排序方式: 共有45条查询结果,搜索用时 15 毫秒
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基于hp自适应伪谱法的变后掠翼导弹弹道优化设计 总被引:1,自引:1,他引:0
为了提高变后掠翼导弹的终端速度,对其末端弹道优化问题进行了研究。基于终端速度最大,采用后掠角和攻角双变量优化方案,建立了在动压、过载及边界条件等多约束条件下的弹道优化模型。鉴于全局伪谱法在解决复杂多约束条件下最优控制问题存在的局限性,采用将全局伪谱法与hp型有限元法融合的hp自适应伪谱法,将弹道优化问题转化为非线性规划问题,并将仿真结果与已有的粒子群算法的最优弹道对比,验证了模型和方法的正确性。结果表明,采用hp自适应伪谱法得到的最优弹道在保证了较高的命中精度的前提下,能够以更高的终端速度和更佳的弹体姿态攻击目标。 相似文献
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According to requirements of the bank-to-turn (BTT) control for a small diameter bomb (SDB), the robust design problem for the roll autopilot was studied by H∞-mixed sensitivity control method. A roll channel dynamics model was established. Considering the couple between the yaw and roll channel as uncertain disturbance, the roll autopilot was designed using dual-loop scheme which takes a linear quadratic regulator (LQR) as inner-loop, to ensure the control effect of the certain part in model, and an H∞-mixed sensitivity control as outer-loop, to restrain coupling disturbance and strengthen the system's robust performance. The dynamic tracking performance and the robustness for the parameter disturbance of the roll controller were analyzed. The simulated results show that the roll control system functions better and robustly. 相似文献
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变后掠翼航弹滑翔弹道优化设计 总被引:1,自引:0,他引:1
为增强变后掠翼航弹的滑翔能力,研究了一种变后掠翼航弹的滑翔弹道优化设计问题.分析了变后掠翼航弹的气动特性,将弹道优化问题转化为最优控制问题,利用最小值原理,推导了滑翔段飞行距离最大的必要条件,在此基础上采用粒子群算法对攻角及后掠角进行寻优,形成了一种基于攻角与后掠角双变量控制的弹道优化设计方法.数值仿真算例表明,在满足状态方程约束的条件下,双变量比固定外形和常规单变量控制的航弹射程显著提高,寻优结果符合气动特性分布规律,通过最优控制和粒子群算法优化弹道的方法是可行的. 相似文献