得数据相比较,仿真曲线与实测曲线基本吻合,验证了仿真模型的正确性和控制策略的可行性。     

大型自行式伸缩舞台的设计与研究

成功地设计了大型自行式伸缩舞台，提供了球结点网架作为伸缩台体的经验实例，对该设备的受力、运动及动力性能进行了比较详尽的分析，导出了具有实用价值的动力性能判定公式，按照该公式分析同类设备的动力性能并选择设计参数，使设计更趋合理。     

PBC200型多轴线自行式铁水罐运输车的研制

对一种多轴线自行式动力运输车的主要参数、基本结构及组成系统进行了详细阐述,对其特点及应用做了说明,为相关专业车辆设计及应用提供参考。     

自行火炮维修决策专家系统的设计与实现

为解决传统故障诊断方法在装备维修保障方面的不足,将故障预测引入到装备维修保障领域,提出了基于动态模糊综合评判的故障预测模型。基于动态隶属度对服役期间故障的发生、发展和系统性能下降的动态变化过程进行描述．给出了动态权重矩阵、动态隶属度的确定方法和常见的隶属函数。并以火炮反后坐装置为例对预测过程予以说明,证明了该方法的有效性和实用性。     

高温梯度锯齿表面液滴运动特性

利用铝片制备了不同高度、倾角由小到大连续变化的梯度锯齿表面,采用高速摄影技术对高温梯度锯齿表面自推进液滴的运动行为进行了探讨,并和常规锯齿进行了比较。结果发现:液滴可以在一定温度梯度锯齿表面发生由锯齿倾角小的方向往倾角大的方向的定向运动,并且运动的加速度和锯齿高度以及锯齿表面温度有关;随着锯齿高度的增加,液滴运动的平均加速度呈逐渐减小的趋势;而随着锯齿表面温度的增高,液滴的平均加速度则经历从减小到增大的两个阶段。     

自行防空系统发展简介

针对空面武器的新特点,对改进自行防空系统的有关技术作了介绍,主要包括弹炮结合、多弹合一轻型防空武器、利用高新技术改进火炮等,并介绍了未来防空系统发展可能用到的新武器和新技术。     

Modelling group navigation: transitive social structures improve navigational performance

Collective navigation demands that group members reach consensus on which path to follow, a task that might become more challenging when the group''s members have different social connections. Group decision-making mechanisms have been studied successfully in the past using individual-based modelling, although many of these studies have neglected the role of social connections between the group''s interacting members. Nevertheless, empirical studies have demonstrated that individual recognition, previous shared experiences and inter-individual familiarity can influence the cohesion and the dynamics of the group as well as the relative spatial positions of specific individuals within it. Here, we use models of collective motion to study the impact of social relationships on group navigation by introducing social network structures into a model of collective motion. Our results show that groups consisting of equally informed individuals achieve the highest level of accuracy when they are hierarchically organized with the minimum number of preferred connections per individual. We also observe that the navigational accuracy of a group will depend strongly on detailed aspects of its social organization. More specifically, group navigation does not only depend on the underlying social relationships, but also on how much weight leading individuals put on following others. Also, we show that groups with certain social structures can compensate better for an increased level of navigational error. The results have broader implications for studies on collective navigation and motion because they show that only by considering a group''s social system can we fully elucidate the dynamics and advantages of joint movements.     

机器鱼自主游动中变形体耦合动力学的数值研究

为机器鱼的自主巡游、机动转弯和"加速—滑行"游动的动力学特性研究做准备,结合样机试验数据来证明所选驱动方式的优越性,提出一种新的求解机器鱼自主游动动力学的数值算法。认为鱼体质心在绝对系下的运动是由流体外力与自身主动变形共同作用的结果;运用离散化方法推导出新的鱼体域的控制方程,从而提出新的算法。给定鱼体系下机器鱼的主动变形方程,通过耦合求解鱼体域、流体域的控制方程,得到机器鱼的运动过程中的运动学和动力学参数。通过自主游动算例验证了所提数值算法的正确性。