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摘要:
根据公开资料对THAAD增程型拦截弹建模,针对大射程的特点规划了高抛弹道,生成标准弹道族。提出了迭代预测命中点法,利用解析方法计算剩余飞行时间,基于多项式拟合法寻找标准弹道,确定预测命中点,完成预测制导任务。将迭代预测命中点法与迭代飞行时间法进行对比,迭代预测命中点法初值选取容易,程序运行时间减少20%,制导过程中无需调用标准弹道文件,节省了计算机存储空间。通过改变射程、航路捷径对预测制导方法进行仿真验证,结果表明,拦截弹拦截射程可覆盖到600 km,并且能完成存在航路捷径时的拦截任务,平均脱靶量在200 m以内,应对气动不确定性的效果良好。
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关键词:
- THAAD增程型拦截弹 /
- 预测制导 /
- 标准弹道族 /
- 预测命中点 /
- 剩余飞行时间
Abstract:Based on public information, the model of THAAD-ER interceptor was established. Aimed at longer range, the high throw trajectory was planned, and a bunch of standard trajectories were produced. Predicted impact point iterated method is proposed, which contains solving time-to-go with analytic solution, seeking out the expected standard trajectory with polynomial fitting, and ascertaining the predictive impact point, and finally predictive guidance completes. Comparison is taken between predicted impact point iterated method and flight time iterated method, and it is easy to choose initial value with predicted impact point iterated method, and the program runtime decreases by 20%; standard trajectory files are not necessary during guidance process, which can save storage space of the computer on the interceptor. Large amount of simulations were carried out with different range and course shortcut, and the results show that interception range of THAAD-ER interceptor can reach 600 km, and the interception task can be completed with average miss distance less than 200 m when course shortcut remains. It has a good response to aerodynamic uncertainty.
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表 1 助推器参数
Table 1. Parameters of boosters
级数 质量/kg 推力/kN 燃烧时间/s 1 860 80 30 2 170 30 8 表 2 程序运行时间对比
Table 2. Program run time comparison
仿真次数 设定迭代飞行时间法运行时间/s 设定迭代飞行时间法脱靶量/m 设定预测命中点法运行时间/s 设定预测命中点法脱靶量/m 运行时间节省比例/% 脱靶量减少比例/% 1 28.72 96.89 23.21 16.21 19.19 83.27 2 29.17 293.83 23.29 83.85 20.16 71.46 3 29.22 79.10 23.39 79.10 19.95 0 4 29.14 296.38 22.90 174.68 21.41 41.06 5 29.32 99.86 22.45 79.49 23.43 20.40 6 29.03 178.72 23.26 199.82 19.88 -11.81 7 28.88 251.91 23.12 311.36 19.94 -23.60 表 3 不同射程拦截仿真结果
Table 3. Simulation results of interception with different ranges
设定的预测命中点 射程/km 脱靶量/m 终点 拦截点偏移/m 末速度/ (m·s-1) x坐标/m y坐标/m z坐标/m x坐标/m y坐标/m z坐标/m -34 862 48 202 -35 956 50.09 15.79 -34 870 48 188 -35 965 19 4 686.31 -69 770 47 692 -71 961 100.02 19.06 -69 626 47 677 -71 812 208 4 066.02 -110 274 46 608 -113 736 158.42 28.24 -110 274 46 636 -113 736 29 3 164.37 -138 417 45 542 -142 763 198.54 36.85 -138 200 45 514 -142 540 312 2 781.90 -173 091 43 878 -178 526 248.31 81.13 -172 846 43 810 -178 273 359 2 587.59 -218 956 41 080 -225 831 314.38 23.63 -218 838 41 112 -225 709 173 2 566.10 -243 346 39 316 -250 987 349.59 63.27 -243 350 39 379 -250 991 63 2 598.21 -277 268 36 542 -285 973 398.33 86.28 -277 275 36 628 -285 981 86 2 660.54 -320 014 32 516 -330 062 460.45 194.60 -320 514 32 270 -330 577 759 2 740.87 -349 067 29 441 -360 027 502.05 199.82 -349 473 29 596 -360 446 604 2 796.76 -386 483 25 077 -398 618 554.99 1.57 -386 325 25 095 -398 455 228 2 838.07 -432 395 19 101 -445 971 620.12 385.45 -431 661 19 588 -445 214 1 161 2 834.60 表 4 设定的预测命中点坐标
Table 4. Expected predicted impact point coordinate
序号 x/m y/m z/m 1 -34 862 48 202 -35 956 2 -69 770 47 692 -71 961 3 -138 417 45 542 -142 763 4 -277 268 36 542 -285 973 表 5 存在航路捷径时的脱靶量
Table 5. Miss distance with course shortcut
航路捷径/km 脱靶量/m 点1 点2 点3 点4 0 3.64 19.06 36.85 86.28 50 6.05 4.85 33.76 118.10 100 36.12 82.94 24.95 134.39 150 178.31 75.37 33.20 258.81 200 87.18 124.92 71.07 449.50 250 55.86 42.33 127.59 415.55 300 37.56 52.74 153.13 326.55 350 95.33 104.96 217.85 135.17 400 180.90 191.41 353.20 128.68 450 260.17 230.11 225.70 500 260.78 168.21 109.11 550 125.82 103.70 167.82 600 319.18 377.57 表 6 不确定性仿真结果
Table 6. Uncertainty simulation results
射程/km 无噪声脱靶量/m 有噪声平均脱靶量/m 有噪声脱靶量标准差/m 平均飞行时间/s 有噪声脱靶量最大值/m 158.42 28.24 27.94 2.08 69.73 32.66 349.59 63.27 83.21 11.25 147.65 118.10 554.99 1.57 18.04 13.02 210.51 60.86 620.12 385.45 384.89 23.31 228.39 435.42 -
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