Research on Flight Kinematics of the Parafoil System under Wind

参数名称	数值	参数名称	数值
翼伞展长$b$/m	7.50	翼伞质量$ m_{\mathrm{s}} $/kg	5
翼伞弦长$c$/m	3.75	翼伞特征面积$ A\mathrm{_s} $/m²	28
切口高度$e$/m	0.675	载荷物质量$ m_{\mathrm{w}} $/kg	135
安装角$\mu $/（°）	9	载荷物特征面积$ A_{\mathrm{w}} $/m²	0.50
翼伞质心距系统质心距离$ L_{\mathrm{s}} $/m	7.50	载荷物质心距系统质心距离$ L\mathrm{_w} $/m	0.50

Table 2. Initial flight conditions
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Table 2. Initial flight conditions
(X,Y,Z)/m (V_x,V_y,V_z)/(m·s⁻¹) (φ,θ,ψ)/(º)
(0, 0, −1 000) (10.50, 0, 3.50) (0, −10, 0)

Table 3. Comparisons of system speed
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Table 3. Comparisons of system speed
速度参数文献[24] 仿真结果误差/%
V_x /(m·s⁻¹) 10.85 10.54 2.86
V_y /(m·s⁻¹) 5.39 5.18 3.90
V_z /(m·s⁻¹) 3.24 3.34 3.09
K 3.74 3.52 5.88

Table 4. Stabilized motion characteristics of the system under different wind directions

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Table 4. Stabilized motion characteristics of the system under different wind directions

特征参数	无风	顺风	逆风	侧风
V_wind/(m·s⁻¹)	0	4.24	−4.24	4.24
V_xy/(m·s⁻¹)	10.98	15.35	6.74	11.88
V_z/(m·s⁻¹)	3.67	3.74	3.67	3.77
K	2.99	4.11	1.84	3.15
φ/(°)	0	0	0	−0.01
θ/(°)	−11.79	−12.38	−10.85	−12.40
ψ/(°)	0	0	0	−0.60

Table 5. Steady flight kinematics of the system at different altitudes

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Table 5. Steady flight kinematics of the system at different altitudes

高度/km	顺风			逆风			侧风
高度/km	V_xy/(m·s⁻¹)	V_z/(m·s⁻¹)	K	V_xy/(m·s⁻¹)	V_z/(m·s⁻¹)	K	V_xy/(m·s⁻¹)	V_z/(m·s⁻¹)	K
1	15.35	3.74	4.11	6.74	3.67	1.84	11.88	3.77	3.15
2	16.42	3.95	4.15	6.76	3.82	1.77	12.51	3.93	3.18
3	17.36	4.18	4.15	7.18	4.05	1.77	13.19	4.16	3.17
4	18.29	4.44	4.12	7.73	4.29	1.80	13.90	4.41	3.15

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Liang DONG, Yanjun LI, Yang CHENG, Li YU. Research on Flight Kinematics of the Parafoil System under Wind[J]. Spacecraft Recovery & Remote Sensing, 2024, 45(5): 13

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