排序方式: 共有23条查询结果,搜索用时 15 毫秒
1.
导弹线性分式变换模型及其在Hoo增益调度自动驾驶仪设计中的应用 总被引:1,自引:0,他引:1
釆用图形法建立了导弹线性分式变换(LFT)模型,将导弹动カ学明确描述为确定性与不确定性两部分,构造了线性参数时变(LPV)/μ控制结构,运用D-K-D迭代算法设计了导弹H∞增益调度自动驾驶仪。LPV/μ控制技术明确考虑了导弹的时变特性,设计生成的控制器能够在导弹飞行过程中自动进行参数调节,适应导弹动力学特性的变化,从而稳定自动驾驶仪的动カ学特性。_仿真结果表明:建立的线性分式变换模型能够准确描述导弹的动力学特性,同时所设计的H00增益调度自动驾驶仪的动力学特性基本与导弹飞行条件的变化无关。 相似文献
2.
Determining characteristics of the initial fixed-focus are a key technique for the design of laser beam riding guidance missile. Through analyzing the effects of the initial cone information field in guidance and control system of missile,those effects are considered as an approximate lead compensation network. The position and time of guidance spot initial fixed-focus can be designed. This method is applied to determine the characteristics of the initial fixed-focus of laser information field for a laser beam guidance gun-launched missile. The results of design and simulation show that the initial cone information field apparently speeds up convergence on the initial trajectory,and provides a guarantee for the implementation of minimum range index of a missile system. 相似文献
3.
It is comment that unmanned aerial vehicles (UAVs) have limitation on information cap- turing in reality applications. Therefore, online method of motion planning is necessary for such UA- Vs. Gyroscopic force (GF) is used for obstacle avoidance as an online method. However, classical GF has shortcoming in generating orbit for UAV with high velocity because the GF results in a time- varying turning radius. Modified gyroscopic force (MGF) given by function of velocity can overcome this shortcoming and help get a more practical control law for avoidance. MGF can also be used to implement the guidance of UAV by designing particular active conditions. Interactions in forms of stress function and damping force are introduced so that an UAV group can have coordinated motion. By combining controls of MGF and interactions, motion planning of UAV group in obstacle environ- ment can be implemented. 相似文献
4.
滚转导弹动态失稳的机理分析 总被引:1,自引:0,他引:1
将滚转导弹动力学系统描述为一个具有动态负反馈的闭环系统,分析了滚转导弹动态失稳的机理.基于滚转导弹扰动运动方程组,绘制了滚转导弹扰动运动结构图,经过简化,将滚转导弹描述为由2个二阶环节构成的具有动态负反馈的闭环系统.由此系统的开环特性出发,基于对数频率稳定性判据给出了马格努斯效应导致滚转导弹动态失稳的原因.给出了算例,结果表明,由开环稳定性分析得到的导弹动态稳定转速边界与采用基于闭环极点位置约束的通用转速边界计算公式所得到的结果是相同的. 相似文献
5.
6.
Trajectory design and simulation in injection phase for hyper-velocity kinetic energy missile 总被引:1,自引:1,他引:0
A movement law of laser beam facula is designed for the injection trajectory of hyper-velocity kinetic energy missile to eliminate the influence of motor exhaust smoke on laser signal transmission.Taking guidance loop of hyper-velocity kinetic energy missile as plant,a closed loop control system with desired step response characteristics is constructed and the movement law of laser beam facula for the missile injection trajectory is designed based on the output signal of the closed loop controller under a step input.Six degree-of-freedom trajectory simulations show that by the guidance of the laser beam facula moving with designed law,the missile can finish transition from the initial trajectory to a stable tracking trajectory without overshoot within the required time. 相似文献
7.
空面导弹弹道仿真方法研究 总被引:1,自引:1,他引:0
提出了一种空面导弹下滑段、俯冲攻击段的弹道优化设计方案,以及一种实现航向动态跟踪的具体方法。大量算例表明,采用本文中的空面导弹控制方案可以设计,调试出较满意的弹道,达到获取导弹飞行性能数据并验证导弹总体设计参数的目的。 相似文献
8.
9.
10.
对折叠串翼无人机发射展开过程的动力学分析是无人机总体设计和展开机构设计的关键。基于Newton-Euler方法建立描述串翼无人机展开的多刚体动力学模型。基于嵌套动网格方法计算机翼展开过程中的非定常气动特性,并与稳态气动参数进行比较。结合展开过程的气动特性变化和多刚体动力学模型,分析机翼展开速度和展开顺序对发射展开段弹道扰动的影响。仿真结果表明:机翼展开速度过快或者过慢都会对展开段弹道有较大扰动,当展开速度过快时惯性力起主要作用,当展开速度较慢时气动变化起主要作用;同时,前翼先展开、后翼后展开不利于初始发射段弹道的稳定,而前翼后展开、后翼先展开有利于初始发射段弹道的稳定;采用前后机翼同时展开且展开时间为0.20 s的展开方式能够满足尽量减小对弹道的扰动要求。 相似文献