MIMO（多输入多输出）系统解耦方法

许多文章和书中都描述了具有2输入2输出解耦方法的MIMO系统与SISO系统。如何m * n个大小传递函数系统？我们如何将这种方法推广到例如3 * 3或3 * 7 MIMO系统？

这是2 * 2 MIMO系统的描述：

用到窗体 $\mathrm{D_{11}(s)=D_{22}(s)=1}$

$D (s) = [\begin{matrix} D_{11} (s) & D_{12} (s) \\ D_{21} (s) & > D_{22} (s) \end{matrix}]$ $\mathrm{D(s)}=\begin{bmatrix} D_{11}(s) & D_{12}(s) \\ D_{21}(s) & > D_{22}(s) \\ \end{bmatrix}$
在这里，我们用公式中的结构指定一个解耦响应和一个解耦器

$G_{p} (s) D (s) = [\begin{matrix} G_{11} (s) & 0 \\ 0 & G_{22} (s) > \end{matrix}] [\begin{matrix} G_{11} (s) & G_{12} (s) \\ G_{21} (s) & > G_{22} (s) \end{matrix}] [\begin{matrix} 1 & D_{12} (s) \\ D_{21} (s) & 1 > \end{matrix}] >= [\begin{matrix} G_{11}^{*} (s) & 0 \\ 0 & G_{22}^{*} (s) \end{matrix}]$ $G_p(s)D(s)=\begin{bmatrix} G_{11}(s) & 0 \\0 & G_{22}(s) > \end{bmatrix} \\ \begin{bmatrix} G_{11}(s) & G_{12}(s) \\ G_{21}(s) & > G_{22}(s) \end{bmatrix} \begin{bmatrix} 1 & D_{12}(s) \\ D_{21}(s) & 1 > \end{bmatrix} > = \begin{bmatrix} G^*_{11}(s) & 0 \\ 0 & G^*_{22}(s) \end{bmatrix}$
我们可以求解四个未知数中的四个方程

$D_{12} (s) = - \frac{G_{12} (s)}{G_{11} (s)} D_{21} (s) => - \frac{G_{21} (s)}{G_{22} (s)} G_{l 1} (s) = G_{11} (s) = - \frac{G_{12} (s) G_{21} (s)}{G_{22} (s)} G_{l 2} (s) = G_{22} (s) = - \frac{G_{21} (s) G_{12} (s)}{G_{11} (s)}$ $D_{12}(s) = -\frac{G_{12}(s)}{G_{11}(s)} \\ D_{21}(s) = > -\frac{G_{21}(s)}{G_{22}(s)} \\ G_{l1}(s) = G_{11}(s) = -\frac{G_{12}(s)G_{21}(s)}{G_{22}(s)} \\ G_{l2}(s) = G_{22}(s) = -\frac{G_{21}(s)G_{12}(s)}{G_{11}(s)}$

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— 拉希德
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您可能需要查看网络分析和综合教科书，例如Kuo或Brian DO Anderson和Sumeth Vongpanitlerd。如今，这不是一门学得太多的学科。

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我认为您正在寻找状态空间表格。

— leCrazyEngineer

对数学stackexchange可能有助于此主题math.stackexchange.com/questions/1297659/...

— 乔斯

$n$ $m$

\dot{x} = f (x) + g_{1} (x) u_{1} + \dots + g_{m} (x) u_{m}

$\dot{x}=f(x)+ g_1(x)u_1 + \ldots + g_m(x)u_m$

y_{1} = h_{1} (x), \dots, y_{m} = h_{m} (x)

$y_1 = h_1(x), \ldots, y_m = h_m(x)$

$h$ $f$ $f$

L_{f} h (x) = \frac{\partial h}{\partial x} f (x)

$L_{f}h(x) = \frac{\partial h}{\partial x}f(x)$

\begin{aligned} L_{g} L_{f} & = \frac{\partial (L_{f} h)}{\partial x} g (x) \\ L_{f}^{2} h (x) & = L_{f} L_{f} h (x) & = \frac{\partial (L_{f} h)}{\partial x} f (x) \\ L_{f}^{k} h (x) & = L_{f} L_{f}^{k - 1} h (x) & = \frac{\partial (L_{f}^{k - 1})}{\partial x} f (x) \end{aligned}

$\begin{split} L_g L_f &= \frac{\partial (L_f h)}{\partial x}g(x)\\ L_f^2 h(x) &= L_f L_f h(x) &= \frac{\partial (L_f h)}{\partial x}f(x)\\ L_f^kh(x) &= L_f L_f^{k-1}h(x) &= \frac{\partial (L_f^{k-1})}{\partial x}f(x) \end{split}$

$i$

{\dot{y}}_{i} = L_{f} h_{i} (x) + L_{g_{1}} h_{i} (x) u_{1} + \dots L_{g_{m}} h_{i} (x) u_{m}

$\dot{y}_i = L_fh_i(x) +L_{g_1}h_i(x)u_1 +\ldots L_{g_m}h_i(x)u_m$

x

$x$

(L_{g_{1}} h_{i} (x), \dots, L_{g_{m}} h_{i} (x)) \neq (0, \dots, 0)

$\left(L_{g_1}h_i(x),\ldots,L_{g_m}h_i(x) \right)\neq (0,\ldots,0)$

i

$i$

k_{i} = 1

$k_i = 1$

$k$ $i$

(L_{g}, L_{f}^{k_{i} - 1} h_{i} (x), \dots, L_{g_{m}} L_{f}^{k_{i} - 1} h_{i} (x)) \neq (0, \dots, 0)

$\left(L_g,L_f^{k_i-1}h_i(x),\ldots,L_{g_m}L_f^{k_i-1}h_i(x)\right) \neq (0,\ldots,0)$

x

$x$

u (x) = - A^{- 1} (x) N (x) + A^{- 1} (x) v

$u(x) = -A^{-1}(x)N(x)+A^{-1}(x)v$

A (x)

$A(x)$

N (x)

$N(x)$

v

$v$

A (x) = (\begin{matrix} L_{g_{1}} L_{f}^{k_{1} - 1} h_{1} (x) & \dots & L_{g_{m}} L_{f}^{k_{1} - 1} h_{1} \\ ⋮ & ⋮ \\ L_{g_{1}} L_{f}^{k_{m} - 1} h_{m} (x) & \dots & L_{g_{m}} L_{F}^{k_{m} - 1} h_{m} \end{matrix}), N (x) = (\begin{matrix} L_{f}^{k_{1}} h_{1} (x) \\ ⋮ \\ L_{f}^{k_{m}} h_{m} (x) \end{matrix})

$A(x) = \begin{pmatrix} L_{g_1}L_f^{k_1-1}h_1(x) & \ldots & L_{g_m}L_f^{k_1-1}h_1\\ \vdots & & \vdots\\ L_{g_1}L_f^{k_m-1}h_m(x) & \ldots & L_{g_m}L_F^{k_m-1}h_m\\ \end{pmatrix},\quad N(x) = \begin{pmatrix} L_f^{k_1}h_1(x)\\ \vdots\\ L_f^{k_m}h_m(x) \end{pmatrix}$

$A(x)$ $x$

— 无用的机器
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