摘要:Aimed at the requirements of naval surface fire support combat mission,the system composition and function of American Naval Surface Fire Support System (NSFS)and the pocket-sized forward input device which was used to keep NSFS operation were introduced.U-sing it as a reference,the function requirements and system consists of the forward observe portable device which is suitable to China naval surface fire support operation was analyzed,the development route of the system from design to realization was planned,and the operational mode and flow process that may be caused by the system were assumed,which can provide re-ference for the development of navy equipment.%针对我海军对水面舰艇实施精确对岸火力支援任务的需要,介绍了美国海军对岸火力支援系统以及支撑该系统运转的袖珍式前线接入设备的系统组成与功能,以此为借鉴,探讨了适用于我海军火力支援作战的便携式前线侦察系统的功能需求,分析了其系统组成,对该系统从设计到实现的发展路线进行了规划;并对该系统可能带来的作战样式及其流程进行了想定,为我海军装备发展规划提供借鉴。
摘要:为研究某轻型炮射击过程中的架体结构动强度问题,基于非线性有限元理论,建立了该轻型炮刚柔耦合动力学非线性有限元模型,模型中考虑了土体本构模型、座圈及方向机刚度、结构土壤相互作用、架体销轴接触等非线性关系。计算获取了该轻型炮4种射击工况下的下架、后大架及连接销轴的动态应力分布规律,找出了原下架结构方案中强度设计的薄弱环节,并提出了下架结构的改进方案。计算结果表明:改进后下架结构最大应力值降幅达42.7%,且下架质量减少了10 kg。计算结果对指导该轻型炮下架结构设计具有一定的工程应用价值。%In order to study the dynamic strength of carriage for a lightweight howitzer during firing,a rigid-flexible coupling dynamics nonlinear finite element model of the howitzer was built based on the nonlinear finite element theory .The nonlinear relations of soil constitutive model,stiffness of turret race and traversing mechanism,interaction between structure and soil and contact between carriage and pins were considered simultaneously in the model.Dynamic stress distribution law of bottom carriage,rear trial and pins in four firing conditions of the lightweight howitzer were calculated,bottlenecks in strength design of original bottom carriage were found,and a modified structure of bottom carriage was proposed.The calculation results show that the maximum stress of modified bottom carriage reduces 42.7% and the weight re-duces 10 kg.The results show its important engineering value for the design of bottom carriage of the lightweight howitzer.
摘要:The terminal ballistic model was established according to the classical empirical for-mula that commonly used at home and abroad.On the basis of this model,the numerical simu-lation was carried out and the simulation results agreed with experimental data,so that the cor-rectness of the model and the feasibility of the algorithm were validated.Then took the lethal area for the enemy combatant on the ground as the optimization goal,the charge structure, thickness of the shell and initiating conditions as optimization parameters,the constraint condi-tions of optimization variables determined by the design criterion of the projectile,the optimiza-tion model was established adopted genetic algorithm.The methods and results of the optimal design will provide reference for the design of whole trajectory of high explosive projectile.%根据国内外常用的经典终点弹道经验公式,建立了终点毁伤模型,并以该模型为基础进行了数值模拟计算,模拟计算结果与实际试验数据一致性较好,从而验证了该模型的正确性和算法的可行性。与此同时,以所建立的终点毁伤模型为基础,对战斗人员的杀伤面积作为优化目标,建立了基于遗传算法的最优化模型,对装药结构、壳体厚度和起爆条件等重要参数进行优化,优化变量的约束条件根据弹丸的相应设计准则确定。优化设计的方法和结果可以为杀爆弹战斗部威力设计及后续的全弹道设计提供依据。
摘要:针对自行高炮位置伺服系统跟踪速度要求高、射击时干扰强、跟踪精度对信号噪声敏感的特点,提出了一种基于跟踪微分器的分数阶控制律的改进方案。通过合理的假设和近似,建立了自行高炮位置伺服系统的饱和非线性模型;在此基础上设计了主令和反馈通道上的跟踪微分器,以滤除信号噪声得到工程实用的微分信号;再经由分数阶 PID 控制器得到控制量,以增加系统带宽。比较分析了设计的控制律与传统整数阶 PID 控制器在伺服跟踪和冲击力矩干扰下的控制效果。仿真结果表明,采用提出的方法能提高自行高炮响应速度和增加系统带宽,有效抑制噪声信号和外部力矩干扰。%A modified fractional-order control method based on tracking-differentiator was pro-posed for position servo system of self-propelled antiaircraft gun with the characteristics of high tracking speed,strong firing disturbance and sensitiveness to signal noise.Under reasonable hypotheses and approximations,a saturation nonlinear model of gun position servo system was established.Then tracking-differentiators were designed in master signal and feedback channels to weaken the noise and get practical differential signal.The controlled quantity output was calculated out by a fractional-order PID controller to increase the system bandwidth.Further more,the control effects of proposed control laws were compared with traditional integer-order PID controller in the situation of servo tracking and disturbance of impact moment respectively. The simulation results show that the proposed method can increase the response speed of the self-propelled antiaircraft gun and system bandwidth,which can effectively restrain the noise as well as external moment disturbance.
摘要:针对舰炮武器系统作战效能准确评估问题,提出了一种基于 ADC 法的作战效能评估模型。根据舰炮武器系统的特点,给出了有效性向量和可信赖性矩阵的评估模型;在能力向量的评估模型中提出了舰炮对目标的射击效能应与舰炮毁伤目标的概率、传感器跟踪能力、火炮瞄准能力及火炮的射击区域有关,并给出了具体的计算模型,有效解决了能力矩阵的准确评估的难题。以某小口径舰炮武器系统作战效能计算为例,给出了模型的应用实例。该模型可操作性强,能准确评估舰炮武器系统作战效能。%Aimed at the problem of operational effectiveness evaluation of naval gun weapon system,an effectiveness evaluation model based on ADC (Availability,Dependability and Ca-pability)method was proposed.According to the characteristics of naval gun weapon system, the evaluation model of the availability vector and dependability matrix was given.In the evalua-tion model of capability vector,the fire efficiency of naval gun was considered that has relations with tracking ability of sensor,damage probability,sighting capability and fire zone of gun,as well as the calculation model was given to evaluate exactly the capability matrix.Take the op-erational effectiveness calculation of the small caliber naval gun weapon system as an example, the model was applied.The results show the model can be used easily and evaluate exactly the operational effectiveness of naval gun.