类HTV⁃2飞行器光电特性的分析评估技术

doi:10.7527/S1000-6893.2023.29465

Abstract

Abstract:

The hypersonic vehicle has long flight time， fast speed and strong maneuverability in the atmosphere. During the flight， the thermochemical non-equilibrium flow field will be generated around the vehicle to have a serious impact on the optical radiation and radar scattering characteristics of the target. In this paper， an analysis and evaluation technology of the optical radiation and radar scattering characteristics of the HTV-2-like vehicle is developed and improved， and its validity is verified by ground test data. A software for analysis and evaluation of the optical radiation and radar scattering characteristics of the HTV-2-like vehicle with independent intellectual property rights is developed. The optical radiation and radar scattering characteristics of hypersonic targets are evaluated using detection distance as the analysis and evaluation function.Methods to improve the detection and guidance capabilities of defense system， such as over-the-horizon detection of the hypersonic vehicle based on wake RCS characteristics and ultraviolet guidance that eliminates the influence of thermochemical non-equilibrium flow field， are proposed. The results of our study can provide technical support for the study of optical radiation and radar scattering characteristics of hypersonic vehicles.

Key words: hypersonic, optical radiation, radar scattering, detection, guidance

CLC Number:

Zhefeng YU, Shichang LIANG, Weibo SHI, Deyang TIAN, Anhua SHI, Dongjun LIAO, Ying YANG. Analysis and evaluation technology for optical radiation and radar scattering characteristics of HTV⁃2⁃like vehicle[J]. Acta Aeronautica et Astronautica Sinica, 2023, 44(S2): 729465-729465.

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试验状态	激波脱体距离
试验状态	试验值/mm	计算值/mm	相对误差/%
v_t=2.69 km/s	0.708 8	0.732 9	3.4
F_t=4.2 kPa	0.708 8	0.732 9	3.4
v_t=4.25 km/s	0.581 0	0.578 2	0.48
F_t=4.2 kPa	0.581 0	0.578 2	0.48
v_t=5.07 km/s	0.403 5	0.430 6	6.7
F_t=4.2 kPa	0.403 5	0.430 6	6.7
v_t=6.0 km/s	0.501 2	0.487 2	2.7
F_t=4.2 kPa	0.501 2	0.487 2	2.7

状态	光辐射强度/（10^-3 W·Sr^-1·mm^-1）
	3~5 μm波段		8~12 μm波段
	理论计算	试验峰值	理论计算	试验峰值
1	1.54	1.66	0.82	0.54
2	2.16	4.05	0.96	0.72
3	3.05	20.8	1.13	2.00
4	5.88	41.7	1.58	3.68
5	6.51	29.7	1.67	3.64

流场模型	RCS试验结果/ dBsm	RCS计算结果/ dBsm
v_t=2.69 km/s	-30.9	-30.9
F_t=4.2 kPa	-30.9	-30.9
v_t=4.25 km/s	-31.2	-31.8
F_t=4.2 kPa	-31.2	-31.8
v_t=5.1 km/s	-31.4	-31.3
F_t=4.2 kPa	-31.4	-31.3

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Analysis and evaluation technology for optical radiation and radar scattering characteristics of HTV⁃2⁃like vehicle

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