共查询到17条相似文献,搜索用时 328 毫秒
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针对虚拟武器装备行为仿真过程中存在的运动仿真复杂、多部件协调操作仿真困难等问题,本文基于虚拟现实建模工具构建了某型传统火炮的三维模型-虚拟火炮,为行军行为仿真过程中运动轨迹选取、运动姿态控制、碰撞检测及响应等问题提供了合理的解决方法;在用炮和收炮行为仿真过程中,重点设计了时间驱动算法来解决多部件之间的协调操作仿真问题。通过对虚拟火炮的特定行为进行可视化仿真,验证了文中行为仿真研究方案的合理性及算法设计的正确性。 相似文献
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CGF在作战仿真应用中的路径导航仿真始终是衡量CGF仿真逼真度的一个重要参考标准。通过分析CGF的运动原理,提出了静态、动态和综合三种路径导航规划的方法和相应的应用方向,重点对CGF在虚拟战场中导航点位置的转向问题进行了优化设计实现。实验表明,CGF模型能够真实再现虚拟作战实体的战场运动行为。 相似文献
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提出了一种分布虚拟战场环境中计算机生成兵力(CGF)实体行为调度方法,该方法由仿真结点对结点中运行的所有本地CGF实体及异地实体的远程模型所产生的行为进行集中式调度。通过本地CGF实体的兴趣域动态决定需要执行的异地实体远程模型行为的优先级及执行最后时限,通过将本地所有CGF实体的兴趣域合并,减少仿真结点需要调度的异地实体远程模型数量,进一步降低仿真结点的计算开销。该方法可以有效地确保分布虚拟战场环境对仿真实时性及真实性的要求。 相似文献
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在扼要介绍有关碰撞检测方法的基础上 ,着重研究一种基于TIN (TriangulatedIrregularNetwork)表达的物体之间的几何碰撞检测方法。有效地解决了其中的完整性控制问题 ,并在路径规划等系统中得以成功运用。 相似文献
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多转子-轴承系统虚拟样机建模及仿真 总被引:2,自引:0,他引:2
以LMS Virtual.Lab Motion为开发环境建立了某传动箱多转子-轴承系统虚拟样机,导入PRO/E模型文件进行简化,建立实体模型。针对目前所建立的齿轮传动系统虚拟样机过于简化的情况,建立了考虑时变啮合刚度的非线性扭转振动模型。通过组合副和用户自定义程序,实现了齿轮副和轴承端的耦合振动模型。仿真结果表明:通过虚拟样机仿真的方法获得载荷谱是可行的,其可用于深入研究传动箱的振动分析、强度校核和寿命预测。 相似文献
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《防务技术》2022,18(9):1643-1652
To objectively obtain the three-dimensional coordinates of the projectile fuze proximity explosion when projectile intersects the head of missile target, we propose a dynamic seven photoelectric detection screen test method, which is made up of six plane detection screens and a flash photoelectric dynamic detection screen. The three-dimensional coordinates calculation model of the projectile proximity explosion position based on seven plane detection screens with dynamic characteristics is established. According to the relation of the dynamic seven photoelectric detection screen planes and the time values, the analytical function of the projectile proximity explosion position parameters under non-linear motion is derived. The projectile signal filtering method based on discrete wavelet transform is explored in this work. Additionally, the projectile signal recognition algorithm using an improved particle swarm is proposed. Based on the characteristics of the time duration and the signal peak error for the projectile passing through the detection screen, the signals attribution of the same projectile passing through six detection screens are analyzed for obtaining precise time values of the same projectile passing through the detection screens. On the basis of the projectile fuze proximity explosion test, the linear motion model and the proposed non-linear motion model are used to calculate and compare the same group of projectiles proximity explosion position parameters. The comparison of test results verifies that the proposed test method and calculation model in this work accurately obtain the actual projectile proximity explosion position parameters. 相似文献
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虚拟环境下柔性线缆建模方法 总被引:2,自引:0,他引:2
研究了虚拟环境下柔性线缆建模方法,给出了离散控制点线缆简化模型和计算各离散控制点坐标值的算法。针对柔性线缆在虚拟环境中的碰撞检测问题,具体分析了从物体侧面绕过和从物体上表面经过2种碰撞检测情况,基于深度矢量和体矢量碰撞检测算法,给出了碰撞检测响应算法。 相似文献
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Single- and multi-facility location problems are often solved with iterative computational procedures. Although these procedures have proven to converage, in practice it is desirable to be able to compute a lower bound on the objective function at each iteration. This enables the user to stop the iterative process when the objective function is within a prespecified tolerance of the optimum value. In this article we generalize a new bounding method to include multi-facility problems with lp distances. A proof is given that for Euclidean distance problems the new bounding procedure is superior to two other known methods. Numerical results are given for the three methods. 相似文献