|
|
EDA365欢迎您登录！
您需要 登录 才可以下载或查看，没有帐号？注册
x
我在用place函数的的时候出现了如下的错误# u9 h8 p! h+ ]6 t& E8 L( F
The "place" command could not place the poles at the specified locations. Probable causes include:
& }" n) ]/ Z. s- N7 {" `* (A,B) is nearly uncontrollable
5 z6 a0 K6 z5 A4 C# d* The specified locations are too close to each other.
" m& k) N- m" O: K; J2 {6 n; s! G2 o m
但是我的状态空间模型是从传递函数转过来的，而且我的极点设计也没有很近呀，下面是我的程序：/ w/ J/ u9 W& c& }2 O8 p9 K
num11=[-24.88];: A* z8 i; b6 ]' h5 B
den11=conv([475.35 1],[511.85 1]);
+ _8 P$ H! K6 i: b5 B% R( @+ Enum12=[-20.634];$ q$ k" a3 J# N) `& C7 l. z
den12=conv([491.98 1],[501.11 1]);- J7 h0 A9 u: U! {: U% J
num21=[0.42];
6 L# v s1 N+ a% n0 g; oden21=conv([422 1],[604.4 1]);
1 p4 U9 d% l. w4 \num22=0.57;
# M- _+ a( r( d) k1 e; U8 xden22=conv([518 1],[502.7 1]);
+ x* M+ w$ T6 ^$ B[A1,B1,C1,D1]=tf2ss(num11,den11);
" `5 W) c' A8 Q$ y/ v0 v5 g+ O6 R+ u[A2,B2,C2,D2]=tf2ss(num12,den12);( y8 q7 u/ x( h- e6 r! p& ?
[A3,B3,C3,D3]=tf2ss(num21,den21); j# j. G3 A) T( q" M. s
[A4,B4,C4,D4]=tf2ss(num22,den22);8 c! ~" T8 w1 J* v" d. N
S_m11=ss(A1,B1,C1,D1);
# J2 N+ L: u; X, G% rS_m12=ss(A2,B2,C2,D2);
' j- j0 U/ `5 H5 A# F) x- X g" jS_m21=ss(A3,B3,C3,D3);
* J4 V6 e$ j" o. G9 t* M6 lS_m22=ss(A4,B4,C4,D4);9 Y, a; Z( b8 J0 {, q* C* }
PP=[S_m11,S_m12;S_m21,S_m22];' _# k2 s3 O$ Y# y
[As,Bs,Cs,Ds]=ssdata(PP);%得到传递函数模型
# M5 u$ b; K8 A" ^" ~2 J( U9 {3 v! J( W$ l
J=[-2+2*j,-2-2*j,-20+j,-20-j,-50,-100,-200,-300];
9 B4 U* }1 `) b7 ], h1 c7 P# EKx=place(As,Bs,J);
a n) u: \$ s; ?
7 t& T/ H9 m7 x3 @! z
7 d4 l* o6 G8 P! _, f0 Z |
|
/1 
发表于 2020-9-23 10:51
收藏
淘帖
支持！
反对！
楼主