Systems Engineering and Electronics ›› 2024, Vol. 46 ›› Issue (11): 3690-3702.doi: 10.12305/j.issn.1001-506X.2024.11.11
• Sensors and Signal Processing • Previous Articles Next Articles
Effect of local shape parameters on RCS of high-speed vehicle
Jun LIU1, Jie REN1, Fenghua CHI2,*, Shibin LUO1, Shengxian ZHENG1, Jiawen SONG1
- 1. Research Institute of Aerospace Technology, Central South University, Changsha 410083, China
2. Science and Technology on Space Physics Laboratory, China Academy of Launch Vehicle Technology, Beijing 100076, China
-
Received:2024-01-19Online:2024-10-28Published:2024-11-30 -
Contact:Fenghua CHI
CLC Number:
Cite this article
Jun LIU, Jie REN, Fenghua CHI, Shibin LUO, Shengxian ZHENG, Jiawen SONG. Effect of local shape parameters on RCS of high-speed vehicle[J]. Systems Engineering and Electronics, 2024, 46(11): 3690-3702.
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Fig.1
Schematic of cruise missile model for validation[36]"
Fig.1
Fig.2
Mesh for RCS computation"
Fig.2
Fig.3
Algorithm validation"
Fig.3
Table 1
Comparison of RCS log-mean obtained by different methods dBsm"
| 方向角域 | 实测[ | RECOTA[ | PO法 | MLFMM |
| 前向 | -25.02 | -23.80 | -23.99 | -23.46 |
| 侧向 | -14.44 | -11.69 | -11.14 | -10.31 |
| 后向 | -21.80 | -22.38 | -24.43 | -23.94 |
Table 1
Fig.4
Schematic diagram of the revolutionary model"
Fig.4
Fig.5
RCS comparison of exponential busbar body"
Fig.5
Table 2
Comparison of RCS log-mean of exponential busbar revolutionary body dBsm"
| 曲线指数 | RCS对数均值 | 0°方向角RCS | 侧向方向角波峰RCS |
| 0.60 | -14.46 | -16.42 | 25.35 |
| 0.65 | -15.76 | -15.51 | 22.64 |
| 0.70 | -16.67 | -13.01 | 26.71 |
| 0.75 | -17.35 | -14.12 | 24.81 |
Table 2
Fig.6
Comparison of RCS for different types of busbar"
Fig.6
Table 3
Comparison of RCS log-mean of busbars with different types dBsm"
| 线形 | 平均RCS | ||
| 0~60° | 70~90° | 0~120° | |
| 锥型 | -25.47 | -6.04 | -20.11 |
| 圆弧型 | -27.75 | 12.88 | -16.98 |
| 抛物线型 | -27.91 | 12.34 | -17.22 |
| 冯卡门型 | -27.01 | 12.14 | -15.82 |
| 指数0.75 | -27.04 | 2.66 | -19.08 |
Table 3
Fig.7
One-dimensional range image of exponential busbar"
Fig.7
Fig.8
One-dimensional range image of busbar with different types"
Fig.8
Fig.9
Baseline model of blunted leading-edge vehicle"
Fig.9
Fig.10
RCS comparison of vehicles with different leading-edge blunting radii at different elevations"
Fig.10
Table 4
Comparison of RCS log-mean in forward angular domain with different leading-edge blunting radii dBsm"
| 仰角 | R10 | R15 | R20 | R25 | R30 |
| 0° | -24.25 | -22.74 | -21.69 | -20.43 | -19.38 |
| 10° | -24.31 | -22.92 | -21.80 | -20.21 | -19.32 |
| 20° | -23.63 | -22.50 | -21.85 | -19.66 | -18.86 |
| 30° | -23.65 | -22.79 | -20.53 | -18.82 | -17.98 |
Table 4
Table 5
Comparison of RCS log-mean in side-direction angular domain with different leading-edge blunting radii dBsm"
| 仰角 | R10 | R15 | R20 | R25 | R30 |
| 0° | -29.13 | -27.41 | -26.94 | -25.77 | -24.73 |
| 10° | -27.45 | -25.88 | -25.60 | -24.91 | -23.89 |
| 20° | -26.70 | -24.77 | -23.63 | -23.69 | -23.26 |
| 30° | -24.93 | -24.00 | -22.64 | -22.52 | -21.42 |
Table 5
Table 6
Comparison of RCS log-mean in backward angular domain with different leading-edge blunting radii dBsm"
| 仰角 | R10 | R15 | R20 | R25 | R30 |
| 0° | -36.23 | -32.60 | -30.16 | -29.42 | -27.83 |
| 10° | -32.83 | -30.16 | -28.72 | -29.65 | -29.81 |
| 20° | -33.63 | -31.40 | -30.59 | -30.32 | -29.67 |
| 30° | -31.35 | -30.58 | -30.12 | -29.83 | -29.78 |
Table 6
Table 7
Comparison of RCS reduction when reducing the same blunting radius dBsm"
| 角域范围 | R30→R25 | R25→R20 | R20→R15 | R15→R10 | 总减缩量 |
| 前向扇区 | 0.90 | 1.69 | 1.27 | 1.22 | 5.08 |
| 侧向扇区 | 0.90 | 0.48 | 0.81 | 1.54 | 3.73 |
| 后向扇区 | 0.53 | 0.09 | 1.29 | 2.33 | 4.82 |
Table 7
Fig.11
Schematic of blunting shapes outline"
Fig.11
Fig.12
Comparison of RCS in forward angle domain for different elevations"
Fig.12
Fig.13
Arc blunting shape"
Fig.13
Fig.14
Variable-radius-arc blunting shape"
Fig.14
Fig.15
RCS comparison between arc blunting and variable-radius-arc blunting"
Fig.15
Fig.16
Design schematics of variable-radius-arc"
Fig.16
Table 8
RCS log-mean statistics of arc blunting and variable-radius-arc blunting at different elevations dBsm"
| 仰角/(°) | 前向对数RCS均值 | 全向对数RCS均值 | |||||
| 圆弧 | 变半径弧形 | 减缩量 | 圆弧 | 变半径弧形 | 减缩量 | ||
| 0 | -26.14 | -29.00 | 2.86 | -26.80 | -26.96 | 0.16 | |
| 5 | -26.03 | -29.86 | 3.83 | -26.76 | -28.15 | 1.39 | |
| 10 | -26.01 | -31.02 | 5.01 | -26.63 | -29.21 | 2.58 | |
| 15 | -25.98 | -31.38 | 5.40 | -27.11 | -30.58 | 3.47 | |
| 20 | -25.95 | -32.01 | 6.06 | -27.11 | -30.78 | 3.67 | |
| 25 | -25.81 | -32.61 | 6.80 | -27.22 | -32.00 | 4.78 | |
| 30 | -25.43 | -33.07 | 7.64 | -27.63 | -33.15 | 5.52 | |
| 35 | -25.46 | -33.20 | 7.74 | -27.23 | -32.81 | 5.58 | |
| 40 | -25.63 | -33.48 | 7.85 | -27.22 | -32.68 | 5.46 | |
| 平均 | -25.83 | -31.74 | 5.91 | -27.08 | -30.70 | 3.62 | |
Table 8
Fig.17
Comparison of RCS log-mean between arc blunting and variable-radius-arc blunting in different frequency bands"
Fig.17
Fig.18
RCS log-mean of variable-radius-arc blunting shape in different frequency bands in the forward angular domain"
Fig.18
Fig.19
RCS log-mean of variable-radius-arc blunting shape in different frequency bands in the omnidirectional angular domain"
Fig.19
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