Fixed Time Control of RLV landing Section Under the Influence of Complex Wind Field

Table 1. Tab.1Initial conditions for the attitude angle
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Table 1. Tab.1Initial conditions for the attitude angle
序号条件1 条件2 条件3 条件4 条件5 条件6
状态 $φ_{0} = 1$ ° $φ_{0} = - 1$ ° $φ_{0} = 2$ ° $φ_{0} = - 2$ ° $φ_{0} = 3$ ° $φ_{0} = - 3$ °

Table 2. Tab.2Control parameter values for the conditions listed in Tab.1
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Table 2. Tab.2Control parameter values for the conditions listed in Tab.1
组成项参数值
观测器参数 $\begin{matrix} k_{1} = l_{1} = 15, k_{2} = l_{2} = 75, k_{3} = l_{3} = 125, \\ K = 1, α_{1} = 0.8, β_{1} = 1.2 \end{matrix}$
控制律参数 $m_{1} = m_{2} = 5, n_{1} = n_{2} = 2, a = 1.1, b = 0.8$

Table 3. Tab.3Control parameter values for the limited time method
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Table 3. Tab.3Control parameter values for the limited time method
控制方法参数值
有限时间方法 $\begin{matrix} k_{1} = 18, k_{2} = 108, k_{3} = 216, α_{1} = 0.8, \\ m_{1} = m_{2} = 6, b = 0.8 \end{matrix}$

Table 4. Tab.4ITAE and RMSE values for the channels of different controllers

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Table 4. Tab.4ITAE and RMSE values for the channels of different controllers

控制方法	ITAE值/[(°)·s²]			RMSE值/(°)
控制方法	俯仰	偏航	滚转	俯仰	偏航	滚转
无观测器	0.409 8	3.404 6	46.783 4	0.006 0	0.005 2	0.428 9
有限时间方法	0.008 3	0.784 1	1.152 5	0.005 9	0.003 3	0.027 7
本文方法	0.007 5	0.736 9	0.866 5	0.005 4	0.002 7	0.024 4

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Naigang CUI, Guoxin QU, Yuhao ZHANG. Fixed Time Control of RLV landing Section Under the Influence of Complex Wind Field[J]. AEROSPACE SHANGHAI, 2024, 41(4): 1

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